Filed under: Foot Care Products, Footwear Products, Health, Sports, Travel
Many athletes suffer from cold feet.
Athletes have several options to deal with cold feet. The first, most commonly tried, is different socks. Some simply try thicker socks or two pair. Others go straight to thermal type socks made with wool or some other blend of yarns.
Footwear is often a contributing factor to cold feet. Today’s running shoes typically have a part-mesh upper, which lets cold air inside the shoes. And since the mesh is over the forefoot and toes, they get cold first. Secondly, footwear that is too tight, because the wearer has thicker than normal or two pairs of socks, causes constriction and impedes circulation.
Something else often tried is disposable chemical warming packets. These seem inexpensive at first, but because they are single time use, the costs add up quickly. Packs of 10, using two at a time, go fast. And they often don’t generate enough heat to provide overall warmth.
Another option for cold feet is one of the new lines of heated insoles. One major heated insole companies is Thermacell. While not cheap, if you suffer from cold feet long enough, you’ll likely be willing to spend the money for warm feet. Their insoles are water resistant, and durable. Once they reach the desired temperature, they turn off and then turn back on when needed. The insole’s top is molded and cushioning while underneath the inner components, is an insulated layer to keep heat from escaping. The insoles can be trimmed to fit shoes or boots.
Thermacell has two types of insoles:
Heater Insole Foot Warmers with embedded batteries that can be recharged 500+ times. Operated by a wireless remote control, they operate with lithium-ion polymer batteries embedded in the insoles. The three options are no heat, medium (100 degrees F), and high (111 degrees F). Each charge will last up to five hours with a medium heat setting. The batteries can be recharged at least 500 times and recharges in four hours or less. Their website currently offers a free car charger with every pair purchased while supplies last. These Heated Insoles retail are selling for $129.99 and come in full and half sizes. Click here for Thermacell Insole Foot Warmers.
ProFLEX Heated Insoles with removable batteries for extended use. They have the same features as the above insoles, same heating options, same wireless remote control, and the same rechargeable batteries. The first main difference is that the batteries are removable and replacement batteries are available. The second difference is that these are charged with a USB port or the customary wall charger. These insoles retail for $184.99. Click here for Thermacell ProFLEX Heated Insoles.
Thermacell’s insoles have been tested by SATRA, the worldwide leader in footwear research development and testing. SATRA found the insoles resistant to moisture, verified the five hour run time, and that the insoles maintain foot comfort with their heating.
If you feet are always cold, I’d look at these Thermacell insoles to help keep them warm. These could work in running shoes, cycling shoes, and hiking boots, as well as your normal everyday shoes. Make sure to check the insole thickness inside your shoes to see if you need to wear a less bulky sock.
Filed under: blister care, Foot Care, Footwear, Footwear Products
Heel blisters are quite common – although they shouldn’t be.
Today’s post shows one participant’s feet at the 2014 Amazon Jungle Marathon.
If you look closely at this picture, you’ll see two heel blisters, both on the outside of the runner’s feet. The right foot blister is large but is not blood-filled. The blister on the left heel, however, is very large and filled with a large amount of blood.
It’s easy to think these are normal blisters – but their size makes they abnormal.
In my experience, heel blisters are caused by the constant shear when either 1) the heel is moving up and down inside the shoes’ heel, or 2) by the constant movement at the place where the shoe’s insole touches the inside of the shoe. Over the years, the majority of heel blisters have been the latter. One of the characteristics of this “insole/shoe junction” blister is that they often are flat across the bottom. The blister starts at the point where the insole’s edge at the side of the heel touches the inside of the shoe. That’s what makes the flat line at the bottom. Then the blister forms upward as the fluid forms and it grows. Given enough time and movement, you’ll get blood inside.
These are relatively simple to patch. The skin must be cleaned with alcohol wipes, and then the blister can be lanced and drained. Depending on the size of the blister, you’ll need to apply some type of blister patch. The bottom line is that you need to have something over the blister to protect the skin and prevent the top layer of skin from tearing off. For these, I would use strips of kinesiology tape (my preference is either StrengthTape or RockTape H2O) with antibiotic ointment over the blister to keep the tape from sticking to the skin. The larger the blister, the harder these are to patch but it can be done.
You are better off to prevent these blisters in the first place.
Start with the fit. Make sure your shoes hold your heels in place with just a little movement.
Check your shoes and insoles for rough and/or thick edges at the inside and outside of each heel. Side blisters are much more common than the back of the heel. If the insole has a large thick edge, replace them. If the shoe’s fabric is worn into a hole, you are due for new shoes. Under the fabric is generally a plastic edge of the shoe’s heel counter – the plastic that curves around the heel from side to side.
Engo Blister Prevention Patches are perfect for to help prevent these types of blisters. These patches are super slick. Either the small or large oval can be applied to the inside of the shoe and cover the offending edge of the insole/shoe junction. Clean the inside of the shoe and insole first. I work the patch with my fingers to form a curve to fit with area I need to cover. Then remove the backing and apply the center of the patch first and then push the top and bottom of the patch into place. Rub it a bit to assure adherence.
Tonight I finished watching three episodes of the 2014 Spartan Races – two regional races and then the final World Championship. Regional races are about eight miles with 20+ obstacles while the World Championship is about 15 miles with 25+ obstacles.
I know. Some of you are saying. They aren’t the same as a 50-mile or 100-mile race. Ultrarunners are tough and our events are hard. Spartan Races are much shorter.
You are right of course. But. And it’s a huge “but”, Spartan Races have obstacles that I’d bet most ultrarunners could not complete. Carrying a 60-pound sandbag up and down a long grassy hill, the barbed wire roll, rope climbs, the log carry, carrying a five gallon bucket filled with rocks up and down a hill, tire pull, water obstacles, and more. In the World Championships, the sandbag carry was not one but two 60-pound bags carried up and back down a quarter mile black diamond equivalent grassy hill!
At the end of the Spartan Race World Championships, one of the top runners said, “In a triathlon, you sometimes say, ‘Ah shoot, I’ve got a pebble in my shoe – it threw my race off. This is so much beyond pebbles!’” What he’s saying is that what you think is bad in a one race is nothing in another race. Pebbles are the least of your worries in a Spartan Race.
You have to be in the best physical shape of your life for these events. So do your feet. Between the grassy hills, slick with water and mud, the muddy trails and roads, the uphills and downhills over rocky trails and roads, jumping onto and over walls, down cargo nets, and other challenges, your ankles and feet take a beating. You get junk in your shoes, and while no one in the shows complained of blisters, I am certain many of the racers had them. Just watching the shows I could see there would be sprained ankles along with other injuries.
If you can’t complete an obstacle, you have to do 30 burpees. And that’s after you failed at the obstacle. Your heart is racing and breathing is labored, and you are exhausted.
The Spartan Race website has the full series of races for 2015. Check out the website and see if this type of race interests you.
In April 2014, I wrote a review of the Reebok All-Terrain shoe designed for obstacle races like Spartan Races. Check it out here: Reebok All Terrain Shoe.
In addition, Joe Desena, the founder of Spartan Races, has a book Spartan Up! about overcoming obstacles in life, and is starting a podcast also called Spartan Up! You can subscribe at iTunes or Stitcher.
If the challenge of doing a Spartan Race interests you, here’s a code that will save you 10% on any race: SPARTANBLOGGER
Filed under: blister care, Foot Care, Foot Care Products, Sports
I have often mentioned the website BlisterPrevention.com.au as a great source of information on blister care. Rebecca Rushton, manages the website and is on top of developments in the prevention and care of blisters. She’s a podiatrist in Australia – and a friend.
Through research and looking at the mechanism of how blisters form, Rebecca has changed some old theories of what causes blisters. Heat, moisture, and friction were always considered the three contributors of blisters. Further consideration has found that shear is a major factor. Shear and friction combine to cause blister formation.
I want to quote a blog post by Rebecca about Healing Foot Blisters Faster to help you understand more about friction and shear.
“You know friction is responsible for friction blisters. But I bet you think friction is rubbing. It isn’t. Friction is about grip. High friction means two surfaces grip together. Low friction means they don’t … they’re slippery.
“Here’s how friction is responsible for foot blisters … There is high friction in your shoe. There just is. This means your skin grips your sock; and your sock grips your shoe. All three surfaces grip together so your foot doesn’t slide around in your shoe.
But with every step you take, your bones are moving around under the skin. And while the skin is stuck and the bones are moving back and forth. Everything in between is pulled and stretched. This pulling and stretching is what causes blisters.
We call it shear. And it needs high friction to get anywhere near blister-causing.”
With this opening, Rebecca starts to explain the effect of shear and friction on blister formation. She talks about cutting friction levels, especially when a blister develops, and gives examples of six friction reducers. Some of these are better than others.
We have always tried to reduce friction in both preventing blisters and when treating blisters. As Rebecca says, and I support, “Otherwise all that stretching (shear) continues at the blister base while it’s trying to heal. Making it hurt more. And taking longer heal.”
So take a moment and click on the Blister Prevention link and read Rebecca’s full blog post. While you are there, I encourage you to subscribe to her email list.
Many of you have participated in a 50-mile race, a 100-mile race, an adventure race, or some other type of multi-day race. Some multi-day races are non-stop while others are stage races. A lot of these races provide medical care at aid stations – and some also provide foot care.
If you have received foot care aid at these aid stations, you have been helped by the generous people I’ll call the “heroes” of foot care.
The picture shown here is from the Amazon Jungle Marathon this past October. Every one of the 15 members of our medical team helped with foot care. No one said they didn’t want to do feet. You can see the working conditions: sand everywhere, water bottles as footrests, a tarp to protect the runners and our knees (that quickly filled with sand), and supplies strewn all over and shared between medics. What you don’t see are the flies and bugs that were constantly in our faces, and the sweat running down our faces from the humidity. Now keep this up for hours, well into the night.
These are the heroes of foot care.
Most races have them. They volunteer their time and even supplies. They often go to races at their own expense. They work often under adverse and uncomfortable conditions. They want to do the best patch job possible. They are dedicated to getting you back into the race. They want you to have a great race experience. In short, they care.
I’ve been at races that have well-organized foot care services and others that have nothing. Some people providing their services are podiatrists, doctors, nurses, paramedics or EMTs, physical therapists, chiropractors, or other medical specialists. Other times they are simple people who have learned foot care techniques on their own or from someone else.
I know you appreciate these foot care people.
So how can you thank them? Let me share a few ideas.
- Simply say thank you.
- Make sure you have done everything possible to have healthy feet going into the race.
- Trim your toenails short and then file them smooth.
- Reduce calluses as much as possible.
- Wear quality shoes and socks.
- Know how to do your own foot care just in case we aren’t there or there’s a line for our services
- And finally, be patient. Good foot care and blister patching takes more than a minute.
We love helping runners and always welcome your appreciation.
Filed under: blister care, Foot Care, Footcare, Health, Sports, Travel
In early October I had the unique opportunity to return to Brazil and provide foot care to runners at the 10th Annual Jungle Marathon Amazon. The race is more than a marathon. It’s three races in one event set in a stage race format. Every day the race camp moves to a new location as the runners go through the jungle and along the beaches of the Amazon River. There’s a seven day, six stage race and a four day race, that both start at the same time. Then on day four, the single day marathon stage starts.
This year’s race was the toughest of any event I have been a part of. There was single track trails hacked through the jungle, red dirt roads with loose dirt, swamps and streams and rivers, humidity, heat, rain, sand that got everywhere, never ending wet feet and water-logged shoes, bugs and spiders and snakes, jaguar sightings, a lot of bee stings, either cold food or food heated with hot water, jungle and beach camps, carrying all your gear in a backpack, and nine nights in a hammock. Runner’s feet took a beating and as the days progressed, it was harder for them to recover. The cumulative affect of having your feet wet for the majority of every day, became a struggle for many runners. Maceration was a serious problem for everyone, and blisters affected all runners to varying degrees.
After the race ended, I was able to take a a few minutes and interview Amy Gasson, the second place women in the seven day race. Amy was a joy to know and smiled every day with a great positive attitude. Here’s the link to listen to the audio interview. It’s 17 minutes long.
Considering the interview was recorded with a handheld digital recorder, in the lobby of our hotel with all it’s normal background noises, the sound quality is remarkable. There’s a lot we can learn from what Amy shares. She did her homework and prepared well – both physically and her feet. Here’s a photo of Amy and me at the finish line.
Thanks Amy for letting me get to know you at the Jungle Marathon Amazon.
This post is an editorial about foot care at races – and more importantly, the lack of it.
Last week I returned from my second trip to Brazil to help provide foot care at the Amazon Jungle Marathon. I plan to write a post about the race later, so I won’t go into detail here – but this is the toughest race I have seen. Over the years I have worked many multi-day multi-sport adventure races and multi-day running races. Most of these are six or seven day events. Adventure races are races where the clock doesn’t stop until the team gets to the finish. Running races are typically stage races where each day is a specific mileage and camp changes every day.
Please continue reading – even if you don’t do multi-day races – because this blog post applies to those doing 24-hour races, 100 mile races, and athletes in general.
These types of races always have a list of mandatory gear. The list is composed of mostly safety items with a mix of medications and first aid stuff. Some of the first aid items can also be used for foot care. The photo shows an example of a first aid mandatory gear list. Here’s the rub though. Most athletes want to minimize, as much as possible, the amount and the weight of the stuff they have to carry. If the list calls for tape, they’ll carry a ½ inch wide very small roll, as few as possible blister patches, 2 or 3 alcohol wipes, 2 Band-Aids – you get the picture. They don’t have the right stuff because the lists are very general and don’t specify exact brands or types of supplies. They don’t have enough because they are not the average athlete and will need more. They only carry what they are required to carry and miss what they need for their feet. And many of these athletes don’t know how to use what they carry.
I have worked many multi-day races and have seen athletes finish a day’s stage and come to medical for every little thing. The medical staff should not have to manage all your foot care. You can manage the small pea-size blister on your toe. If you have hot spots, you can tape over them and check your shoes for seams. There is usually not enough medical staff to care for 100% of each runner’s needs. In addition, the supply of medical equipment is limited and can easily be over taxed by runners wanting everything done for them.
One runner in the Jungle Marathon came to see the medical team every day, telling us what he wanted down to the color of the tape and showing us all the spots on his feet he wanted fixed. We would have had to spend an hour just on him, with a lot of supplies, when he had a medical kit but wanted us to do it for him.
I am becoming more and more convinced that mandatory gear lists should be material specific. The width, length and type of tape should be listed. The number and type of blister patches. Scissors rather then a needle. Specific powder and amount. A specific number and type of tape adherent. And do on. The mandatory gear list needs to be reviewed with the medical director. This applies to runners in any race 50 miles or longer too. While the majority of runners don’t typically carry foot care supplies in a 100-mile run, their crews need to have the supplies.
I also am convinced that runners need to know how to patch their feet. Running a 100-mile race with no knowledge of how to care for one’s feet if and when problems develop is asking for trouble and putting undue burdens on the medical teams. You cannot assume that all medical personnel know how to patch feet – and have the best supplies for doing so.
Earlier this year I worked a multi-day event that had only basic medical supplies at the aid stations. There was virtually nothing that could effectively be used for foot care. The participants were not promised foot care, only first aid and medical personnel. In fact the pre-race materials did not mention foot care. Many aid stations did not allow crew access. The result was runners who were generally not carrying a foot care kit, had no crew access at many aid stations to help with their feet, and no medical personnel trained in or equipped to do foot care – a disaster waiting to happen. I had my complete foot care kit and worked on many runners’ feet. I know several other aid stations happened to have medical people who knew how to do basic foot care. But we each used our own supplies. I can honestly say that without the few of us on the course, the finishing rate would have been less than 30% because the race organizers did not think through the possible problems and build in solutions. Their disclaimer to me was that they had not promised foot care and runners were on their own.
In my opinion, putting on a race of any length requires race organizers to put runner safety as their first concern. Runners pay their money and expect a certain amount of good organization and common sense in return. In what has become a catch-22 situation, many runners genuinely expect there to be medical personnel able to manage emergencies as well as manage their feet. They think “first aid” and “medical personnel” means foot care. In reality, many races make no provision for foot care and take an “Oh well – that’s life” attitude. In fairness to medical personnel, I know anyone doing medical at an aid station will try and help any runner needing it. However they may not have the supplies and / or the training.
The Jungle Marathon had multiple doctors and paramedics, a fully stocked medical cache of basic and emergency supplies including medicines and narcotics, bandages and foot care supplies galore, and a complete set of medical protocols. Each checkpoint was manned by at least two medical personnel with a complete medical kit. Western States has great medical care at the major aid stations. So does Badwater.
In the end, every race lives and dies based on runner perceptions and what they share with their friends. Give them a bad experience; bad or non-existent medical care and / or foot care, and the word will spread.
Filed under: blister care, Foot Care, Footcare, Footwear, Health, toenails
Here are a few foot care tips I wrote to help runners at the Amazon Jungle Marathon. I’ll be there in a few weeks to help with foot care on the medical team. The tips are valuable for anyone doing a 24 hour race, a multi-day event, an adventure race, or a long backpack. Remember, your feet will carry you day to day only if you take care of them.
Start with good toenail care. Trim your nails short and then use a file over the front edge to remove any rough edges. File the tip of the nail so when you run your fingertip over the tip of the toe and over the nail, you don’t feel any rough edges. You can also file the top of the nail if it’s thick. Coming to the race with bad toenails will ensure toe blisters and black toenails.
Make sure your shoes fit well. Have enough room in the toe box for your toes to wiggle. Your feet may swell over the race and you don’t want shoes that are too tight. Some shoes, like Hokas, retain water and become heavy over the days, as they are wet so much of the time. Wet and waterlogged shoes are heavy.
Get good socks. Don’t show up with cotton socks. Socks made with Coolmax or wool are good choices. Injinji toe socks are great. Have several pair and wash then after each day’s stage or have one pair per day. Also don’t show up with old socks or ones with holes in them.
Do whatever you can to reduce any calluses. Getting a blister under a callus can be painful and it’s very hard to find the pocket of fluid for draining. After showering, use a callus file or pumice stone to shave the callused skin from your feet. Then apply some callus cream. This is something that should be done several times a week. Calluses are the result of friction and pressure between your shoes and feet. Make sure your shoes will drain water.
Shoes that hold water inside will increase the maceration effect of your feet being wet to long, leading to wrinkled and soften skin that can fold over, crease, and split open. Check this by filling your shoes with water and seeing whether it will drain out. You can heat a nail (at least 1/8 inch round) or an awl and make several holes at the inside and outside arch, and the heel of your shoes. Learn how your feet respond to being wet for long periods. Do some long walk or runs three to six hours long with wet feet. Try several products like Desitin or similar cream for baby bottoms that works to control moisture on the skin. Google “baby bottom cream” to see many options.
Do not skimp corners on your foot care kit you need to carry in your pack. Have several yards of a good quality tape, several needles to drain blisters, and learn how to drain and patch blisters. The medical team will try and help with your foot care needs, but we can become overwhelmed by the number of people wanting help. Part of your responsibility as a runner is to know how to do good foot care.
Carry a good pair of camp shoes to wear in the camp after each day’s stage. You don’t want to walk around barefoot and doing so will destroy the taping or blister patching done by you or the medical team. Lightweight Crocs, flip-flops, or sandals are easy to strap to your pack. Change into these after running to allow your skin time to heal from the moisture.
Filed under: Foot Care, Foot Care Products, Footwear, Health, Sports
Insoles and Beyond is a family-owned small business based in North Carolina. They want to help you be comfortable, avoid injury, and reduce any pain you are experiencing. Their insole line includes a wide variety of insoles from manufacturers including, Birkenstock, currexSole, New Balance, Powerstep, Sof Sole, and Sole. Whether you are looking for orthotics for plantar fasciitis pain, arch support inserts for comfort, or insoles for running shoes and other sports performance, you can find them at Insoles and Beyond. Within each company’s line are a variety of insoles and sizes. You can look for insoles by company name, foot type, activity, pain/condition, and shoe type. They also carry compression wear from CEP compression and Mediven, and offer ankle braces, knee braces and splints as well.
Because many athletes don’t understand insoles, I asked Stacey some questions about insoles. I think the questions will help you when you need insoles, or if you are unsure why you should replace the standard “sock liner” that came with your shoes. For years, I have told people that generally speaking, the stock sock liners shipped in shoes offer little support and are of little help. Many are simply thin pieces of foam or cardboard. Read on to learn about insoles. Then check out Insoles and Beyond’s website.
I’ve run for years and always used the regular insoles that come with shoes. Why should I consider a replacement pair of insoles? Most running shoes (expensive and inexpensive alike) use very simple and cheap foam insoles despite the tons of science that goes into making the rest of the shoe. Many runners will spend $100 to $200 on a pair of running shoes based on the materials and technology used to make them but then leave in the relatively generic insoles that come with the shoes. It makes sense that shoe manufacturers don’t invest much in the insoles – everyone’s foot is different. Shoe manufactures leave it to the consumer to purchase the appropriate insoles for their specific foot needs – high arches, low arches, overpronation, etc. Additionally, some people want more cushioning than others. Some want more support than others. Personally, the first thing I do when I buy a pair of shoes is rip out the “sock liner” and put in a pair of my favorite insoles.
There’s a whole bunch of replacement insoles to choose from, how can I make an intelligent choice? Our website has some good information on the various types of insoles and categories (collections) to help you find the insole that is appropriate for you. So, that’s a good starting place. However, within the categories (insoles for plantar fasciitis, insoles for running, insoles for hiking, etc.) there may still be questions. At that point, I’d suggest calling us or sending us an email to discuss things further.
Are certain insoles better than others for minimalist shoes and zero-drop shoes? Absolutely. Lower profile/volume insoles are best for minimalist shoes. Sole’s ThinSport and currexSole’s RunPros are both low volume options. The ThinSport has the same arch support as Sole’s Response and Ultra, but with less cushioning. The currexSole RunPros pack a lot of cushioning and less arch support (allowing for a more natural feel). Most insoles are neutral in terms of drop – they can be worn in zero-drop shoes.
How long do these insoles last? That depends. Many manufacturers recommend that you replace the insoles as often as you replace your shoes. Generally most running shoes should be replaced at 500 miles. I find that the BirkoSport by Birkenstock last pretty long – I’ve used them through four or five shoe replacements. Sole, New Balance, and Powerstep insoles tend to last a while (3 or 4 changes). Birkenstock and Sole both mold to your feet the longer you wear them. SofSole tends to only last one or two changes, but they are also less expensive. Generally speaking the more cushioned the insoles and the more activity they are subjected to, the more frequently you’ll need to replace them.
What’s the difference between inexpensive insoles and the more expensive ones? I believe you can get a really good pair of insoles in the $25 to $65 range. Custom insoles can run hundreds of dollars and many customers who’ve had custom insoles have shared with us that the $40 insoles they got from us were just as effective as the $400 custom pair they got from their doctor. The cheap insoles ($10 to $20 insoles at the drugstore) tend to not be much better than the insoles that come in the shoes to begin with. Among the insoles we offer, the materials used and the overall durability of the insoles set inexpensive and expensive insoles apart. I find that the more expensive the insoles, the longer they tend to last. Conversely, the less expensive insoles last a shorter period of time. Materials like carbon fiber, cork latex, tend to be more expensive and durable than gel insoles.
I cross-train and ride bikes too. Are there insoles made for biking shoes? There are definitely insoles specifically made for biking shoes. You can, however, use general purpose or running shoe insoles for biking shoes as well. The trick is to make sure that the insoles are low volume (since most biking shoes will not accommodate thick insoles) and that they have good cushioning in the ball of the foot (the part that is in contact with the bike pedal the most). Something like the currexSole RunPro can easily go from your cycling shoes to your running shoes if you are cross-training.
You may be asking why you would order insoles from Insoles and Beyond. Yes, you can find insoles in the foot care section of your local drugstore, sporting goods store, and running store. But will they be the right ones for your feet? Check out their lines of insoles and if you have questions, give them a call. On the right side of their page, is a 10% coupon and they offer free shipping in the U.S.
Disclosure: I have no financial involvement in Insoles and Beyond.
Today’s blog post is a little bit by me and a lot by Rebecca Rushton. Rebecca is a friend and podiatrist from Australia. I admire her work regarding blister formation and prevention. I follow her website and whatever she writes.
Having worked many events over the past years, I have seen hundreds of toe blisters. These may be at the tip of your toes, between your toes, or under your toes. They are very common, especially in ultras, adventure racing, and multi-day stage races. Understanding the causes of toe blisters, and ways to prevent them is important, not just for you but for your crew too.
Rebecca’s recent blog post details seven likely causes of toenail blisters. Here’s the link to Toenail Blisters.
- Shoes too small
- Shoes too big
- Nail shapes and deformities
- “Cocked-up” big toe
- Clawed toes
- Downhill terrain
- Long, thick or rough toenails
Make sure you sign up for Rebecca’s emails and you’ll get a free copy of her premium resource The Advanced Guide to Blister Prevention. The sign-up box is in the upper right corner of her web page. While you’re on her website, be sure to check out the rest of her content.