Physical Therapists Using Clinical Analysis To Discuss The Art And Science Behind Running and The Stuff We Put On Our Feet

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DOR Podcast #97: All of Your Saucony Endorphin Speed 3 Questions Answered

Today Nate & Matt review the much-anticipated Saucony Endorphin Speed 3! The new version is, in our opinion, better than ever, boasting a wider platform, more stability, and the same bouncy PWRRUN PB midsole foam. They also tackle a bunch of listener questions about the Speed 3 including: how soft is it? How's the heel stability? How does it compare with the new Saucony Tempus?

Listen to This Week's Podcast Here!

Direct Links: Apple | Spotify | Anchor

PS: Full Endorphin Speed 3 review here.


Sponsor: Karhu!

This episode sponsored by Karhu. You might know they make a collection of running shoes, but for before or after the run, you can be sure to look good with Karhu's Lifestyle collection. They've recently released fresh seasonal colors to ensure you're stylin' going to and from the track. Go to and use promo code DOR2022 at the time of checkout to receive 20% off from the lifestyle assortment when you purchase $100 or more.

0:00 - Introduction
0:54 - The Subjective: What makes a shoe soft for you?
09:40 - Saucony Endorphin Speed 3 Review
14:11 - Is the Speed 3 softer? How does it perform at slower paces?
18:00 - How stable is the Speed 3?
28:16 - How does the bounce of the Speed 3 compare to the Rebel V2 and Novablast?
31:51 - Why is stability important to us?
36:38 - How does the Speed 3 compare with the Tempus?
39:55 - Is there anything for the next version of the Speed to improve on?
44:43 - Do we measure the durometer of midsoles?
47:59 - Wrap-up

Science Blog: What does lateral heel wear mean?
By Chief Editor Matt Klein

Excessive lateral forefoot wear is a fairly common thing that I see. Usually this means that someone is supinating or inverting excessively during toe-off.  This could come from a fibularis longus weakness and the body is avoiding putting pressure on the first metatarsal.  It could come from excessive tightness of the calves or the posterior tibalis.  It could also be coming from a forefoot striker landing very hard on the lateral aspect of the shoe, which is fairly normal for their gait.  This is similar to landing on the posterior lateral side of the heel.  Most people will land on the outside first to prepare themselves for pronation, which again is a normal method of shock absorption.

While this is only briefly mentioned in the research, I often look for asymmetrical wear patterns.  Generally more wear on one shoe versus the other makes me suspect either weakness, abnormal biomechanics or possible leg length discrepancies.  Most individuals will land harder on sides that have poor eccentric strength and will instead use joint loading instead of muscle loading for shock attenuation.  While asymmetry to a certain degree in the human body is normal, excessive is not and can (but not always) be predictive of injury risk.  However, this can also occur if you tend to run or turn asymmetrically in some fashion.  An example being if you run on a track exclusively in one direction.  You are constantly going one direction, which places asymmetrical loads on each side of the body. That is why I am a huge proponent of doing workouts both ways on the track for athletes to reduce risk for asymmetrically induced overuse injuries (a common issue I see is sacroiliac joint issues, but this is anecdotal).   Another great example of this is running on the same side of the road all the time.  The cant of the road acts like a wedge and will cause asymmetric loading if you don't find a level surface or make sure you spend equal time on the other side. 

Recent Episodes

#92: Runner's Knee 101
#93: "Our 3000 Mile Journey"
#94: Surviving the Summer Heat
#95: Science of Designing Running Shoes
#96: Science of Biomechanical Shoe Testing

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