Today’s episode features Chiropractor and neurology expert, Dr. Mark Wetzel.

Dr. Mark is based in Nashville, TN and received his Doctorate of Chiropractic from Northwestern Health Science University in Minneapolis, Minnesota.  He has a diverse experience and is an expert in the neurology branch of chiropractic care and sports performance.

Last time on the podcast, Dr. Mark went in depth on extreme isometrics, their proper execution, function and physiology (particularly in regards to energy systems), as well as why the 5 minute mark is substantial marker in carrying out the training.  Extreme isometrics and all things related have been of substantial interest on this podcast, not only due to the athletic performance aspects, but also the tendon health portion of the work.

When it comes to extreme isometrics, however, it is much more common to see athletes doing them wrong than right.  Extreme iso’s, as well as much of Jay’s work has almost a mythical quality to it, so nuts and bolts shows that dissect the method are a lot of fun for me, and highly relevant.

On today’s show, Dr. Mark goes further down the isometric rabbit hole, highlighting not only technique, but practical results from his integration of the method into training a baseball team.  He’ll also get into the neurology of muscle compensation patterns, extreme iso’s and extreme slow work, a chat on central nervous system fatigue, breathing, and more.

Today’s episode is brought to you by SimpliFaster, supplier of high-end athletic development tools, such as the Freelap timing system, kBox, Sprint 1080, and more.







Key Points

What a “muscle compensation” is and what it means for athletic performance
How extreme isometrics and extreme slows play into (correcting) compensation patterning
The difference between “extreme slows” and traditional 5 to 10 second eccentric training
Mark’s case study work using a series of long isometric holds with a varsity baseball team
When the work of extreme isometrics/extreme slows is finished and you can move beyond them in training
Concepts on tracking central nervous system fatigue
The importance of the eyes in monitoring CNS fatigue
How to perform correct breathing
Ideas on tapering, the modern ideology versus a more progressive view




“When I think of a compensation, it’s altering your movement to make your body breathe more efficiently”

“A compensation: your body is altering homeostasis to make sure you survive in that given moment”

“Our lifestyle is encouraging (muscle) compensations”

“At a high velocity is when your compensation will come out, if we are going slow and steady, we can catch it before we injure ourselves”

“When you look at an isometric, you can tell where their body is immediately faulty (what will materialize in dynamic movement such as sprints)”

“You can use an extreme slow to learn exactly where their compensation is”

“I’ve come to the conclusion that the “perfect position” doesn’t really exist”

“The goal of an isometric is to be as centrally stabilized as possible… you can stabilize a LOT in the lunge, I think that’s what makes the lunge to beneficial you can get a whole body contraction in the lunge”

“If you can hold 5 minute (isometric positions) then we can progress into the weight room”

“We used wall sits, lunges, iso crunch, single leg raise, scap hang, pushup, and prone glute ham where you are laying on your s

“When you do an isometric, you need to be really in tune with yourself and you need to understand what is going on with your body and why you are doing an isometric, and why you are constantly engaging and pulling yourself into position, and if you don’t understand why you are doing that, then you never really should progress out of isometrics”

“An isometric, the purpose to me is that you are eliminating compensations”

“Basically, CNS fatigue is just a fancy word for “too stressed””