2015 Seattle Sounders Sports Science Seminar

I am excited to announce that I will be speaking at the 2015 Seattle Sounders Sports Science Seminar.

Dave Tenney, High Performance Director for the Seattle Sounders, has done a fantastic job of growing this event over the past five years. He always brings in great international speakers and this year is no different. Attendees often include professionals in the NFL, NBA, MLS, EPL, and Olympic Organizations as well as independent strength coaches.

This year’s event will be held  Tuesday June 9 through Thursday June 11. The event grows in attendance each year and always sells out, so be sure to sign up as soon as possible. Registration information and the current list of confirmed speakers can be found HERE.
(Note: Dave is still adding more speakers.)

Hope to see you there!

Random Thoughts On Coming Back From Injury

Injury is a part of sport and one of the most difficult times in an athlete’s career is often when they are trying to return from injury and regain function to allow them to perform at the highest level. A lot goes into preparing an athlete who is coming back from injury from all parties involved – rehab professional, strength coach, sport coach, and the athlete themselves. I thought I’d record a few of my random thoughts on this topic from the standpoint of strength and conditioning. I am not a rehab professional; however, a strength coach should be instrumental in assisting athletes who are rehabbing and should work with the rehab professional to make some of the thoughts below build into a solid program:

1. Don’t get out of shape

The best way to get in shape for your sport is to not allow yourself to get out of shape. Too often, when an athlete gets injured, there is this feeling that they must be “shut down” from all activity. This ends up being problematic because not only is the athlete being put into a state where, psychologically they feel like are “broken”, but the athlete is also losing valuable time that they could spend training around their injury (while it is being treated) to not lose fitness or potentially improve in other capacities.

2. There needs to be a plan

Oftentimes the strength coach doesn’t feel comfortable dealing with an athlete that is injured and thus provides a substandard program, which doesn’t adequately achieve the needed training stimulus. Additionally, the medical staff may not be knowledgeable about training means and methods to construct a proper training program for the athlete. Thus, the athlete is put into a position where they are unable to succeed. Having a plan leads to success. Knowing where to go with the training process comes from everyone being on the same page and addressing the athlete’s needs as an individual. This is where I firmly believe that Charlie Weingroff’s Training = Rehab makes the most sense. It isn’t about exercises, it is about principles. If you understand how to lateralize and/or regress your best program via a principle based system the athlete never loses out. The athlete will achieve what they need while rehab is taking place. In essence, training never stops for the athlete.

3. Rehab needs to progress and not be soft

Much of the training approaches being marketed to both clinicians and trainers these days are centered around what I would refer to as “soft”. The exercises are typically done in a very safe environment (on the ground), at a slow and controlled speed, and limit the intensity being placed on the body. I am all for progressions and simple to complex, slow to fast, and low intensity to high intensity, definitely makes sense. However, it is important to make sure those progressions actually take place. Too often I see people trying to return an athlete back to sport doing very slow and passive exercises and the clinician is often happy that the athlete can perform these movements pain free. The only issue with this is that those movements have very little carryover to the athlete running down the field/court/track at full speed!! To return someone back to sport you must first start by understanding the sport and the physical demands the athlete must be able to tolerate. Having a well constructed needs analysis is the first step that all strength coaches should make when they start working with a sport. Write it down, refine it as you learn more, and use it to help develop programs that properly address the needs of the sport. If the idea of rehab/training stops at clam shells, x-band walks, crawling patterns, and planks, there is probably going to be problems later on down the road when the athlete is going to have to do something more dynamic. Those exercises sound more like a starting point to me. In fact, those exercises are probably best served as a staring point in the warm up, as they do not reflect the necessary loading that needs to take place for an athlete to return to play. The tissue needs to go through the proper stress and strain in order to adapt and allow for continued progress.

4. Assess & Monitor

I purposely left out eval here because I believe that all rehab professionals do a proper evaluation of the athlete when they are injured. Assessment really has more to do with assessing where the athlete is physically as well as assessing what the demands of the sport are, and how the athlete should be trained to meet those demands. Monitoring is a key aspect often overlooked in the rehabilitation of an athlete. The only way to know whether or not the athlete is improving is to monitor them. This doesn’t just mean auditing painful patterns or movement dysfunction. Monitoring should go a step further and be inclusive of other physiological systems, in addition to the musculoskeletal system, to ensure that the athlete is not losing fitness during their injured period. This will allow you to make informed decisions about how the athlete is progressing (or not progressing).


These are just some random thoughts I put down based on reading various discussions on social media about training and rehab. At times, I feel like our profession has lost its way as discussions often shift towards the rehab side of things or “fixing” people. Movement is only one capacity and, while important, should not be emphasized over any other capacity. All physical capacities should be taken into consideration, particularly when an athlete is returning to play from an injury. The strength coach should develop a principle based approach that is specific to the needs of the sport and should work with the rehab professional in order to ensure that the athlete is provided the proper training stimulus at the right time.


2015 Sports Rehab Expert Teleseminar

One of the things that I get really excited about at the start of every year is the Sports Rehab Expert Teleseminar.

Joe Heiler always does a fantastic job getting some of the top rehab professionals from around the world and this year is no different. This year he has an awesome line-up (one speaker interviewed per week) of people like:

  • Charlie Weingroff
  • Donald Chu
  • Derek Hansen
  • Rob Panariello
  • Gary Gray
  • and several others…

For full details about the event and sign up information (it’s FREE!) check out THIS PAGE.

Happy learning!

Comparing Barry Sanders and Emmitt Smith

Barry Sanders and Emmitt Smith are arguably two of the greatest running backs of all time. They dominated the 90s with their running styles and were both eventually enshrined in the NFL Hall of Fame. Fans and media folk have often debated “Who was better as a running back”. It is a bit of a tough question to answer. First, stating the obvious, Emmitt played an extra 5 years than Barry. Emmitt played 15 seasons while Barry retired after just ten seasons, most people feeling he cut his career short. Secondly, Emmitt was on some exceptional Cowboys teams and had a supporting cast of great offensive linemen, a solid blocking fullback, and a hall of fame quarterback with great receivers, which set him up for opportunities that weren’t always present for Barry (the Lions only finished first in the, what was then referred to as the NFC Central, twice during Barry’s ten year career).

But what if Barry had played the extra 5 years that Emmitt did? Barry ended his career with 15,269 yards to Emmitt’s 18,355 career yards. How many more could Barry have gotten?

Side Note: I removed receiving yards from this analysis as I only wanted to look at rushing yards. Barry had 2,921 career receiver yards while Emmitt had 3,224 career receiving yards, most of those coming in his first nine seasons with the Cowboys.

First, let’s look at some visualizations of the career both of these superstars had. We will look at their yards per season, their average yards per attempt each season, and their average yards per game each season.

Screen Shot 2015-01-04 at 7.30.30 PM

Screen Shot 2015-01-04 at 5.46.02 PMScreen Shot 2015-01-04 at 5.46.54 PM

Looking at the graphs, it seems like Barry was a more consistent runner than Emmitt and, after the age of 27, Emmitt’s production began to dip a little bit, while Barry stayed relatively consistent. During Barry’s 10 year career, he averaged 4.98 +/- 0.6 yards per attempt,  99.9 +/- 14.2 yards per game, and 1,526.9 +/- 270.8 yards per season. Looking at the first 10 years of Emmitt’s career, he averaged 4.3 +/- .46 yards per attempt, 90.3 +/- 17.6 yards per game, and 1,396.3 +/- 267 yards per season.

In the last 5 years of his career, Emmit averaged 3.62 +/- 0.5 yards per attempt, 59.42 +/- 19.9 yards per game, and 878.4 +/- 362.6 yards per season. It is important to remember that Emmitt missed six games during the 2003 season due to a fractured shoulder blade, causing him to only get 90 attempts that year (a far cry from his average of 269 attempts per year that he got during that time period, after removing the 2003 season from the data set).

Equivalence Coefficient

So, how much better would Barry have been had he played the same amount of games that Emmitt played – what amounts to 73 extra career games (since Emmitt missed 6 games in 2003, 2 in 2001, and 1 in 2004)?

In baseball, Sabermetricians will sometimes use the Equivalence Coefficient (EC) as a means of projecting out performance in specific metrics given an equivalent scenario.

First, we determine that, had Barry been given 73 extra games in his career, he would have had approximately 1461 total attempts (based off his previous career numbers). This allows us to calculate Barry’s EC:

1+(1461/3061)*1.00 = 1.477295

By multiplying this coefficient by Barry’s career total yards, 15,269 yards, we project that, given 73 extra games (or 1461 extra attempts) Barry would have rushed for a career total of 22,557 yards (4202 yards more than Emmitt).

Of course this assumes that during these extra 73 games Barry is 100% of the player he was in the past. Oftentimes, people will talk about the the magic age of 27 representing a “cliff” for running backs where their performance begins to drastically decline (it seems like Emmitt may have started to decline around this age). Looking at Barry’s charts above, it certainly doesn’t look like he was showing signs of decreased performance at the age of 27 and there is no reason to believe that he wasn’t going to be the same player in those next 73 games that he was in the previous 153 games. However, let’s assume that perhaps Barry is not the same player in those next 73 games. Looking at Emmitt’s production in his final 4 seasons (I took out the injury plagued 2003 season where he only had 90 attempts in 10 games), Emmitt saw a 16% decrease in average yards per season, a 6% decrease in average yards per attempt, and a 15% decrease in average yards per game. So, let’s say, hypothetically, that during the next 73 games, Barry would be 10% less of the player that he was in the first 10 years of his career (a 10% decline in his overall performance). If this is the case, Barry’s new EC is calculated to be 1.429566 and his projected total for career yards would have been 21,828. That is 3,473 more yards than Emmitt Smith had in his career.

What does it all mean?

It is fun to play with projections like this. This doesn’t necessarily mean that Barry was a better running back (remember, I didn’t factor in receiving yards) but it certainly does show the incredible skills that Barry had and what he was able to accomplish in a career that he ended too soon (in the opinion of many). From a sports science/strength & conditioning perspective, projecting out performance allows us to understand the potential that our athletes have and what their projected performance may look like given a decrease in their overall output. This is important in a team sport as the chaotic nature of performance is difficult to tie back to the S&C coach (it certainly is not as easy to make the connection as it is with an individual athlete sport, such as track and field, swimming, or cycling). With this information we can begin to grasp the value that our programs may have on prolonging an athlete’s career by keeping them healthy and on the field/court where they can perform at the highest level, helping them to maintain their performance without seeing as large a decline with age as other athletes may see.

Massage & Muscle Stiffness

One of the main reasons that athletes seek out massage is to decrease the muscle stiffness they feel due to intense training and competing. A recent paper by Crommert and colleagues (Scand J Med Sci Sport, 2014) evaluated the effects of massage on muscle stiffness in the medial gastrocnemius of eighteen healthy volunteers.


Seven minutes of massage was performed on the gastrocnemius of one leg for each subject – 2min of effleurage, 2min of petrissage, 2min of deep circular friction, and 1min of effluerage – while the non-massaged lower leg served as the control. Immediately following massage, the subjects rated their level of pain experienced during the massage on a 0 to 10 scale (0 = no pain, 10 = worst imaginable pain).

Muscle stiffness was measured using shear wave elastography to quantify the shear elastic modulus (stiffness) at the midpoint of the medial gastrocnemius muscle belly at three time points: before massage (baseline), immediately following massage (follow-up 1), and after 3min of rest following follow-up 1 (follow-2), in both the massaged and non-massaged legs.


  • Medial gastrocnemius stiffness was significantly lower immediately following massage (follow-up 1) compared with baseline and following rest (follow-up 2).
  • There were no significant differences found between baseline and follow-up 2 in the massaged leg, indicating a return to normal muscle stiffness.
  • Average level of pain rating was 1.3 +/- 1.6 and there was no correlation found between perceived pain level and a reduction in muscle stiffness in the massaged leg at follow-up 1.


Massage appears to reduce muscle stiffness; however the results are short lived with a rapid return back to baseline levels.

Practical Applications

The authors suggested four potential mechanisms that may lead to a decrease in muscle stiffness from massage:

  1. A decrease in motoneuron excitability due to general relaxation.
  2. Manual pressure and stretching leading to a breaking apart of stable cross-bridges between actin and myosin filaments, which are spontaneously formed while the muscle is at rest.
  3. Increased intramuscular temperature from the massage.
  4. The possibility that all of these mechanisms are working together, rather than any one of them working in isolation.

These theoretical mechanisms for why manual/touch therapy works are interesting and most likely not the only mechanisms at play. I’d be inclined to think that #4 above is the most likely scenario, along with other potential influences.

The fact that massages influence on muscle stiffness was short lived is interesting. From a practical standpoint, when applying this stuff to athletes for specific purposes of addressing muscle tone and stiffness, there are a few things I think about with regard to the outcome in this study:

  • The length of treatment may have been too short to produce a more longer lasting effect. Maybe seven minutes isn’t enough? One proposed mechanisms that led to a decrease in muscle stiffness was general relaxation from massage. While not measuring stiffness, Arroyo-Morales have done some studies looking at massage therapy and autonomic changes – a shift towards a more parasympathetic state – leading to greater relaxation. The two studies they performed used 40min massages following intense cycling exercise in order to achieve this result.
  • Maybe the techniques used are to passive in order to produce longer lasting changes? As I discussed a few weeks ago, there might be different massage techniques for different recovery purposes. If the goal is to improve some sort of functional outcome (E.g., decrease muscle stiffness and/or improved ROM) maybe passive techniques, like the ones used in this study, need to be coupled with more active techniques which force the client to be an active participant in the treatment. This puts the client in the driver seat and might allow their brain to be more receptive to the changes taking place and cause them to be more longer lasting.
  • Finally, maybe the treatment needed to be followed up with active movement in order to “make it stick”? In the past, I have written about the idea that massage might be useful to “open the window”, to help decrease threat or increase awareness for the client, and then should be followed up by movement therapies in order to teach the brain to move and be strong through the new ROM on its own. Perhaps the reduction in muscle stiffness, found in this paper, would have been longer lasting with movement therapy? Certainly a short treatment time can be beneficial in certain situations, depending on your goal. Grieve and colleagues found that a 10min treatment consisting of trigger point therapy and light stretching was adequate enough to produce a significant increase in ankle dorsiflexion in recreational runners. In a situation where the goal of treatment is some sort of functional outcome, rather than more recovery based, these short bouts of massage therapy may be enough to produce a result and then should be followed up with some sort of movement based therapy.

Massage therapy appears to impact the body on different levels via different mechanisms. This study evaluated muscle stiffness and found that seven minutes of massage was effective at decreasing muscle stiffness, however, the results were short lived. From a practical standpoint, the fact that massage decreased muscle stiffness is promising and there might be other factors that could enhance the effect of the positive change in muscle stiffness seen in this study. In an actual treatment setting we rarely (or never) rely solely on one single modality or approach and usually a variety of different approaches are stacked on top of each other, depending on the intended goal of the treatment. When used in conjunction with other modalities, the findings from this study may potentially be augmented.