Something seems to have happened to the original version of this thread that rendered it inaccessible so I???ve deleted the original but will restart the thread since it seemed to be a good one.
The original thread was started by JohnWiggler who asked if stretching was as important as many make it out to be. To this, several people highlighted some of the benefits and I countered with some of the drawbacks.
The benefits mentioned were:
*Increased range of motion and thus increased stride length
*Increased recovery
The drawbacks I mentioned were:
*Decreased power output
*Decreased maximal strength
*Altered sensitivity of muscle proprioceptors
*Increased possibility of joint laxity
*Increased possibility of tendon and ligament creep
*Possible increased likelihood of injury
*Possible occurrence of muscle soreness
*Possible occurrence of muscle damage
The following is some of the original thread that I had copied and pasted to a Word document in hopes of responding to the post while away from internet access:
[i]Originally posted by Dark Knight[/i]
[quote][i]Originally posted by QUIKAZHELL[/i]
Mike,
while i agree with what you are saying as research has shown, i still feel static stretching post workout is very important and since it aids in recvoery there are no negative aspects such as the ones you mentioned (during post workout).
I???ll take a stab at this:
Static stretch post exercise to aid recovery and to get muscle back to resting length is a good idea.? I do believe there is a minimum flexibility that all athletes must maintain.[/quote]
Here is my response??????
I agree that static stretching post workout and even in some instances post warm-up may be beneficial for reasons ranging from physiological to psychological. I also agree that there is a minimum level of flexibility needed for athletic success but I think that MOST athletes already have the necessary level of static flexibility while quite a few lack this level of dynamic flexibility.
Before I go further though, I have a couple things which need to be cleared up. First of all, increased range of motion through flexibility training is not necessarily the sole result of a lengthened muscle. In fact, increased range of motion can actually be achieved when a muscle is SHORTENED. How is this possible you???re probably asking yourself???..it???s possible due to the fact that range of motion is affected not only by the contractile components of a muscle (muscle belly itself) but also by the elastic components (tendon, muscle membranes, etc.). As such, increased range of motion could and often is achieved when the contractile component of a muscle is shortening or remaining the same length and the elastic components are lengthening (possibly to a greater degree than the contractile components are shortening).
The second thing that needs to be cleared up is that as far as I know there is no evidence indicating that stretching assists in recovery. This is in spite of the fact that this belief has been widely popularized by both coaches and clinicians. On the contrary, I am aware of several research studies indicating that stretching has NO effect on recovery. And while I am not going to ignore the anecdotal evidence indicating that stretching can enhance recovery, I do look at it skeptically. Recall that not too long there was plenty of anecdotal evidence supporting the notion that stretching immediately prior to an event could improve performance. This anecdotal evidence has since been proven to be at best only conditionally correct and at worst outright wrong. It is likely that the same may be true for the stretching-recovery theory.
The third thing that I???d like to address is that no one has any accurate idea what ???normal resting length??? actually is. This is because muscle length is dependent on such things as body temperature, time of the day, performance of prior activities, state of arous
al, etc. As such, there is no true or accurate standard mark indicating ???normal resting length??? because there are so many variables which affect the length of the muscle that its ???normal length??? can never be attained.
In light of these points static stretching is often not doing what most people think it is doing. By stretching a muscle we are not necessarily “returning it to normal resting length.??? In fact in many cases if the person does not know how to adequately relax the muscle while they are attempting to elongate it, they may in fact induce muscle shortening due to activation of the muscle spindles. Also, as Todd hinted at (in the original version of this thread), even when static stretching is most effective, it should perhaps best be thought of as neuromuscular (relaxation) training rather than muscle elongation training. This is because while it is very well possible to stretch the contractile component of the muscle-tendon unit, it often requires special techniques and experience at learning to relax the muscle.
Finally, I???d like to go back to the stretching-recovery theory. The common thought behind the stretching for recovery theory is that it can ???open up??? nutrient and waste pathways to allow for better transport of these materials and facilitate quicker recovery. While this sounds great in theory, I’ve never actually seen anything outside of the realm of Flex magazine that indicates that this actually happens. If someone knows of evidence that I’m overlooking please let me know. One possible reason for this lack of supporting evidence may be because of the above mentioned muscle-tendon relationship. That is, the increased range of motion commonly associated with muscle lengthening (and “opened up??? nutrient and waste pathways) may actually not be fully representative of muscle elongation. It may in fact be partly due to elongation of the elastic components. Elongated elastic components would not be expected to directly contribute or influence the transport of nutrient and waste byproducts to and from the muscle.
Please note that I do use static stretching in my programs and do feel that it has a role in a balanced program. I just feel that many of the reasons given and methods of implementing stretching into programs is often for unproven or altogether wrong.