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Apex Stretching and Hand Grip Strength:

Much can be said about the benefits of stretching – there are at least a couple reasons to do it!  And sure there’s been scientific evidence that stretching reduces the level of discomfort/soreness (Weppler et al, 2012) but there’s another side to that coin.

One research done March of this year looked at the effects of static stretching more thoroughly.

Static stretching is often utilized before and after the exercise or in this case both. While some claim it improves performance other claim it’s to prevent injuries. The majority of research in the field agrees on one thing – the effects of static stretches translate into strength loss more often than not!


Research of Eurico Peixoto Cesar and colleagues at the Laboratory of Biomechanics and Exercise Physiology tested this finding on Brazilian jiu-jitsu athletes specifically.


In order to get accurate estimates they tested grip strength dynamic and isometric kimono grip strength, range of motion along with passive torque. The static stretching routine consisted of the subject being seated with an arm close to the body, elbow at approximately 90 degrees while the researcher conducted the routine gradually until reaching the utmost discomfort point.

The results were conclusive – static stretching routines does increase Range Of Motion but they also reduce handgrip strength significantly, and the effect stays there!

A conversation on Vasper and Testosterone with A Pro Basketball Team

A conversation on Vasper and Testosterone with A Pro Basketball Team

Hello Art,

I was told someone at Vasper had told you to call us about some of the testing we have done pre/post use of Vasper. We did several small pilot studies on individuals with issues related to fatigue, sleep disturbances, etc.; something that athletes certainly suffer from when they are traveling and playing back to back games as the NBA does.

We have tested athletes in the NBA and see that when their anabolic hormones like testosterone begin to fall it increases their chances of injury. Testosterone is an important hormone for health of muscles, cardiovascular system, and brain function. From the basketball perspective, healthy levels of T are important for stamina (4th quarter performance), optimal eye-hand coordination (percentage of shots made in our world today and ability to toss a spear accurately into an animal 10,000 years ago), and probably most importantly, the belief that you can and will win (T activates brain sites that make men, and women, competitive). Winning increases T and is associated with winning streaks. Losing decreases T and is associated with losing streaks. Losing even decreases T levels in spectators.

As a scientist I see that low T, which is caused by over exercising and inadequate rest and regeneration leads to injury, which can be very expensive at all levels. Preventing these injuries is key to increasing the odds of winning. Keeping T levels within healthy ranges is key to staying healthy and preventing injuries.

The simple natural ways to keep T high are to: 1) reduce stressors (emotional-psychological, physical-overtraining) that increase levels of stress hormones (cortisol and adrenalin/noradrenalin), which suppress anabolic hormone levels (T and growth hormone-GH); 2) eat right at the right time of day; and 3) get a good nights sleep. If you don’t sleep well your T may be only half of what it should be. Oh yes, and 4) win. Winning increases T, losing decreases it.

In my limited experience with Vasper I found that it increased levels of T and IGF1 (marker for GH). We don’t know the mechanism, and it may be something as simple as enabling a better nights sleep.

Hopefully this isn’t too technical and you find it useful.

If you want to get baseline hormone levels on athletes we certainly can do that in easy to collect body fluids-saliva, urine dried on filter cards, or blood drops from the finger collected on filter cards. If you want more information on this please go to our web site at


David T. Zava, PhD
Owner/Founder/Chief Research Scientist
ZRT Laboratory