Can't wait for the weekend!
Let me start by saying that I don't stretch before working out and only a little bit during and/or after. Nevertheless, at 50 I can still touch my palms to the ground. Anyway, I did a little hunting and found this:
Jim and Phil Wharton, trainers of a number of Olympic and professional athletes and co-authors of The Whartons' Stretch Book, are proponents of a slightly different angle on stretching. They call their method Active Isolated Stretching (AIS).
AIS combines some principles of active, dynamic and facilitated stretching with a slightly different philosophy. The Whartons really focus on stretching as a means to increase range of motion. “The key is we only work within our own range of motion,” says Phil Wharton. “It's a progression.”
As with active and passive stretching, the terms agonist and antagonist are important for understanding AIS.
Here's how AIS incorporates traditional techniques:
The Whartons believe that the stretch should begin with contracting the muscle that is opposite the one you want to stretch the agonist. This relaxes the antagonist and makes it ready to be stretched.
They also encourage the use of an experienced partner for assisting in stretches.
They support the notion that stretching should never hurt.
Here's where AIS differs from the mainstream:
The Whartons encourage holding the stretch for only two seconds, because they believe the myotatic, or stretch, reflex kicks in at that point.
They believe that triggering the myotatic reflex is so detrimental to muscles that you should be stretching only before it kicks in.
They also suggest doing 10 repetitions of each exercise.
Active Isolated Stretching: a little something different
Though all the exercises in AIS are active, you do you use your hands and sometimes a rope to assist the very last part of the stretch. Partners in AIS do not push you into your stretch, but just gently assist at the end of the stretch.
The Whartons have trained many elite athletes. How did AIS help their performance? Both the Whartons and other experts agree that pinpointing one aspect of training that improved performance is difficult. However, there are some cases where AIS seems to have helped.
While in training for the Olympics, sprinter Michael Johnson was not able to get full power off the turn in the 200 meter race, because his hip rotator muscles were tight and, therefore, unable to take his legs through the full range of motion on the turn. Johnson used AIS techniques along with his existing training regimen and was able to unlock the muscles and tendons in his hips to get full power in that turn. He then broke the world record for the 200-meter race in the 1996 Olympic trials and won the gold medal in the 200- and 400-meter races in the 1996 Olympics Games in Atlanta.