Super Jay Five wrote:
The problem with these types of studies is they talk about "stretching" and that is not really a hard core scientific term.
It's scientific enough to mean stretching the muscle instead of fixing the structure around it so it doesn't tighten up in the first place.
Muscles themselves are very flexible, particularly during sleep. It isn't until you wake up that the nervous system takes over and sets the tension and range of motion in each muscle. When people stretch, when that poster's dog stretches, after waking up, it's not about tight muscles, it's about the nervous system getting its bearings and setting the parameters for the kinetic chains it will use during the day. Stretching after standing up is the same kind of thing, the nervous system says, ok, new activity coming up, make sure everything's ready. If the nervous system did not do this, the muscles would use too much range of motion, decreasing efficiency and risking injury to tendons and ligaments.
Simply warming up properly should set the range of motion to the right level. If it doesn't, it points to a biomechanical pathology that athletic stretching does nothing to fix and only weakly counteracts.