Stretch To Increase Strength...
I have always been a huge advocate of stretching between every set when training. Not only for full range use of the muscles and increased flexability and strength at the weakest point..but also to aid in decreased muscle soreness. This article gives another suggestion to between set stretching that will really make those with "old school" thoughts re-think a bit...

"There is evidence to suggest that stretching can increase strength,
if you add weight to it.
Follow this advice from Joel Marion, C.P.T., a trainer in Burlington, N.J.,
and you'll increase your pullup power.
HERE'S WHAT YOU DO:
After your first set of pullups, rest, and then grab onto the bar again as if you were going to begin another set. Just hang there for 15 seconds, concentrating on the stretch in your lats. Now let go of the bar and rest 30 seconds. Afterward, begin your next set of pullups-we bet you'll be able to get a few more reps, or, if you're doing weighted pullups, you'll be able to add a little more weight. Stretching a muscle with resistance (in this case, your body weight in a dead hang) creates elastic energy in the muscles and tendons that's stored until your next set. When you begin your next pullup, the energy will be released and propel you upward. "

Article by: Sean Hyson of Men's Fitness