When people train for marathons, a lot of extra endurance training is involved.
The question of whether years of intense endurance training might, just possibly, be harmful to the heart is hardly new.
This study adopted RT-PCR technique to observe the change of express of gene of rats' ANP and BNP during 11 week's moderate intensity endurance training;
Take the exercise theory. If play evolved to build muscle or as a kind of endurance training, then you would expect to see permanent benefits.
Their meeting will occur on a random basis, where the school's hungriest students will start with "stretching and a warm-up lap", followed by "speed training" and "endurance training".
