It’s well known among experts but not the hoi poloi that some folks don’t respond to exercise programs with an increase in fitness. And if you’re not responding, your exercise program may be a massive waste of time.
Check out this article at NYT:
“These data suggest that “there is no one-size-fits-all approach to exercise,” says Brendon Gurd, an associate professor of kinesiology at Queen’s University who oversaw the study. “But it does seem as if there is some size that fits everyone.”
The question is how to determine which form of exercise best fits you [endurance versus high-intensity interval training].
The answer, Dr. Gurd says, is simple trial and error.”
Read the article for a three-week test that may tell you which is best for you.