VO2max intervals

The least fit men died at five times the rate of the fittest.

Who it's forAny man who trains hard in the gym and never does anything that leaves him gasping.

The item

Three squares: proven in human trials. Two: a strong signal. One: early human data. Striped: the trials disagree.

Emergency: call 911.

I am not a doctor. This is not medical advice. This is self-education. Talk to a physician who has your history before you change anything.