Cardio Revolution: Melding an Old Protocol with a New Tool – Part I During the 1990s, I had the great fortune to become an aerobic disciple of Dr. Leonard Schwartz, medical doctor, psychiatrist and exercise genius. Len was…


Cardio Revolution: Melding an Old Protocol with a New Tool – Part I During the 1990s, I had the great fortune to become an aerobic disciple of Dr. Leonard Schwartz, medical doctor, psychiatrist and exercise genius. Len was…