Len Kravitz, PhD
Len Kravitz, PhD, CSCS, is the program coordinator of exercise science at the Uni-versity of New Mexico, where he has received the Out-standing Teacher of the Year and Presidential Award of Distinction. His third book is HIIT Your Limit (Amazon 2018).
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Type 2 diabetes (T2DM) accounts for >90% of people with diabetes. Roughly 40.1 million people have diabetes in the U.S., with 11 million, or over 27% of people unaware they have the condition (CDC, 2026). It is a chronic metabolic disorder of high blood sugar that develops from a complex mix of genetic, biological, behavioral…
Introduction: Hypertrophy Matters! Personal trainers and fitness professionals often need to discuss the importance of muscle hypertrophy (i.e., diameter size increase of muscle) with clients. All too often, clients become preoccupied with the singular aspect of hypertrophy commonly observed with exercise enthusiasts who are attempting to enhance their body’s muscular development, as in the sport…
While HIIT is popular, there are some controversies surrounding it. This column looks at HIIT research to bring some clarity.
Resistance training does much more than build strong muscles. Research has confirmed that resistance training affects metabolism, too.