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Len Kravitz

Len Kravitz, PhD is a professor and program coordinator of exercise science at the University of New Mexico where he recently received the Presidential Award of Distinction and the Outstanding Teacher of the Year award. In addition to being a 2016 inductee into the National Fitness Hall of Fame, Dr. Kravitz was awarded the Fitness Educator of the Year by the American Council on Exercise. Just recently, ACSM honored him with writing the 'Paper of the Year' for the ACSM Health and Fitness Journal.

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Article Archive

Does Carbohydrate Mouth Rinsing Improve Exercise Performance?

January 8, 2016

At the annual meeting of the American College of Sports Medicine, thousands of professionals from around the globe in more than 70 disciplines exchange research, present new clinical techniques and share scientific advancements in public health, physical activity, sports medicine and exercise science. This article covers just one of six studies reviewed.

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How Many Steps per Day Are Needed to Elicit Weight Loss in Obese Clients?

January 5, 2016

In May 2015 in San Diego, ACSM’s 62nd annual meeting brought together thousands of professionals from around the globe in more than 70 disciplines to exchange research, present new clinical techniques and share scientific advancements in public health, physical activity, sports medicine and exercise science. This article covers just one of six studies reviewed.

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How Effective Is Battle Rope Training for Improving Cardiorespiratory and Muscular Fitness?

January 5, 2016

The study:

The Energy Cost of Battle Rope Exercise. J. Verdisco et al., Adelphi University, Garden City, New York.


Battle rope (BR) training is very popular in personal training and small-group training programs. BRs generally range from 1 to 2 inches in diameter and are approximately 30–50 feet long. BR workouts typically involve wrapping a single BR around a fixed anchor point. Thus, a 50-foot battle rope means the exerciser has 25 feet in each arm.

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New Clues to Prevent Weight Regain

December 10, 2015

Cardiovascular exercise and resistance training are essential to successful weight management. However, there is a complex, unclear relationship between exercise training during weight loss and free-living energy expenditure after weight loss (Hunter et al. 2015).

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Is Tart Cherry Juice the New Super Recovery Drink?

September 15, 2015

Emerging research suggests tart cherry juice has a unique blend of
powerful anti-inflammatory and antioxidant agents that help athletes and
exercise enthusiasts recover faster from exhaustive exercise. This
discovery is attracting growing interest among fitness professionals.

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Six Takeaways From the ACSM Annual Meeting

August 15, 2015

Every year, the science of sports medicine gets better at determining the effectiveness of specific exercise programs—a point made clear at the latest annual meeting of the American College of Sports Medicine.

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The Science of Suspension Exercise

June 15, 2015

Suspension exercise combines body weight and anchored, seatbelt-like straps to provide an alternative to free weights and machines. The question on a lot of trainers’s minds is whether these strap-based training systems work as well as more traditional resistance training tools. Though research into this question has been somewhat sparse, studies are starting to paint a picture of effective ways to integrate suspension exercise into a workout program.

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Reciprocal Superset Training Burns More Calories

May 7, 2015

Kelleher, A.R., et al. 2010. The metabolic costs of reciprocal supersets vs. traditional resistance exercise in young recreationally active adults. The Journal of Strength and Conditioning Research, 24 (4), 1043–51.

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Health Benefits of Mediterranean Diet

April 21, 2015

Crous-Bou, M., et al. 2014. Mediterranean diet and telomere length in Nurses’ Health Study: Population based cohort study. British Medical Journal, 379, G6674; doi: 10.1136/bmj.g6674.

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6 Key Factors That Predict Weight Gain

April 17, 2015

Fitness professionals expend considerable energy helping people to lose weight, but there’s another way to view this challenge: What are the main factors that cause people to gain weight??
Research shows that two-thirds of Americans are overweight or obese (Ogden et al. 2014), a health condition associated with hypertension, cardiovascular disease, diabetes, depression and various cancers (breast, endometrial, colon and prostate) (Malik, Schultz

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Understanding Inflammation

April 9, 2015

Inflammation is the body’s immune, self-protective and healing response to harmful stimuli, irritants, pathogens and damaged cells. Most inflammation is acute, such as when you sprain your ankle. Symptoms of inflammation include swelling, redness, pain and (sometimes) impaired movement or function.

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Coronary Artery Disease: What Every Fitness Professional Needs to Know

March 16, 2015

Developing a thorough understanding of coronary artery disease (CAD) can help fitness professionals fight one of the world’s deadliest diseases. ?

How deadly? For starters, CAD is the leading cause of death around the world, accounting for 13.2% of all deaths in 2012 (WHO 2014a). It kills almost 380,000 Americans every year (CDC 2014a). Exercise professionals can do something about these statistics by designing fitness programs that reduce CAD risk factors in clients while improving their quality of life. ?

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Research Sheds New Light on the Exercise “Afterburn”

March 15, 2015

Some of us call it “afterburn”—the elevated calorie burning that lasts long after exercise is over. The scientific literature defines it as excess postexercise oxygen consumption, or EPOC (see Figure 1). ?

For the most part, EPOC represents the body restoring itself from physiological variables elevated by exercise. EPOC is an important physiological phenomenon for fitness professionals because it can play a contributing role in weight management. ?

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Cardiovascular Exercise Improves Memory

October 16, 2014

Researchers have consistently focused on cardiovascular exercise’s role in pre- venting coronary heart disease, type 2 diabetes, hypertension, some cancers and other chronic diseases. Other studies have examined whether cardiovascular exercise reduces stress, depression and anxiety (Ahiskog et al. 2011).

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Is “Bad” Fat Now “Good”?

September 15, 2014

No doubt personal trainers were surprised and confused after learning about a recent Annals of Internal Medicine study challenging the long-held association between saturated-fat intake and heart disease. Some media reports pounced on the study results, essentially giving green-light messages to eat more red meats and butter.

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