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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

Is There a Best Periodization Model?

March 31, 2008

Buford,
T.W., et al. 2007. A comparison of periodization models during nine weeks with
equated volume and intensity for strength. Journal of Strength and
Conditioning Research, 21span …

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The 25 Most Significant Health Benefits of Physical Activity & Exercise

October 1, 2007

People of all ages can improve the quality of their lives and reduce the risks of developing coronary heart disease, hypertension, some cancers and type 2 diabetes with ongoing participation in moderate physical activity and exercise. Daily exercise will also enhance one’s mental well-being and promote healthy musculoskeletal function throughout life. Although habitual physical activity is an a…

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Training to Failure

September 30, 2007

When personal fitness trainers (PFTs) design resistance training programs, they regularly discuss with clients the issue of training to failure—or momentary muscular fatigue. Many trainers adhere to a very strict policy, stating that if muscular “failure” during…

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Fat Facts

August 31, 2007

Weight management programs abound,
and they employ countless strategies and
approaches. But all these programs
should include three principal components:
(1) an exercise plan that incorporates
cardiovascular and resistance
training to increase caloric expenditure and
maintain muscle mass; (2) a lifestyle/
dietary approach that emphasizes balanced
nutrition and decreased caloric …

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Aerobic and Resistance Training Sequence

March 31, 2007

Drummond, M.J., et al. 2005. Aerobic and resistance exercise sequence affects excess postexercise oxygen consumption. Journal of Strength and Conditioning Research, 19 (2), 332–37.

Combining aerobic exercise and resistance training in the same workout session, a technique referred to as concurrent training, can be a time-efficient training metho…

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Vigorous Verses Moderate-Intensity Exercise

August 31, 2006

Swain, D.P., & Franklin, B.A. 2006. Comparison of cardioprotective benefits of vigorous versus moderate intensity aerobic exercise. American Journal of Cardiology, 97, 141–47.
Much emphasis in exercise design now includes attempts at involving students and clients in structured exercise programs as well as in spontaneous physical activity, including standin…

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The Growing Problem of Obesity

October 31, 2005

Statistics demonstrate that countries around the globe are experiencing a spectacular increase in obesity. Worldwide there are an estimated 1 billion obese persons (body mass index [BMI] ≥ 30), and the number has been increasing rapidly over the last two decades (Loos & Bouchard 2003). In the United States 65% of adults are overweight (BMI = 25–29.9), and of these, 31% are obese…

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Improving Balance and Preventing Falls with Tai Chi

April 30, 2005

As you “retool” and re-educate yourself to prepare for new career opportunities and challenges in the 21st century, you may decide to focus on fitness for older adults. With this clientele, preventing falls is a major issue. Research has clearly shown that exercise is…

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New Insights Into Circuit Training

March 31, 2005

Gotshalk, L.A., Berger, R.A., & Kraemer, W.J. 2004. Cardiovascular responses to a high-volume continuous circuit resistance training protocol. Journal of Streng…

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The Effect of Concurrent Training

February 29, 2004

Numerous recreational exercisers complete their
cardiovascular and strength training workouts either during the same training session or within hours of each other. This sequential exercise regime is referred to as “concurrent training.” The question often asked of personal fitness trainers (PFTs) is whether performing cardiovascular exercise prior to strength training will compromise the strength training performance. A recent publication by Sporer and Wenger (2003) addresses this question, as well as some related training issues.

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Highlights From the 50th Annual Meeting of the ACSM

September 30, 2003

Walking Intensity and Bone Mineral Density
Fogleman, K.M., Borer, K.T., & Sowers, M.R. 2003. Walking intensity stimulates increases in BMD in post-menopausal women. Medicine & Science in Sports & Exercise, 35 (5, Supplement), Abstract 95.
Menopause is often associated with a loss in bone mineral density (BMD). Although exercise has been shown to increase BMD in postmenopausal women, the exact mechanism is presently unclear, as are the intensity and types of exercise that will elicit this response.

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Get Creative With Circuits

June 1, 2003

Inactivity is taking its toll on human beings. As fitness professionals, we are keenly aware that society is fascinated with the human body—with losing fat, specifically—and yet, getting people to exercise is still a major obstacle. Obesity, a significant and growing health problem, has been associated with heart disease, diabetes, hyperlipidemia, hypertension and hyperinsulinemia, among…

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