fbpx Skip to content

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.

View FitConnect Profile

Article Archive

Risks And Benefits Of Extreme Conditioning Programs

August 27, 2013

Introduction: What Is Extreme Conditioning?

Extreme conditioning programs (ECPs) boast vastly improved fitness in relatively short periods of time, which appeals to a cross-section of the U.S. civilian and military populations. Yet many health professionals fear that these high-powered, widely marketed programs increase the risk of musculoskeletal injuries.

Read More

Women, Hormones, Metabolism & Energy Expenditure

June 28, 2013

?When it comes to optimal endurance exercise performance, fuel source and utilization play a major role in success. The contribution and expenditure of fats and carbohydrates for the synthesis of ATP (adenosine triphosphate) during exercise are regulated by several factors, including activity, duration and intensity, as well as the person’s age, training status, diet and gender. Proteins contribute a minor 1%–8% of fuel needs during submaximal exercise (Isacco, Duché & Boisseau 2012).

Read More

12 Women’s Health Questions and Answers

May 10, 2013

1. Why are checkups important?

Checkups are vital to the early detection and prevention of health problems. Receiving proper treatments and screenings can lead a woman along the right path to a long and healthy life. The frequency of visits should depend on important lifestyle factors, such as diet, activity level, smoking habits and current health conditions. www.cdc.gov/family/checkup/index.htm; retrieved Aug. 26, 2012.

Read More

Energy Balance Update: Keep Moving!

February 12, 2013

Hall, K.D., et al. 2012. Energy balance and its components: Implications for body weight regulation. American Journal of Clinical Nutrition, 95 (4), 989–94. Energy balance represents the complex interplay between the fuel we consume and the energy we exert, which makes this balance integral to the process of losing weight.

Read More

Kettlebell Research: What Science Says

January 24, 2013

Kettlebells have enjoyed growing popularity as a total-body training tool for improving cardiovascular health and musculoskeletal fitness. Yet for all the enthusiasm among personal trainers, experimental research on the effects of KB training was scant until last year, when studies began showing up in peer-reviewed journals. Here are the recent research findings on KB training.

Study 1. Metabolic Demand of Kettlebell Training

Read More

Kettlebell Research Update

December 11, 2012

Kettlebells have seen growing popularity as a total-body training tool to improve cardiovascular health and musculoskeletal fitness. Yet for all the enthusiasm among personal trainers, experimental research on the effects of KB training was scant until last year, when studies began showing up in peer-reviewed journals. This column updates IFJ readers with recent research on KB training.

Read More

The Not-So-Good News About “Good” Cholesterol

October 23, 2012

Study reviewed: Voight, B.J., et al. 2012. Plasma HDL cholesterol and risk of myocardial infarction: A mendelian randomization study. The Lancet, 380 (9841), 572–80.

Reducing the Risks of Bad Cholesterol

The U.S. Department of Health and Human Services’ Therapeutic Lifestyle Program (TLP) offers these guidelines for limiting the risks of high LDL-C:

Read More

Qualities of Top Teachers

August 23, 2012

Ideally, every exercise professional has had at least one extraordinary teacher. When you think about why that unforgettable teacher made such a lasting impression on you, do you wonder whether you can do the same for your own clients?

Read More

Eating or Fasting for Fat Loss: A Controversy Resolved

April 19, 2012

One variable of interest in Paoli and colleagues’ study was excess postexercise oxygen consumption, or EPOC. This represents the oxygen consumption, or energy expenditure (above the baseline, or pre-exercise, level), that occurs after an exercise bout. It is sometimes called “after-burn,” implying the burning of calories after the workout.

Read More

Sleep Deprivation: Cognitive Function and Health Consequences

January 26, 2012

Issues such as the poor economy and smaller work forces are leading more people to work longer hours. Many exercise professionals train clients who work in the fields of health, technology, security, medicine, computer programming, food services and transportation, which often require working evenings and/or night shifts. These professions, and many others, may disturb sleep patterns, compromising cognitive performance and leading to serious health consequences.

Read More

From 1998 to 2011: ACSM Publishes Updated Exercise Guidelines

September 27, 2011

Garber, C.E., et al. 2011. Quantity and quality of exercise for developing and maintaining cardiorespiratory, musculoskeletal, and neuromotor fitness in apparently healthy adults: Guidance for prescribing exercise. Medicine & Science in Sports & Exercise, 43 (7), 1334–59.

Read More

High Cardiorespiratory Fitness

August 23, 2011

Lee, D., et al. 2010. Mortality trends in the general population: The importance of cardiorespiratory fitness. Journal of Psychopharmacology, 24 (11), 27–35.

Read More

Metabolism Make-Over: Fact or Fiction?

May 18, 2011

A major goal of weight management strategies and programs is to create an imbalance between energy intake (decreasing) and energy expenditure (increasing), in order to facilitate weight loss.

Read More

Marvelous Mitochondria!

April 15, 2011

The mitochondrion (plural: mitochondria) is a specialized organelle found in most eukaryotic cells (cells that contain a nucleus). It is often referred to as a cell’s energy power plant. Essential for human existence, mitochondria are involved in numerous cell processes that rely on energy sustenance—for example, cell growth, cell messaging, aging and replication (Schardt 2008).…

Read More

Improving HDL Cholesterol: How, Why and NOW!

March 15, 2011

Cardiovascular disease, the number-one cause of mortality for U.S. men and women, is a cluster of heart and blood vessel problems that are related to the development of atherosclerosis. Atherosclerosis is a condition that progresses when plaque builds up on the walls of arteries. This buildup narrows the arteries, making it more difficult for blood…

Read More

Free Radicals and Antioxidants

February 17, 2011

As an unexpected consequence of the metabolic steps that convert food into energy, the body produces molecules commonly called “free radicals.” When not produced in too much abundance, free radicals are harmless to the body’s life process and in fact are known to be helpful. However, when cells overproduce free radicals, they can become dangerous…

Read More

Resistance Training and Cardiovascular Exercise for Obese Youth

January 11, 2011

According to the U.S. Department of Health and Human Services (HHS), children and teens should be physically active for at least 60 minutes on most, if not all, days of the week. This recommendation states that the 60 minutes may be accrued in “smaller chunks” of time throughout the day (HHS 2010). However, Troiano et al. (2008) report that only 8% of youth aged 12–19 years are active for a full 60 minutes per day.

Read More