By Debra Wein, MS, RD
The Facts About Vitamin B12
itamin B12, often thought of as strictly a concern for complete vegetarians, is being investigated further. In fact, recent research indicates that meat eaters and people with depression may also have limited B12 stores. According to the Dietary Reference Intakes released by the National Academy of Sciences in 1999, adults should...
By Derek Marks, MS, and Len Kravitz, PhD
Hormones and Resistance Exercise
ormones play a large role in the muscle hypertrophy and strength gained from resistance exercise. While hypertrophy and strength gained in men are attributed to increased levels of testosterone, it is still unclear how women are able to respond similarly to resistance training in the absence of increas...
The ultimate goal of
pregnancy is a positive outcome--that is, a healthy mother and child. One way fitness professionals can help pregnant women ensure a positive outcome is to encourage them to exercise. Over the last few decades, researchers have established not only that exercise during pregnancy is safe, but also that it promotes the health and well-being of both the infant and the mother. ...
By Len Kravitz, PhD
Exercise and Psychological Health
esearch literature continues to expand in support of the major health benefits associated with regular physical activity and exercise, including reduced risk of cardiovascular disease, hypertension and stroke, as well as protection against some cancers and osteoporosis. Yet there also is a growing body of knowledge that subst...
By Paula Anderson, MS
The Active Range Warm-Up:
Getting Hotter With Time
n the early days of group fitness when everyone wore leg warmers and exercised to Jane Fonda tapes, the warm-up portion of a typical cardio conditioning class included moves borrowed from ballet, jazz dance and yoga. Unending head turns, pli...
By Christopher C. Frankel and Len Kravitz, PhD
eriodization is an organized approach to training that involves progressive cycling over a specific period of time. The roots of periodization stem from Hans Selye's General Adaptation Syndrome model, which has been used by the athletic community since the late 1950s (Fleck 1999). Selye identified two sources of biolog...
By Pa t t i T ve i t M i l l i g a n , M S , R D
What you need to know to help your athletic clients stay on top of their unique nutritional needs.
or athletes engaged in serious physical conditioning, nutrition can be crucial. Proper nutrition can improve endurance, speed recovery from exertion, lower the risk of injury and assist in rehabilitation. By keeping up wit...
People with yoga or meditation experience are able to learn how to control a computer with their minds faster and better than people who do not have equivalent experience, according to research by biomedical engineers at the University of Minnesota, Minneapolis.
Five small-group training experts answer questions about this burgeoning trend. Topics include working simultaneously with clients at different skill levels; training people with special needs (whether they are athletes or clients with disabilities); handling no-shows; and teaching warm-ups.
newsletter_teaser: Five small-group training experts answer questions about this burgeoning trend. Topics include working simultaneously with clients at different skill levels; training people with special needs (whether they are athletes or clients with disabilities); handling no-shows; and teaching warm-ups.
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