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When it comes to selecting a class, this person identifies two particularly important variables: an instructor’s personality and his or her selection of music. “The music really helps make it fun,” she says. “If you like the teacher’s personality and choice of music, chances are you’ll hang in there; if you don’t, you’ll probably have a hard time sticking with it.” Any gym offering aerobics classes should be able to explain which ones most closely meet your own needs and interests. VIRTUAL REALITY OR VIRTUAL WORKOUT? Just as the world of aerobics classes has grown increasingly diverse and sophisticated in the ’90s, cardio exercise machines have become more elaborate in recent years.

And average gym-goers, who juggle work, family and other responsibilities--how how would you feel about an all-in-one workout for building muscle and improving your cardiorespiratory capacity? As a personal trainer, the first thing I have my clients do when I meet them for their workouts is warm up. And when I teach any type of aerobics class or even a body toning class, we don''t jump right into the high-intensity stuff -- we warm up first. Walking from your car to the gym does not count as warming up. If you''re getting the drift, you probably realize that warming up is crucial to every type of workout, and any sport, for that matter.

For all types of exercise, your warm-up activities should: Take each of the joints through to full range of motion. Increase body temperature. Get you psychologically tuned to what your body will be doing. Physiological reasons for warming up. Warm-ups help the body and its muscles to perform more effectively by: Slowly increasing muscle relieve temperature. Serving as a dry run, which alerts the individual to potential musculoskeletal and other problems that may occur at higher intensity. Reducing the risk of exercise-related heart problems by increasing coronary blood flow. Improving the elasticity of soft tissues. Preventing early lactic-acid buildup and fatigue. Stimulating motor units of the muscles in preparation for a heavier workload.