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Industries & Professions /
Aerobics Instructors and Fitness Trainers
Three general levels of aerobics classes are recognized today: low impact, moderate, and high intensity. A typical class starts with warm-up exercises (slow stretching movements to loosen up muscles), followed by 35 to 40 minutes of nonstop activity to raise the heart rate, then ends with a cool-down period of stretching and slower movements. Instructors teach class members to monitor their heart rates and listen to their bodies for signs of personal progress.