Fitness Medical Evaluation Before starting a vigorous exercise program, check with your doctor for an evaluation of your heart and for guidance on how to pace yourself. Body Mass Calculator Healthy, overweight or obese? The calculator will let you know. Exercise Overview Fitness is most easily understood by examining its components -- cardiovascular endurance, muscular strength, muscular endurance and flexibility. Five Tips For Planning And Losing Weight If motivation is the spark that lights the weight-loss fire, then smart planning is the timber that will keep your desire burning. How Your Body Responds To Exercise Your body's response to exercise is obvious the minute you begin. Copyright 2001-2012 Aetna Inc. Web Privacy Statement | Legal Statement | Privacy Notices | Member Disclosure