environmentalist. 1  a person who accepts the theory that environment is of overriding importance in determining individual characteristics. 2  a person working to solve environmental problems, as air and water pollution, the exhaustion of natural resources, and uncontrolled population growth.
1 Muscle helps you with aerobic exercise. The stronger you are, the better you will be at any aerobic activity.  Weight training improves your body's muscle-to-fat ratio (you end up with less body fat and more muscle), which improves both your health and your fitness level.
Fitness is important not only for medical reasons, but also for mental health reasons and for overall quality of life. Being physically fit not only brings the benefit of fewer health problems in the future, but the exercise done to maintain physical fitness is stress relieving and helps you sleep better at night.any people start an exercise routine in order to lose weight. However, if you exercise at a high intensity level for a sustained amount of time, you may end up increasing your appetite to a degree where you're eating more calories after your workout than you burned while you were exercising.