What is exercise? The actual definition of exercise is; to use repeatedly in order to strengthen or develop, but to make it simpler, exercise is doing programs and workouts to keep fit, for example, running, hiking, bicycling, and any active sport. Most Americans do little or no exercise during work or rest hours. Today there aren't many jobs requiring intense physical activity. Instead of walking, people use automobiles or public transportation. Instead of being physically active, people usually watch TV in their free time. Some sports such as bowling, golf, and tennis doubles provide some exercise, but do not provide...
to be in shape, think about this; look at how long you have been out of shape and it will take about that much time to get back in shape if you exercise properly.

With some of this information earlier stated, exercise seems pretty dangerous, but it's not very dangerous at all, you just need to be careful. No research studies have shown that physically active people are more likely to have sudden, fatal heart attacks than inactive people. A matter of fact, several studies have shown a reduced risk of sudden death for people who are physically active.