1. It can save your life! Seriously! Regularly doing cardio and strength training reduces your risk of heart disease, diabetes, and endometrial, colon, and breast cancers. The American Heart Association recommends exercising for 30-60 minutes on most days to reduce your risk of heart disease.
2. You'll feel less stressed and happier. Exercise has been proven to improve your mood and decrease anxiety. Studies show that the fitter you are, the better you'll be at handling the long-term effects of stress. One moderately intense 50-minute aerobic workout has been shown to significantly lower anxiety levels.
A study in the British Journal of Sports Medicine found that exercise may be more effective than drugs in treating mild to moderate depression. (Just in: Weight-lifting can do remarkable things for your mood, too!)