If you want to work on toning up and gaining muscle strength, remember two key things: rest your muscles and don't overdo it. All weight workouts should be kept fairly short because after an extended period of time your body begins to create a stress response. It is also important to take time off between muscle workouts in order to allow your muscles to rest and recharge.

Studies have shown that by working out at a moderate rate for about an hour, you can be maintaining a healthier weight and also decreasing your risk of heart disease and other ailments. Moderate exercise is not just going to the gym, but it can be moderate housework, jogging for 20-30 minutes, or even walking at least 4-5 miles. Find what works for you.