The different exercises that you can do to maintain a fit and healthy body are:
1. Going up and down the stairs as many times as you can in a day
2. Doing pushups. These help in firming the muscles of your arms
3. Doing sit ups. These help in making the muscles of your legs and knees strong
4. Floor exercises like cycling and leg thrusts which will help you to tone your entire body
These simple exercises will help you in toning your body muscles. These exercises will not take you long. You just need to spend about 3-4 minutes and they will help in raising the heart rate and body temperature. These exercises help in the nutrition of a lean body.