The document discusses physical exercise and physical activity. It defines physical exercise as any activity performed to maintain or improve physical fitness and health. Regular physical exercise provides benefits like reducing risk of diseases. Some types of exercises mentioned are aerobic, strength, balance and flexibility training. While exercise is planned physical activity, physical activity is any movement using muscles that requires energy. The document also lists some of the best exercises for different body parts and health benefits of regular exercise. It notes that lack of exercise can lead to deconditioning of muscles over time. Finally, some exercises that can be done at home without gym equipment are described.