But all you need is a carpeted floor or mat and set of dumbbells or barbells or other weighted objects. You can substitute rice and soda for the dumbbells in these exercises as well. While there are no disadvantages to resistance training, per se, you can strain a muscle or injure a joint if you fail to warm up properly, if you overtrain, or if you don. If you have a physical limitation or are recovering from an injury, seek guidance from a physical therapist or exercise physiologist. And be sure to get your physician.
Resistance training is beneficial at any age.
For adolescents, resistance training helps facilitate growth of bones and ligaments. It also improves athletic performance. Coaches can instruct students on exercises that strengthen muscle groups used in the particular sport they are involved in. As people get older, strength training becomes even more important. Muscle atrophy may result from the loss of muscle fibers, and is directly proportional to age-related decreases in strength.