The use of free weights or weight machines to increase muscle strength. Weight training also increases bone strength and may help prevent bone loss associated with aging. To build strength in the muscles, the weights must challenge the muscles. The ideal weight is one that painlessly exhausts the muscles after 12 to 20 repetitions of an exercise. Lighter weights can build muscle endurance but have less effect on strength. Proper technique is important for preventing injuries when lifting weights. A certified professional instructor or trainer should demonstrate how to lift free weights or use weight machines correctly when a person begins a weight-lifting program.
Conditioning program that requires the use of weights to help increase muscular strength, endurance, power, or body size.