KETTLER Strength Training Equipment specializes in the use of resistance to induce muscular contraction which builds the strength, anaerobic endurance, and size of skeletal muscles. KETTLER Strength Training Equipment can provide significant functional benefits and improvement in overall health and well-being, including increased bone, muscle, tendon and ligament strength and toughness, improved joint function, reduced potential for injury, increased bone density, increased metabolism, improved cardiac function, and elevated HDL ("good") cholesterol. KETTLER Strength Training Equipment uses the technique of progressively increasing the force output of the muscle through incremental weight increases and uses a variety of exercises and types of equipment to target specific muscle groups. KETTLER Strength Training Equipment provides an anaerobic activity, although some proponents have adapted it to provide the benefits of aerobic exercise through circuit training as well.