  strength training is a type of physical exercise specializing in the use of resistance to induce muscular contraction which builds the strength, anaerobic endurance, and size of skeletal muscles. when properly performed, strength training 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. training commonly 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. strength training is primarily an anaerobic activity, although some proponents have adapted it to provide the benefits of aerobic exercise through circuit training. sports where strength training is central are bodybuilding, weightlifting, powerlifting, strongman, highland games, shotput, discus throw, and javelin throw. many other sports use strength training as part of their training regimen, notably american football, wrestling, track and field, rowing, lacrosse, basketball, poledancing (or polefitness), hockey and football. strength training for other sports and physical activities is becoming increasingly popular. ==uses==  the benefits of weight training include greater muscular strength, improved muscle tone and appearance, increased endurance and enhanced bone density. ===increase physical attractiveness=== many people take up weight training to improve their physical attractiveness. most men can develop substantial muscles; most women lack the testosterone to do it, but they can develop a firm, "toned" (see below) physique, and they can increase their strength by the same proportion as that achieved by men (but usually from a significantly lower starting point). an individual's genetic make-up dictates the response to weight training stimuli to a significant extent. workouts elevate metabolism for several hours following the workout, which also promotes fat loss.{{cite journal | format = pdf | author = de mello meirelles, c. |author2=gomes, p.s.c. | year = 2004 | title = acute effects 
Physical_exercise Strength_training