Dumbbell set, 12 kg, multicolor, A bag of dumbbells and weights

Weight training is a common type of strength training for developing the strength, size of skeletal muscles and maintenance of strength.it uses the force of gravity in the form of weighted bars, dumbbells or weight stacks in order to oppose the force generated by muscle through concentric or eccentric contraction. Weight training uses a variety of specialized equipment to target specific muscle groups and types of movement.sports in which weight training is used include bodybuilding, weightlifting, powerlifting, strongman, highland games, hammer throw, shot put, discus throw, and javelin throw. Many other sports use strength training as part of their training regimen, notably: american football, baseball, basketball, canoeing, cricket, football, hockey, lacrosse, mixed martial arts, rowing, rugby league, rugby union, track and field, boxing, wrestling and judo.the basic principles of weight training are essentially identical to those of strength training, and involve a manipulation of the number of repetitions (reps), sets, tempo, exercise types, and weight moved to cause desired increases in strength, endurance, and size. The specific combinations of reps, sets, exercises, and weights depends on the aims of the individual performing the exercise.