Strength training is a type of physical exercise specializing in resistance to induce muscular contraction, which builds the strength, anaerobic endurance, and size of skeletal muscles. It provides significant functional benefits and improves overall health and well-being when appropriately performed. This includes 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 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. 

Strength training is central in sports: 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 football, wrestling, rugby, track and field, rowing, lacrosse, basketball, and hockey. Strength training for other sports and physical activities is becoming increasingly popular.

Besides the obvious main benefit of building muscle, strength training offers a variety of incredible holistic health advantages. They are:

• Strengthen bones and joints
• Increase lean body mass
• Enhance flexibility
• Improve sleep
• Promote better posture
• Improve blood sugar control
• Reduce cancer risk
• Boost body image
• Improve cardiovascular health
• Reduce depressive symptoms
• Assist with weight management