Viktstyrka

Viktstyrka is a term used in Swedish fitness and sports science to describe muscular strength as it relates to weight. The concept is commonly discussed in two forms: absolute strength, the total force a muscle or muscle group can generate, and relative strength, the amount of force available per unit of body weight. Viktstyrka is relevant for athletic performance, daily tasks, and rehabilitation.

Common methods to assess viktstyrka include one-repetition maximum (1RM) tests for lifts such as the squat, bench press, or deadlift; handgrip dynamometry; and isokinetic testing. Relative viktstyrka is typically calculated by dividing absolute strength (in kilograms or newtons) by body weight (kg).

In sport and activity, higher viktstyrka improves jumping, sprinting, climbing, lifting, and functional movement. In aging populations, greater viktstyrka is linked to better independence and lower risk of falls. Testing and tracking viktstyrka helps tailor training and rehabilitation programs.

Training to improve viktstyrka generally emphasizes progressive overload with resistance exercises, especially multi-joint movements. Programs may cycle between high-load/low-rep and moderate-load/moderate-rep phases. Nutrition, recovery, and body composition influence relative viktstyrka, because gaining lean mass without excessive fat can increase strength per kilogram while maintaining performance.

See also: strength, absolute strength, relative strength, one-repetition maximum (1RM), dynamometry.