Heavy weight or light weight is more effective in a workout?

Lifting lighter weights for more repetitions works your muscles just as much as doing just a few reps with very heavy weights, so you’ll gain the same amount of strength either way. However, the weight amount does affect the type of muscle fibers recruited when you lift, which determines whether you’re building endurance strength or explosive strength. Lifting heavier weights also releases more muscle-growth and fat-burning hormones than lifting light weights