Muscle & Strength

Muscular Endurance

Supplements and protocols ranked by XP

29XP

Slightly increases the number of reps you can do, most clearly when you lift to failure.

Studies1 2 3

21XP

Small gains in how many reps you can do in hard, high-rep sets.

Studies1 2 3

18XP

Adds a few reps in hard, high-rep sets, mainly in the upper body.

Studies1 2 3