Which Set of Muscles is Primarily Used When Doing Bar

Question

Which set of muscles is primarily used when doing bar chin-ups?
A)Biceps femoris muscle
B)Biceps brachii muscle
C)Deltoid muscle
D)Triceps brachii muscle

Accepted Answer

The biceps brachii muscle is the primary muscle used in bar chin-ups. It is responsible for flexing the elbow joint, which is the movement required to pull oneself up on a bar.