what is the origin of the primary muscle used in a chin up
Chin-up Both pull-ups and chin-ups are among the best[citation needed] exercises for back and overall upper body conditioning. However, they target the muscles a bit differently. Both exercises will work the latissimus dorsi and biceps, but standard chin-ups—with an underhand grip—place more emphasis on the biceps.
Flexor carpi ulnaris muscle Flexor carpi ulnaris muscle arises by two heads, humeral and ulnar, connected by a tendinous arch beneath which the ulnar nerve and artery pass.