Functionally, the biceps are key players in elbow flexion (bending the arm), forearm supination (rotating the forearm so the palm faces upward, like turning a doorknob or opening a jar), and shoulder ...
The Guinness World Record for the longest low plank is currently 8 hours and 1 minute, set by Chinese policeman Mao Weidong in 2016, but retired Marine George Hood completed a record attempt in June ...