Question

draw a free body diagram of the deadlift starting position. include three external moment arms, three internal moment arms, relevant internal muscle force vectors, and anything else you think is important( pretend there is a barbell with a plate here)

Answer 1

deadlift is a basic human movement other than squat there might not be another movement that is more functional.

bend your knees and bend over with a flat back to pick up a loaded barbell off the ground.

your arms ,fore arms and hands hold on to the barbell and make sure the bar stays in the right position and stays stable throughout the lift your shoulders and traps hold the weight and hold it stable.

back and core help to keep your entire body tight and stable to help keep your spine secure your posterior chain and legs to act as a lever and lift the weight.