The primary muscle used in the barbell upright row is the deltoid, specifically the lateral or middle deltoid. This exercise also engages the trapezius and the biceps to a lesser extent as secondary muscles. By lifting the barbell vertically towards the chin, the upright row effectively targets shoulder strength and stability. However, it's essential to use proper form to minimize the risk of shoulder injury.
shoulder flexion shoulder adduction shoulder horizontal extension
The primary muscles activated by the barbell shrug are the trapezius, or traps, and rhomboids
The primary muscles activated by the barbell shrug are the trapezius, or traps, and rhomboids
The primary muscles activated by the barbell shrug are the trapezius, or traps, and rhomboids
Depending on where you position your arms either the pectorals or triceps
medial deltoid(shoulders), traps & biceps
The back muscles, specifically the upper and lower trapezius, are involved in the shoulder shrug. http://www.exrx.net/WeightExercises/TrapeziusUpper/DBShrug.html
The Zygomaticus is the primary muscle used in smiling.
The triceps muscle is the primary muscle used in a cable extension.
The squat works many muscles in the body in some form. The primary movers are the hamstrings, quads, and glutes. Assuming you are doing them correctly with your knees out and squatting below parallel, you should be using your hip adductors as well.
The Quadriceps
The primary muscle attached at the point of insertion is the muscle that undergoes the most movement when the muscle contracts. For example, in the bicep curl exercise, the bicep muscle is the primary muscle attached at its point of insertion on the radius bone in the forearm.