which muscle/muscle group would be the prime mover for an arm curl
Anatomical terms of muscle Another example is the dumbbell curl at the elbow. The "elbow flexor" group is the agonist, shortening during the lifting phase (elbow flexion). During the lowering phase the "elbow flexor" muscles lengthen, remaining the agonists because they are controlling the load and the movement (elbow extension). For both the lifting and lowering phase, the "elbow extensor" muscles are the antagonists (see below). They lengthen during the dumbbell lifting phase and shorten during the dumbbell lowering phase. Here it is important to understand that it is common practice to give a name to a muscle group (e.g. elbow flexors) based on the joint action they produce during a shortening (concentric) contraction. However, this naming convention does not mean they are only agonists during shortening. This term typically describes the function of skeletal muscles.[5]
Curling The curler can induce a curved path by causing the stone to slowly turn as it slides, and the path of the rock may be further influenced by two sweepers with brooms who accompany it as it slides down the sheet, using the brooms to alter the state of the ice in front of the stone. Sweeping a rock makes it curl less, and decreases the friction that slows the rock down. A great deal of strategy and teamwork go into choosing the ideal path and placement of a stone for each situation, and the skills of the curlers determine the degree to which the stone will achieve the desired result. This gives curling its nickname of "chess on ice".[3][4]