In this experiment, students will record EMG activity from muscles on the anterior and posterior sides of the forearm to determine which ones are responsible for flexion and extension of the hand. Recording of EMG activity from these muscles will also be done while a weight is lifted by the hand. In another exercise, students will record EMG activity from the anterior and posterior sides of the lower leg to determine which muscles are active during movements or positioning that are more complex, like leaning forward, standing on toes, or rocking on heels.