2: Contracting and relaxing of biceps and triceps during flexion (a)

2: Contracting and relaxing of biceps and triceps during flexion (a)

2: Contracting and relaxing of biceps and triceps during flexion (a)

2: Contracting and relaxing of biceps and triceps during flexion (a)

2: Contracting and relaxing of biceps and triceps during flexion (a)

2: Contracting and relaxing of biceps and triceps during flexion (a)

2: Contracting and relaxing of biceps and triceps during flexion (a)