Stressful, repetitive motions have a cumulative effect on joints and _____.

• A. Bones
• B. Tendons
• C. Muscles
• D. Ligaments

Answer: (C)

Repetitive, stressful motions tax the muscles that power those movements. The muscles are the active tissue that generates force and stabilizes joints, so when they’re overused they become fatigued and may develop soreness or micro-tears. As the muscles tire, they lose their ability to support joints effectively, placing more stress on the joints themselves and increasing the risk of pain or injury over time. In cosmetology tasks, where hands, wrists, and forearms perform repeated actions, this muscular fatigue is the most immediate and common consequence, which is why muscles are the best answer.