Keeping Bones and Muscles Healthy
The musculoskeletal system can be weakened by poor diet, injury, ageing and bad posture. Healthy bones need enough calcium and vitamin D (which helps calcium absorption), while healthy muscles and joints need regular exercise. Weight-bearing exercise makes bones denser and muscles stronger.
Common Problems
- Osteoporosis: bones lose mineral (calcium) and become weak and brittle, so they fracture easily. It is more common in older people, especially women after menopause.
- Arthritis: inflammation of the joints, causing pain, swelling and stiffness. In osteoarthritis the smooth cartilage at the joint wears away.
- Fracture: a broken or cracked bone, usually from a fall or blow.
- Muscle cramp and sprain: a cramp is a sudden painful muscle contraction; a sprain is a stretched or torn ligament at a joint.
Key idea
Calcium and vitamin D build strong bone; regular exercise strengthens muscle and keeps joints mobile.
Preventing Problems
Good habits protect the system: eat calcium-rich foods (milk, small fish, leafy greens), get some sunlight for vitamin D, exercise regularly, keep a healthy body weight (to reduce stress on joints), sit and lift with good posture, and warm up before sport to avoid sprains.
Example
An elderly woman with osteoporosis slips and fractures her hip because her bones have lost calcium and become brittle. A lifetime of enough calcium, vitamin D and exercise lowers this risk.
Remember
Osteoporosis = weak, brittle bones (low calcium). Arthritis = painful, inflamed joints. Warming up helps prevent sprains.