How Your Bones Change With Exercise

The video explores how exercise impacts bone health, emphasizing the importance of both compressive and tensile forces in maintaining and increasing bone density. It explains bone structure, including compact and spongy bone, and how these adapt to stress. The video also covers the role of osteoblasts and osteoclasts in bone remodeling and provides exercise recommendations to enhance bone health.

What surprising change was observed in astronauts after returning from space?

• Increased muscle mass

• Decreased bone density

• Enhanced flexibility

• Improved cardiovascular health

What are the two types of bone tissue mentioned in the video?

• Dense and hollow

• Cartilage and marrow

• Compact and spongy

• Rigid and flexible

How do trabeculi in spongy bone align themselves?

• Randomly

• In direct lines of stress

• Parallel to the bone surface

• Perpendicular to the bone surface

What is the primary inorganic component of bone that provides compressive strength?

• Collagen

• Calcium carbonate

• Hydroxyapatite

• Phosphorus

Which type of exercise is NOT mentioned as beneficial for bone health?

• Jumping

• Weightlifting

• Swimming

• Running

What force is applied to bones during a biceps curl?

• Tensile force

• Gravitational force

• Shear force

• Rotational force

What happens to bone density when osteoblasts outpace osteoclasts?

• Bone density decreases

• Bone density remains the same

• Bone density increases

• Bone density fluctuates

What role does estrogen play in bone remodeling?

• Increases bone flexibility

• Inhibits osteoclasts

• Decreases bone density

• Stimulates osteoblasts

Which exercise is suggested as an alternative to running for bone health?

• Yoga

• Pilates

• Cycling

• Swimming

What is the recommended intensity range for weightlifting to benefit bone density?

• 1-5 reps

• 13-20 reps

• 21-30 reps

• 6-12 reps