What condition is characterized by weak bones that break easily?

The condition characterized by weak bones that break easily is osteoporosis. This disease occurs when the creation of new bone doesn't keep up with the removal of old bone, leading to a decrease in bone density and strength. As a result, individuals with osteoporosis are at increased risk of fractures, often from minor falls or even normal daily activities.

Osteoporosis is particularly common in older adults, especially postmenopausal women due to the decrease in estrogen, which plays a crucial role in maintaining bone density. Understanding osteoporosis is important in the context of physical education because it highlights the significance of weight-bearing exercises and proper nutrition in maintaining bone health throughout life.

Arthritis primarily affects joints rather than bone density, while rickets is associated with vitamin D deficiency leading to softening of bones in children. Osteochondrosis involves the growth plate and can affect how bones and joints develop but does not directly relate to the weakness and fragility of the bones as seen in osteoporosis.