Final answer:
Excessive frequency of loading on bones can cause fractures due to the immense force exerted. Bones adapt to regular stress through remodeling, becoming denser with exercise and losing mass without stress or with overuse. In resistance training, improper load and alignment can lead to muscle and bone injuries.
Step-by-step explanation:
When the frequency of loading on bones is too high, it can lead to injuries. Bone fractures occur when there is an excessive force or loading, which can cause bones to break. For instance, jumping from a height and landing stiff-legged can result in immense force on the leg bones, potentially leading to fractures. Our skeletons are designed to handle certain amounts of stress, with bone remodeling occurring to adapt to changes. Regular exercise can increase bone density, while inactivity or excessive stress without proper recovery can cause bones to lose strength and mass. In extreme scenarios, like long-duration space missions, astronauts can lose bone mass due to the lack of mechanical stress in low gravity. Moreover, resistance training with loads that are too heavy or without proper alignment can lead to overuse injuries, affecting muscles, tendons, and bones.