This video discusses osteoporosis which is a serious bone disease. Osteoporosis is a condition in which the bones have low mineral density and can become brittle and porous. This video covers exactly what it is and ways to prevent it from developing. While nutrition is important to prevent it resistance exercises also help significantly. The resistance being applied helps to build up and strengthen the bone making it more dense and less likely to become brittle and porous.
This video highlights the importance of having someone with you while performing higher intensity strength exercises in order to spot you to prevent any possible injuries.