Final answer:
Kids are most likely to injure extremities and the back during resistance training due to improper technique, insufficient recovery time, and disproportionate stress on growing bodies.
Step-by-step explanation:
When resistance training, kids are particularly vulnerable to injuries due to the rapid growth and development of their bodies. If resistance training is done improperly, it can lead to overuse injuries such as muscle strains, tendonitis, and even bone fractures. The areas of the body that are most susceptible are those under the most stress during exercises, especially when proper technique is not followed. Commonly, these injuries affect the extremities like hands and feet, arms and legs, followed by the trunk and shoulders due to the sequence of growth during the Adolescent Growth Spurt (AGS). Back injuries are also a significant concern, as the spine and associated muscles are involved in a majority of resistance training exercises. Overexerting these muscles can lead to issues like herniated discs, which are particularly problematic given that back muscles have a mechanical disadvantage and must exert large forces. Adequate rest and recovery, appropriate load management, and proper alignment during exercises are crucial to preventing these injuries.