Final answer:
Hamstring tears are common in athletes, particularly sprinters, and can happen in both adults and children active in sports. Re-injury risk is higher for those with prior hamstring injuries. Runner's knee, different from hamstring injuries, is also a frequent ailment among young athletes who engage in running activities.
Step-by-step explanation:
Hamstring tears typically occur in athletes, particularly those involved in activities requiring high-speed movements like sprinting, where the muscle is prone to overstretching.
While hamstring injuries are prevalent in track and field, they are not limited to adults and can also occur in kids and adolescents, especially if they are actively involved in sports. Having a previous hamstring injury significantly increases the risk of a subsequent one. Unlike hamstring tears, Runner's knee or patellofemoral syndrome is another common injury affecting athletes, especially runners, adolescents, and young adults of both genders.