Final answer:
The hurdler's stretch is controversial because it can exert excessive stress on the inside of the knee, which may lead to injury or exacerbate existing conditions. It's essential to prioritize safe stretching techniques to prevent muscle strains, which are painful injuries characterized by torn muscle fibers.
Step-by-step explanation:
The hurdler's stretch is considered controversial as a lower-body stretch because B: the stretch provides excessive stress to the inside of the knee. When performing the hurdler's stretch, one leg is extended straight out while the other leg is bent with the foot placed against the thigh or knee. This position can place undue pressure on the inside of the knee of the straight leg, potentially leading to strains or other injuries. Such a stretch is especially risky for those with previous injuries or without proper flexibility.
A muscle strain is when muscle fibers tear due to overstretching, and this type of injury can be quite painful, including symptoms such as stiffness and bruising in the area of the strain. Since the hamstrings are particularly susceptible to strains in athletes, especially in sports like track and field, it's crucial to prioritize safe stretching techniques that do not exacerbate the risk of injury. Having a previous hamstring injury could increase the risk of future injuries, further highlighting the importance of avoiding stretches like the hurdler's that can impose additional stress on vulnerable areas of the lower body.
the correct option is A. The stretch provides excessive stress to the hamstring muscles.