What is the difference in the endocrine response to a 5RM squat when compared with a 15RM squat?

The correct answer highlights the difference in testosterone release associated with performing a 5RM squat compared to a 15RM squat. When engaging in heavy resistance training, such as a 5RM squat, the body experiences a greater anabolic stimulus due to the high load lifted. This intense effort leads to a more pronounced release of testosterone, a hormone crucial for muscle growth and strength development.

Testosterone is involved in promoting protein synthesis and muscle recovery, and higher intensity training has been shown to elicit a significant response in its secretion. The elevated levels of testosterone facilitate adaptive responses that enhance muscle hypertrophy and strength outcomes.

In contrast, lower repetition ranges, such as those seen in a 15RM squat, tend to induce less acute hormonal response, including lower peaks of testosterone. While other factors like volume and total work are important in the hormonal response to exercise, the intensity of a 5RM squat primarily contributes to the pronounced elevation in testosterone levels due to the stress it imposes on the body.

This distinction is essential in understanding how different resistance training protocols can influence the endocrine system and the resultant physiological adaptations.