During resistance training, which hormone is known to increase in secretion due to high intensity efforts?

In the context of high-intensity resistance training, cortisol is a hormone that is known to increase in secretion. Cortisol, often referred to as the stress hormone, plays a critical role in the body’s metabolism and the stress response. During intense physical exercise, particularly resistance training, the body undergoes physiological stress that stimulates the adrenal glands to release cortisol.

This increase in cortisol helps mobilize energy stores by promoting gluconeogenesis and facilitating fat breakdown, providing the necessary energy to sustain intense efforts. Additionally, cortisol can influence muscle protein metabolism and the body's recovery processes after exercise.

While other hormones listed, such as adrenaline and testosterone, play important roles during and after workouts, cortisol's primary association with high-stress or high-intensity conditions makes it the correct answer. Adrenaline does increase during exercise but is more prominent during acute stress responses rather than specifically linked to resistance training. Insulin, on the other hand, typically decreases during intense exercise as the body prioritizes the mobilization of glucose without the interference of insulin's dominating effect on storage processes. Testosterone, while important for muscle recovery and growth, does not primarily respond to the immediate stress of high-intensity resistance training in the same way that cortisol does.

Thus, cortisol's