Tag Archives: tennis

Stress is caused by an elevated level of cortisol and adrenaline in the body. These hormones trigger the body’s “fight or flight” response when the body perceives a threat. This response was useful during the prehistoric age but these days, we no longer need a short burst of energy to run away from dinosaurs. These days, high cortisol level in …

A speed bag is a type of punching bag. The speed bag is filled with air then attached to a base on top of a rebound platform parallel to the ground. It’s used to boost a fighter’s punching speed, improve form and boost hand-eye coordination. The speed bag is also used to train a fighter to shift weight between feet …