Routine is the enemy. Keep the mind guessing.
Switching up your workout is essential to building endurance and stamina. The human body gets used to a workout after two weeks. If you’re always running, start doing Muay Thai, if you’re a cyclist, change it up by running stairs. You need to move the muscles in a different way so that you don’t develop overuse. Plus, it becomes more motivating.
It’s important to keep the mind guessing.