1. Combine strength days with cardio days.
It’s a simple equation: the more muscle you can get working, the more it will challenge your heart and your cardiovascular system. Instead of building cardio-only workouts (the pitfall that’ll prevent you from building endurance) make sure to weave strength days into your training. “Most people reserve one day for strength and another day for cardio. Try combining the two instead,” says Torres. “Use a bench press, immediately followed by pull-ups, then run a mile as fast as you can… and repeat.” Another good example: Jump rope for a minute, followed by squats, an overhead press, and finally sit ups.
2. Do fast-paced, high-intensity lifting.
“When you use weights at an extremely rapid pace, it will not only improve your strength, but also carry over to improve your endurance activity,” says Torres. “It’s one of the best ways to ignite your metabolism. When people do an excessive amount of endurance-only training, they actually slow down their metabolism because it starts to eat away at your muscle tissue.”
3. Remember: Routine is the enemy.
Switching up your workout is essential to building endurance and stamina. According to Torres, the human body gets used to a workout after two weeks. So if you’re always running, start doing Muay Thai instead. Or if you’re an avid 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,” he says. “It’s important to keep the mind guessing.”.