2. Distract yourself. When you’re watching a video, studies show that you have a lower rate of perceived exertion, so you workout harder.
3. Keep your body guessing. Constantly change the speed or incline of the machine you’re on—if it’s the treadmill, for example, every 30 seconds to a minute, increase it by 0.1 or 0.2 so your body is forced to adapt.
4. Mix strength training with high-intensity cardio. In between every set of bicep curls or lunges, get your heart rate up.
5. Stay cool. You burn more calories in the cold because it takes more energy to heat back up.