They never increase two variables during the same workout.
Building lasting strength has to be done in a measured and purposeful way, meaning you have to acquire your baseline to move forward and handle more advanced exercises. This is why training variables become very important as you progress. “Three key variables to keep in mind are frequency (the number of reps), intensity (the resistance or poundage) and duration (the number of sets),” says Guerriero. “If you run, the frequency would be the mileage, the intensity would be the speed, and the duration would be the number of workouts per week,” says Guerriero. Trying to increase too many variables too quickly is a sure way to find yourself out for weeks—or months—with an exercise injury.
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