The One and Done Workout is a unique type of high intensity workout where you give as much effort as you possibly can for 20 seconds and ONLY 20 seconds.
Each time you do a 20-second interval, you activate your metabolic multipliers and prepare your body to burn fat for at least 24 hours and up a possible 48 hours in some people.
*Results not typical
*Results not typical
*Results not typical
*Results not typical