20 minutes x 7 days: Day 3 TRX is all about standing balance and stretching yoga poses on the strap. This is a great addition to a cardio activity such as dancing, hiking, or cycling! Take it on its own or try the full 20x7: Week of Workouts Series, a perfect weekly workout schedule that balances moderate-high intensity activity with muscle-strengthening exercises and stretches on the TRX.