Remember this exercise is just the beginning, as part of a 30 day challenge each session builds ... or hours at the gym to make progress. Just 20 minutes of focused effort can lead to real ...

The challenge is a play on the super-intense 75 Hard challenge, a restrictive fitness, exercise ... which requires 75 days of two workouts per day, a strict diet, a prescribed amount of water ...

You'll keep coming back to this workout during the WH Flex Challenge. Once you've completed your 28-day challenge track, there are two alternative tracks to try out for even more gains.