This workout routine has become my foundation! The crucible is no excuses no BS no membership no equipment best core maintenance i have ever found. For the first time in my life have abs! The time is minimal. I spend less time working out than I ever did before the key is consistency and intensity. The relatively low impact exercises and are easy to adapt for all levels and abilities or injuries. The format makes results measurable. The clock lets me know exactly how I’m doing. 41 and In the best shape of my life. I love it!