One of CrossFit's best-known training protocols combines strength and cardio in a format that can be adapted to any level15 minutes a day before leaving home: a complete workout routine for the entire week In the CrossFit world, acronyms and proper names abound. There are WODs (works of the day, training of the day), there are benchmarks (level tests) with women's names, there are protocols with Greek letters. But 21-15-9 is one of the simplest …
One of CrossFit's best-known training protocols combines strength and cardio in a format that can be adapted to any level15 minutes a day before leaving home: a complete workout routine for the entire week In the CrossFit world, acronyms and proper names abound. There are WODs (works of the day, training of the day), there are benchmarks (level tests) with women's names, there are protocols with Greek letters. But 21-15-9 is one of the simplest …