We all want simple workouts that deliver results, and that's why the 21-15-9 format has become a staple in high-intensity functional fitness. Originally a CrossFit workout, it involves completing one ...
View post: The 6 Simple Rules That Helped This 40-Year-Old Dad Drop 60 Pounds and Dunk for the First Time The 26.3 workout has a 16-minute cap and increasingly heavier weights. Mat Fraser warns, ...