I did crossfit for 2 or 3 months, i've done various other intense hour-long workout classes fairly consistently for a couple years, I played highschool sports back in the day

Nothing melted the fat right off me as blazing fast as yoga does. When I string together a good 2 or 3 weeks in a row (like 3 1-hour sessions per week), the change is drastic. AND I have more endurance and strength, coming back to those other activities like I'm superman.