I do crossfit, but for some reason some people are completely against it. Super tough workouts, everyone does the same thing for time. Spicy.
I love crossfit...but over the past 5+ years, I have started and stopped it several times due to injury (including one shoulder surgery). I have had to come to grips with the fact that I cannot be trusted to push myself that much...I simply don't know when to stop/slow down/etc to avoid injury.
These days I am simply trying to get less fat by walking at the prompting of my fitbit.
Based on the expertly done wall punching.. indeed thou may have problem controlling all that rage power..
As for walking.. it's quite good, very low impact, and you don't get that -i'm gonna pass out- feeling, so it's easier to go back to it every day..
The issue here now is.. because walking is lower in terms of Calories/minute.. Eventually you hit the time-wall..
Where you'll become very accustomed to the walking such that it's absolutely no challenge for your body.. and the time it takes to do it will seem costly..
So from there.. I recommend stationary bike.. Very convenient.. Private, no one needs to see you sweat (some people are self conscious).. and it's ALSO low impact.. which is a very important because, there's No good reason to wear out your joints.. it's not for a job, and we are no longer chasing or being chased by lions..