5:19 AM, Saturday February 22nd 2020
Nicely done, on both accounts! Careful not to let your warmups go beyond 15 minutes, though. ... unless you can do the entire rotated boxes exercise in that time, in which case, TEACH ME.
I usually spend 5 to 15 minutes warming up.
I really don't know how long rotated boxes took me, I did it in several times... but maybe in 15 minutes it's doable with some practice :-)
Next time, I'll time!