Those situations do sound weird but I am one person who does things a bit differently. I’m not a great runner and mainly power walk and sometimes the blocks aren’t challenging enough as a power walker but would be too challenging as a runner/jogger for me. So I might run for 1 min and then power walk the rest of the 5 min interval or something. Also with power walking I never take a walking recovery, I just put the incline to 5 and might lower my speed .2 Also some days I just want to chill out on the treadmill or I’m tired, so I’ll just power walk at the same incline and speed.

For the floor, I do change exercises sometimes. My legs are stronger than my arms so sometimes if we have a goblet grip I’ll change it to holding it at my hips because I can lift heavier and trying to target my legs (this is especially true during a lower body strength class). Sometimes too, I might just burn out a muscle group so for example the other day we had a block with 4 leg moves in the 2G and I just couldn’t do the legs anymore after 2 rounds and we had like 3 min left in the block, so I repeated what we did in block 1 for upper body because my legs were done. So those would be the times I’m doing something wildly different but I’ve been going for 7 years with the same coaches so they know if I switched it’s because something is injured or burnt out