The day my body went to s**t doing HIIT — It’s 7:30 am and way too bright in the room. We’re surrounded by bondage-looking ropes, Thor-like hammers, stationary bikes, rowing machines, lines of free weights and kettlebells, and weighted sled machines. I’m already feeling queasy. Eating those skittles for breakfast probably wasn’t a good choice. Becky bounces in, a toned…