Very clever and fun idea :) I think there's room for some improvement, especially on variety and UI but overall good job :)

Could use some additional variety to keep the player engaged over the course of 10 days; since it takes a lot of pumping iron to just complete one day in general. I do like the idea of each exercise being its own mini-game of sorts. Nice work! I loved the posters, they are very funny.

This is the kind of game that makes me think that maybe I should go exercise rather than keep playing video games…

I think your idea has potential. 

Some exercises are hard to understand even with the tutorial, and I can't see any progress or rate for the exercise that I'm doing. Something like a percentage or a label that tells me that I made something good or bad.

The game seems funny and hilarious. It reminds me of games like Octodad.

Bench press took me to the backrooms, 5/5.

Don't try this at home! ;)
Hilarious!