What part of your body do squats work?

I'm doing a squat challenge & I was wondering what all body parts do they work? Other than the obvious thighs/legs.


If anyone wants to do the challenge here it is

Day 1: 30
Day 2: 35
Day 3: 40
Day 4: 45
Day 5: Rest
Day 6: 55
Day 7: 60
Day 8: 70
Day 9: Rest
Day 10: 85
Day 11: 90
Day 12: 95
Day 13: 100
Day 14: Rest
Day 15: 75
Day 18: 85
Day 19: 95
Day 20: 105
Day 21: Rest
Day 22: 125
Day 25: 130
Day 26: 135
Day 27: 140
Day 29: Rest
Day 31: 155
Day 32: 165
Day 33: 170

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