Anonymous ID: 9c08ac Feb. 28, 2019, 7:48 p.m. No.5442776   🗄️.is 🔗kun

I was told 60 sit ups with no audible "cracking" sounds means the rib is not broken. You have to do them within 2 minutes and no rests. If you take a rest then you have to start over. Listen carefully.