I broke a rib just over 6 weeks ago. Went two weeks without riding, then rode on pavement with pressure low to keep a very smooth ride, and even then only 11-12 mph. Just keeping the legs spinning. At 5 weeks a tried getting on some trails, went easy, now all seems healed up and ready to go. BTW, I am 42, broke some ribs when I was 32, this time took longer to heal up.