Hi everyone! I am getting very near 2 years post op (8th May) and ever since I began exercising post op I've gotten really into my fitness. Most of my spine is fused apart from at the very bottom so I can bend from the hips. I tried doing sits ups recently and they gave me no back pain until one day my lower back got quite achey. Should I avoid doing sits up in future and other bending related exercise? Any advice will be appreciated