Anyone have any suggestions on how to do a knee tuck crunch without rounding your back? I try to keep mine as straight as possible but after about 20 seconds it begins to hurt. I'd like to imagine my lower back is pretty strong, but maybe I need to work on making it stronger? Any suggestions blenders?
Knee Tuck Crunches - lower back pain?
Anyone have any suggestions on how to do a knee tuck crunch without rounding your back? I try to keep mine as straight as possible but after about 20 seconds it begins to hurt. I'd like to imagine my lower back is pretty strong, but maybe I need to work on making it stronger? Any suggestions blenders?
Thanks!