I naturally have quite a hypermobile/flexible back, and my teachers have pointed this out to me multiple times. Because of this flexibility, when I attempt a back cambre, I tend to arch my lumbar spine and stick out my bottom. When I try to keep my pelvis tucked and only bend my thoracic spine, I feel very restricted and like I can barely move. Does anyone else have this issue or does anyone have any tips or exercises to strengthen my core to resolve this issue?