Serious diseases are rarely the cause of back pain. If you suffer from spondylolisthesis, avoid the exercise shown where you would arch your back. In this case, please consult your doctor about whether and to what extent you should perform the exercise. If you have a herniated disc, please consult your doctor about whether the exercises shown are suitable for you. In any case, approach the exercises with particular caution and pay close attention to your pain sensation. If you have preexisting conditions such as osteoporosis, please clarify with your treating doctor beforehand to what extent the exercises are feasible for you.