I have often struggled with tension and back problems. Since I do not want every race times to the doctor to let me prescribe massages or physiotherapy, I've bought several items from Blackroll. Sure - it does not replace a physical therapist and has no knowledge - but a better method for self-treatment does not exist. This massage ball is suitable, for example, excellent to edit stubborn tensions in neck / back. The ball is also ideal for a foot massage after a hard and tiring day at work. I feel really great after that.