Article 1 Back Pain 1 Breathing Exercises 1 Exercise 1 Exercise Therapy 1 Humans 1 Low Back Pain 1 Low back pain 1 Maximum voluntary ventilation 1 Respiration 1 Respiratory muscle adult 1 backache 1 body mass 1 breathing exercise 1 clinical article 1 clinical effectiveness 1 combined ball and balloon exercise 1 controlled study 1 core stability exercise 1 exercise 1 female 1 human 1 joint stability 1 kinesiotherapy 1 low back pain 1 lumbo pelvic stability 1 male 1 maximal expiratory pressure 1 maximal voluntary ventilation 1