'Locking In': The TikTok Wellness Craze Putting Runners on the Sidelines

Lower back pain. 5.9. 9, Toenail damage. 5.9. 10, Runner's knee. 5.8. 11, Hip flexor pain. 5.3. 12, Black toenails. 5.0. 13, Shin splints. 4.8. 14 …
Source: back pain