Fritz, Nicole B., Joaquin Calatayud, Phil Page, Mahendra Yadav, Mohammad Sidiq, and Juan C. Colado. 2020. “Applying a Menthol Pain Reliever Prior to Strength Training Reduces Chronic Low Back Pain and Increases Functional Capacity in Overweight or Obese Older Adult”. Journal of Human Sport and Exercise 15 (4proc):S1224-S1241. https://www.jhse.ua.es/article/view/2020-v15-n4-proc-menthol-pain-reliever-training-chronic-low-back.