2007, Does aerobic training enhance effects of spa therapy in back pain patients? A randomized, controlled clinical trial.

Leibetseder V1, Strauss-Blasche G, Marktl W, Ekmekcioglu C

Forsch Komplementmed. 2007 Aug;14(4):202-6. Epub 2007 Jul 16.

https://www.ncbi.nlm.nih.gov/pubmed/17848796