Martin, Endang Ambarwati and Rahmi Isma AP 2024. Comparison of Lumbar Stabilization Exercise and Flexibility Exercise on Lumbal Flexibility in Chronic Mechanical Lower Back Pain (Study on Online Motorcycle Drivers). Indonesian Journal of Physical Medicine and Rehabilitation. 13, 01 (Jun. 2024), 1 - 9. DOI:https://doi.org/10.36803/indojpmr.v13i01.378.