High intensity interval training and L-Arginine supplementation decrease interleukin-6 levels in adult trained males.

Objective: To evaluate the effect of six weeks of high intensity interval training (HIIT) and L-Arginine supplementation on interleukin-6 (IL-6) levels and body composition in Iranian adult trained males.

Methods: This experimental study was performed as an intervention with a pretest-posttest design in three experimental groups and one control group. Fortyeight young males from Qazvin province (Iran) were selected voluntarily based on convenience sampling.