The Comparison of Plasma IL-6 Level after Increasing Speed and Inclination Gradually Treadmill Exercise

This study aimed to observe the effect of treadmill exercise with increasing speed and inclination gradually to plasma IL-6 levels. Twenty adult men divided into speed (SG) and inclination groups (IG) running on a treadmill EN_Mill 2007 for 30 minutes, three times per week in 2 weeks. SG started 5 km/h and increased 1 km/h every minute without inclination until the target heart rate is reached (70% MHR). IG started 3 km/h with increasing of inclination 2.5%, 5%, 7.5%, 10%, 12.5%, 15%, 20%, 22% every minute until target heart rate is reached (70% MHR). Blood samples taken 30 minutes before and after exercise in first and last training. Significantly decreased of plasma IL-6 levels in both groups before and after exercise at first training (p=0.001) and before-after exercise at the last training (p=0,004) in SG, while in inclination group plasma IL-6 levels before-after exercise showed no significant decreasing (p=0,107) at the last training. In both groups, there is significant delta (Δ) of plasma IL-6 levels between before exercise at the first and last training (p=0.001), between after exercise at the first and the last training (p=0.001). Plasma IL-6 levels decrease with exercise either by increasing inclination or speed gradually.