Rather after 28 d GPLC at 4.5 g/d there was a significantly greater rate of power decline within individual sprints with reduced mean power output. In contrast, 28 d at a lower dosage, 1.5 g/d, provided increased mean values of power similar

to those exhibited acutely with 4.5 g. The increases in NO reported after 28 d GPLC at 4.5 g/d are apparently associated with the extreme leg pump that limited cycling power in the present study. Similarly, with 4.5 g/d there was a significant reduction in net lactate accumulation per unit power acutely – with like reductions also observed after 28 d at 1.5 g/d, but not but not after 28 d at 4.5 g/d. Apparently, the long-term effects SN-38 price of GPLC are related to the timed effects of different individual mechanisms. The vasodilatory effects are certainly directly related to NO levels while the increased power output may be related to increased cellular supply of the propionate unit which when converted to succinate provides an anaplerotic energy substrate. Greater carnitine supply may

be responsible for the reduced lactate accumulation due to buffering of the Coenzyme A pool thereby reducing the rate of fatigue and enabling a higher rate of power output. It would appear that both www.selleckchem.com/products/AZD8931.html the vasodilatory effects and power output enhancement effects increased in magnitude over the 28 d period of the present study. The present study is limited by several selleck kinase inhibitor factors including a modest sample size which restricted the statistical analyses. Some variability PDK4 within groups could be associated with the lack of control of the study supplement. Study participants

were provide with 28 days of GPLC in the respective group levels and directed to take six capsules daily. However, there were no means available to ensure daily intake of the respective supplements. This investigation applied three absolute dosage levels (1.5, 3.0, 4.5 g/d) in all research participants. The absolute dosing regardless of body mass likely increased the variability of response within supplementation groups thereby limiting the findings of the present study. It is recommended that future investigations examine GPLC dosing relative to body mass. Regardless of these potential limitations, the total subject pool in this study did not display the same main effects for enhancement of power output with reduced lactate accumulation as had been observed with acute supplementation. While the lower intake group (1.5 g/d) did display improvements in mean values of power output with significantly lower net lactate accumulation per unit power output, the higher intake groups (3.0 and 4.5 g/d) actually produced lower mean values of power output. From the participant reports and the relatively crude thigh girth measurements, it would appear that the higher intake levels produced greater levels of leg pump which acted as a hindrance during high speed, high intensity cycle sprints.