Experimental design and procedure
This investigation utilized a single-blind crossover study design. Participants were randomly assigned to either garlic supplementation (1000 mg, GNC Holdings Inc., USA) or a placebo group. Supplementation was administered over a 4-wk period. The capsules provided for both the garlic and placebo treatment groups were identical in appearance, thus the participants were unaware which treatment they received. After the 28-d washout period, all subjects are changed to perform the different treatments on either garlic or placebo supplementation. Participants performed a standardized 