Fig. 1.

Flow chart. A total of 158 and ninety-six participants were recruited to trials I and II, respectively. In all, eighteen participants in trial I and fourteen participants in trial II dropped out before the 8-d data collection period started and one participant in trial I dropped out during the data collection period. Hence, 221 participants completed the studies. Before data analysis, thirty participants were excluded to avoid repeated measurement from those who participated in both studies and two participants were excluded due to protocol violation.