Fig. 2

Change in plasma glucose levels in a 2-h oral glucose tolerance test (n = 61 in the lean group marked in black diamond, n = 36 in the NGT group marked in white circle for pre-training and black circle for post-training, and n = 11 in the IGT group marked in white square for pre-training and black square for post-training). Mean ± standard deviation is shown for plasma glucose. Area under curve (AUC) of plasma glucose was used for comparisons among the groups. Analysis of variance was implemented for testing the difference in plasma glucose among the three groups (i.e. the lean, the IGT and NGT groups), and paired tests were employed for testing post-training differences for the two subgroups. ^* significant change after training. ^a significant difference between either the IGT or NGT group and the lean group