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Figure 3: Association between exercise characteristics and net change of HDLC. (a) Exercise length (weeks). (b) Frequency, sessions/week. (c) Duration, min/session. (d) Total minutes. This result shows exercise was best predictor of an increase in HDLC level. Each trial was weighted by the inverse of the sample size of each exercise group. The circles represent each study. P < 0.05 is regarded as significance. The calculation of net change in HDL was the same with Figure 2. HDLC = Highdensity lipoprotein cholesterol 
