For the people posting "sample size was only 25" and related comments, the below is from the PLOS abstract. p values <0.05 indicate that the results are not due

For the people posting "sample size was only 25" and related comments, the below is from the PLOS abstract. p values <0.05 indicate that the results are not due to just chance. The p values of their results are quite low for the test group, but large for the control group. This indicates the results are statistically significant. "Results Peak oxygen uptake increased after training by 19% in both groups (SIT: 32±7 to 38±8; MICT: 34±6 to 40±8ml/kg/min; p<0.001 for both). Insulin sensitivity index (CSI), determined by intravenous glucose tolerance tests performed before and 72 hours after training, increased similarly after SIT (4.9±2.5 to 7.5±4.7, p = 0.002) and MICT (5.0±3.3 to 6.7±5.0 x 10−4 min-1 [μU/mL]-1, p = 0.013) (p<0.05). Skeletal muscle mitochondrial content also increased similarly after SIT and MICT, as primarily reflected by the maximal activity of citrate synthase (CS; P<0.001). The corresponding changes in the control group were small for VO2peak (p = 0.99), CSI (p = 0.63) and CS (p = 0.97)." http://journals.plos.org/plosone/article?id=10.1371/journal.pone.0154075 http://journals.plos.org/plosone/article?id=10.1371/journal....