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. 2015 Jun 2;3(6):e12415. doi: 10.14814/phy2.12415

Figure 3.

Figure 3

Change in IIa/IIx muscle fiber frequency is associated with muscle angiogenesis and insulin resistance. (A) Exercise-induced decrease in IIa/IIx fiber frequency is inversely associated with change in vessels/fiber (P < 0.05, r = −0.56). N = 19. (B) IR subjects have significantly higher IIa/IIx fiber frequency at baseline and following training (IS versus IR P < 0.01). Although both groups display decreased IIa/IIx fiber frequency after training (training P < 0.01), there is a trend toward greater IIa/IIx fiber decrease in IS versus IR subjects (training × IR P = 0.15). RMANOVA, N = 11 IS, N = 11 IR.