Figure 8.

Skeletal muscle phospholipid abundance in response to training. (A) Heatmap displaying log₂ fold-change (log₂ FC) relative to pretraining, for individual phospholipid species; phosphatidylserine (PS), phosphatidylglycerol (PG), phosphatidylinositol (PI), cardiolipin (CL), phosphatidylethanolamine (PE), and phosphatidylcholine (PC). (B-C) Relative abundance of total PC and PE normalized to pretraining. The pretraining level is indicated by the dashed line at 1.0. (D-E) Total PC and PE abundance expressed relative to total CL and normalized to pretraining. The pretraining ratio is indicated by the dashed line at 1.0. *Significant main effect of visit compared with pretraining (P < 0.05). †Significant group × visit interaction, with a larger increase compared with pretraining in HIIT versus MICT (P < 0.05). Data are presented as mean ± SD (MICT n = 9, HIIT n = 8). HIIT, high-intensity interval training; MICT, moderate-intensity continuous training.