Blood lactate concentration Plasma lactate rose sharply at the highest workload in eight trained cyclists. i Sources Blood lactate rises with exercise intensity Approximate plasma lactate values from van Loon and colleagues: 0.8 millimoles per litre at rest, 0.9 at 44 percent VO2 max, 1.5 at 57 percent, and 9.5 at 72 percent. 024 6810 mmol/L LT1LT2 ~0.8~0.9 ~1.5~9.5 Rest44% 57%72% Exercise intensity (% VO₂max)
Primary energy source Carbohydrate supplies a larger share as intensity rises; fat contribution falls at high intensity. i Sources Fat and carbohydrate contribution across exercise intensities At rest the study measured 56 percent fat and 44 percent carbohydrate. At 44 percent VO2 max the split was 55 and 45 percent, at 57 percent it was 49 and 51 percent, and at 72 percent it was 24 and 76 percent. 0%25%50% 75%100% Carbohydrate Fat 4456 4555 5149 7624 Rest44% 57%72% Exercise intensity (% VO₂max)
