Table 4. Physiological, metabolic, respiratory, and performance data collected during the 5 km time trials (N = 7). Values are Mean ± SD.
LCHF Running Trials HCLF Running Trials P Value
Day 4 Day 14 Day 28 Day 42 Mean Day 4 Day 14 Day 28 Day 42 Mean COND Time Interaction
Mean VO2(L/min) 3.5±0.5 3.6±0.6 3.7±0.5 3.7±0.8 3.6±0.6 3.6±0.5 3.6±0.5 3.6±0.5 3.4±0.7 3.5±0.5 0.041 0.842 0.207
Mean VCO2(L/min) 3.1±0.5 3.2±0.6 3.2±0.5 3.3±0.8 3.2±0.6 3.5±0.5 3.5±0.6 3.5±0.6 3.3±0.8 3.4±0.6 0.001 0.840 0.340
RER 0.89±0.04 0.87±0.05 0.87±0.05 0.86±0.05 0.87±0.04 0.97±0.04 0.97±0.04 0.98±0.03 0.96±0.05 0.97±0.03 0.001 0.280 0.578
Mean VO2(ml/kg/min) 51.3±7.2 52.6±8.0 54.1±6.7 55.2±11.1 53.3±7.8 52.0±7.4 52.7±7.1 51.9±7.0 49.7±10.5 51.6±7.2 0.012 0.857 0.168
Mean VO2(%VO2max) 82.2±6.6 84.2±8.0 86.9±8.3 88.2±12.9 85.4±7.8 84.4±7.6 85.6±4.7 84.3±5.7 80.8±13.7 83.8±6.0 0.340 0.836 0.187
VE(L/min) 86.9±24.3 87.8±26.6 93.0±22.1 99.0±29.3 91.7±24.2 93.5±13.5 93.3±9.7 93.3±11.1 95.0±26.1 93.8±13.1 0.743 0.424 0.472
RR(bpm) 42.7±6.6 42.4±6.7 43.0±6.2 43.4±7.2 42.9±6.6 44.7±7.9 44.9±8.6 44.3±7.6 44.9±7.7 44.7±7.7 0.029 0.923 0.720
Mean CarbohydrateOxidation (g/min) 3.0±0.9 2.9±1.1 3.0±0.9 2.9±1.3 2.9±1.0 4.4±0.9 4.4±1.1 4.6±1.0 4.1±1.4 4.4±0.9 0.001 0.618 0.753
Mean Fat Oxidation (g/min) 0.63±0.15 0.71±0.23 0.71±0.15 0.78±0.26 0.71±0.18 0.14±0.18 0.14±0.24 0.08±0.18 0.17±0.20 0.13±0.16 0.001 0.156 0.586
Heart Rate(b.min-1) 172±13 175±10 172±13 172±15 173±12 171±12 171±13 168±14 167±16 169±13 0.051 0.349 0.696
Time(sec) 1231±137 1217±153 1198±116 1211±152 1214±135 1182±119 1185±138 1203±143 1223±175 1198±130 0.301 0.920 0.282
LCHF, low carbohydrate high fat; HCLF, high carbohydrate low fat; COND= Condition; HR = heart rate; RER = Respiratory exchange ratio; VO2 = oxygen consumption; VCO2 = carbon dioxide production; VE = ventilation; RR = Respiratory Rate.