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 Carbohydrate Oxidation (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. |
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