Table 3.
Arterial plasma hormone and metabolite concentrations in the basal state and during 60 min arm cycling at ∼60 %V̇O2,peak
| Basal | Exercise | ||||||
|---|---|---|---|---|---|---|---|
| 15 min | 45 min | 7 min | 22 min | 37 min | 52 min | ||
| Insulin (pM) *§ | SCI | 45 ± 6 | 48 ± 7 | 49 ± 6 | 43 ± 8 | 34 ± 8 | 30 ± 6 |
| Healthy | 26 ± 3 | 26 ± 4 | 31 ± 4 | 29 ± 2 | 28 ± 2 | 22 ± 3 | |
| Cortisol (nm)§ | SCI | 152 ± 28 | 199 ± 46 | 170 ± 38 | 249 ± 48 | 287 ± 52 | 321 ± 51 |
| Healthy | 263 ± 53 | 227 ± 52 | 268 ± 63 | 349 ± 72 | 334 ± 76 | 323 ± 75 | |
| GH (ng ml−1)*§ | SCI | 0.09 ± 0.02 | 0.22 ± 0.12 | 0.94 ± 0.77 | 4.14 ± 1.65 | 7.11 ± 1.69 | 8.33 ± 1.95 |
| Healthy | 1.41 ± 0.78 | 1.98 ± 1.03 | 2.19 ± 0.94 | 10.4 ± 3.9 | 17.3 ± 6.2 | 15.9 ± 5.6 | |
| Glucose (mm)§ | SCI | 5.27 ± 0.14 | 5.25 ± 0.13 | 5.26 ± 0.12 | 4.94 ± 0.20 | 4.75 ± 0.24 | 4.69 ± 0.24 |
| Healthy | 5.51 ± 0.13 | 5.48 ± 0.14 | 5.45 ± 0.16 | 5.34 ± 0.18 | 5.25 ± 0.20 | 5.09 ± 0.17 | |
| FFA (μm)§ | SCI | 652 ± 93 | 620 ± 80 | 454 ± 84 | 424 ± 111 | 409 ± 102 | 459 ± 74 |
| Healthy | 712 ± 113 | 707 ± 135 | 552 ± 143 | 688 ± 223 | 815 ± 274 | 920 ± 297‖ | |
| TG (μm) | SCI | 1259 ± 264 | 1296 ± 287 | 1332 ± 307 | 1316 ± 305 | 1280 ± 303 | 1245 ± 299 |
| Healthy | 1098 ± 164 | 1147 ± 161 | 1177 ± 175 | 1148 ± 179 | 1341 ± 183 | 1127 ± 180 | |
| d-β-Hydroxy-butyrate (μm)§ | SCI | 157 ± 37 | 155 ± 36 | 96 ± 21 | 77 ± 17 | 73 ± 14 | 63 ± 12 |
| Healthy | 380 ± 203 | 350 ± 187 | 229 ± 129 | 181 ± 101 | 161 ± 73 | 150 ± 61 | |
Values are means ±s.e.m. for 6 SCI and 7 healthy subjects.
*
P < 0.05 between groups.
§
Significant change with time.
‖
P < 0.05vs. exercise time 7 min.
GH, growth hormone; FFA, free fatty acids; TG, triglyceride.