Table 2 Exercise results.
| Parameter | Intensity | NoMG | MG V | MG C | p-value |
|---|---|---|---|---|---|
| VO 2 (ml×min −1 ) | sub | 4461 (533) | 4589 (570) | 4697 (530) | n.s. |
| (4139–4783) | (4245–4934) | (4376–5017) | |||
| max | 4541 (575) | 4608 (612) | 4747 (598) | n.s. | |
| (4193–4888) | (4238–4978) | (4386–5108) | |||
| VCO 2 (l×min −1 ) | sub | 4895 (626) | 5042 (611) | 5045 (491) | n.s. |
| (4517–5272) | (4673–5411) | (4748–5342) | |||
| max | 5131 (640) | 5131 (690) | 5159 (646) | n.s. | |
| (4745–5518) | (4714–5548) | (4769–5549) | |||
| HR (bpm) | sub | 183.8 (7.8) | 183.4 (6.6) | 182.0 (5.9) | n.s. |
| (178.8–188.8) | (179.2–187.6) | (178.2–185.7) | |||
| max | 184.4 (5.9) | 183.7 (5.7) | 182.6 (6.1) | n.s. | |
| (180.6–188.1) | (180.1–187.3) | (178.7–186.4) | |||
| VE (l×min −1 ) | sub | 135.2 (17.2) | 135.6 (16.4) | 137.3 (21.1) | n.s. |
| (124.8–145.6) | (125.7–145.5) | 128.0–146.6) | |||
| max | 143.8 (16.7) | 139.5 (18.4) | 142.6 (23.7) | n.s. | |
| (133.7–153.9) | (128.4–150.6) | (128.0–146.6) | |||
| BR (breath×min −1 ) | sub | 47.6 (8.2) | 46.9 (6.3) | 47.6 (5.0) | n.s. |
| (42.6–52.5) | (43.1–50.7) | (44.5–50.7) | |||
| max | 50.7 (6.1) | 47.9 (4.7) | 49.1 (5.9) | n.s. | |
| (47.0–54.3) | (45.1–50.8) | (44.5–50.7) | |||
| VT (l) | sub | 2.92 (0.57) | 2.95 (0.53) | 2.92 (0.48) | n.s. |
| (2.58–3.26) | (2.63–3.27) | (2.63–3.21) | |||
| max | 2.90 (0.54) | 2.95 (0.49) | 2.94 (0.51) | n.s | |
| (2.57–3.22) | (2.65–3.24) | (2.63–3.25) | |||
| RQ | sub | 1.10 (0.10) | 1.10 (0.10) | 1.08 (0.07) | n.s. |
| (1.04–1.16) | (1.05–1.16) | (1.04–1.12) | |||
| max | 1.13 (0.08) | 1.12 (0.10) | 1.09 (0.09) | n.s. | |
| (1.08–1.18) | (1.06–1.18) | (1.05–1.13) | |||
| FeO 2 (vol%) | sub | 15.64 (0.61) | 15.57 (0.39) | 15.63 (0.48) | n.s. |
| (15.27–16.01) | (15.34–15.81) | (15.34–15.92) | |||
| max | 15.84 (0.49) | 15.57 (0.32) | 15.65 (0.50) | n.s. | |
| (15.54–16.13) | (15.37–15.76) | (15.36–15.94) | |||
| FeCO 2 (vol%) | sub | 5.91 (0.73) | 6.00 (0.69) | 5.89 (0.60) | n.s. |
| (5.48–6.35) | (5.57–6.40) | (5.53–6.25) | |||
| max | 5.85 (0.62) | 5.85 (0.81) | 5.89 (0.588) | n.s. | |
| (5.47–6.22) | (5.36–6.35) | (5.53–6.24) | |||
| Inspiratory time (s) | sub | 0.63 (0.10) | 0.64 (0.08) | 0.61 (0.08) | n.s. |
| (0.57–0.69) | (0.59–0.69) | (0.56–0.66) | |||
| max | 0.58 (0.07) | 0.62 (0.06) | 0.60 (0.08) | n.s. | |
| (0.54–0.62) | (0.58–0.66) | (0.56–0.65) | |||
| Expiratory time (s) | sub | 0.67 (013) | 0.67 (0.11) | 0.65 (0.11) | n.s. |
| (0.59–0.76) | (0.60–0.73) | (0.58–0.71) | |||
| max | 0.62 (0.10) | 0.65 (0.08) | 0.64 (0.10) | n.s. | |
| (0.56–0.68) | (0.60–0.70) | (0.58–0.70) | |||
| Velocity (km×h −1 ) | sub | 15.08 (1.32) | |||
| max | 15.54 (1.05) | 15.38 (1.39) | 15.23 (1.36) | n.s. | |
| (14.90–16.17) | (14.55–16.22) | (14.41–16.05) | |||
| Blood lactate (mmol×l −1 ) | pre | 0.85 (0.19) | 0.75 (0.14) | 0.74 (0.11) | n.s. |
| (0.73–0.97) | (0.66–0.83) | (0.67–0.81) | |||
| max | 10.42 (2.27) | 8.94 (1.89)* | 9.42 (2.39)* | 0.002 (NoMG vs. MG V ) | |
| (9.06–11.79) | (7.82–10.06) | (7.98–10.86) | 0.04 (NoMG vs. MG C ) | ||
| AT lac (km×h −1 ) | 10.6 (1.5) | 10.6 (1.5) | 10.9 (1.0) | n.s. | |
| (9.71–11.52) | (9.71–11.52) | (10.3–11.55) | |||
Mean value (SD) and confidence interval in brackets. Maximum values (max): mean values corresponding to the highest speed in each test series (NoMG, MGV, MGC). Submaximum values (sub): mean values corresponding to the series (NoMG, MGV, MGC) with the lowest maximum speed. Pre: pre-exercise values. ATlac (anaerobic lactate threshold): running speed corresponding to the lactate minimum (18) in Test B. * = significant.