Table 1. The results of the variables related to ventilatory threshold (VT) and lactate threshold (LT) at different times of day. Values are mean (SD). |
| Variables |
09:00 hours |
14:00 hours |
19:00 hours |
|
|
VT |
LT |
VT |
LT |
VT |
LT |
| Time (sec) |
717 (79) |
448 (121)b |
660 (78 ) |
410 (130)b |
618 (100) |
404 (85)b |
| HR (b.min-1) |
166 (14) |
144 (17)b |
159 (13) |
141 (15)b |
152 (16) |
137 (13)b |
| VE (L.min-1) |
62 (7) |
48 (9)b |
58 (8) |
46 (6)b |
58 (6) |
48 (6)b |
| RER |
1.07 (0.02) |
1.02 (0.02)b |
1.07 (0.03) |
1.01 (0.05)a |
1.07 (0.04) |
1.01 (0.02)a |
| VO2 (ml.min-1) |
2186 (358) |
1792 (417)b |
2066 (301) |
1671 (277)b |
2005 (248) |
1681 (181)b |
| %VO2max
|
68 (6) |
56 (10)b |
64 (5) |
52 (8)b |
63 (6) |
52 (6)b |
|
and denote p < 0.01 and 0.001, respectively, by paired test between VT and LT. |
No significant differences between the times of day by ANOVA. |
HR= heart rate, E= minute ventilation, RER= respiratory exchange ratio, %VO= VO relative to VO max. |
|