Table 1. HR, MAP, CO , O, aCO, and external ear temperature during rest, exercise and recovery periods. Values are means (±SE). |
|
|
Exercise period |
|
|
Rest |
6 min |
16±2 min |
24±3 min |
recovery |
| Control condition |
HR (bpm) |
66 (3) |
140 (5)* |
165 (5)* |
168 (5)* |
106 (6)* |
|
MAP (mmHg) |
96 (6) |
128 (4)* |
125 (5)* |
118 (5)* ‡ |
89 (4) |
|
PETCO2 (mmHg) |
38 (1) |
45 (2)* |
38 (1) |
36 (1)* |
33 (1)* |
|
PETO2 (mmHg) |
108 (2) |
109 (2) |
113 (2)* |
14 (2)* |
117 (1)* |
|
PaCO2(mmHg) |
39 (1) |
42 (2) |
36 (1)* |
33 (1)* |
31 (1)* |
|
External ear temperature (°C) |
35.9 (.2) |
36.2 (.0) |
36.7 (.2)* |
36.8 (.3)* |
36.6 (.2)* |
| Heat condition |
HR (bpm) |
75 (3)† |
152 (4)* |
170 (4)* |
- |
123 (7)*† |
|
MAP (mmHg) |
89 (3) |
118 (5)* |
107 (6)*† |
- |
82 (3) |
|
PETCO2 (mmHg) |
37 (1) |
43 (1)* |
36 (1) |
- |
32 (1)* |
|
PETO2 (mmHg) |
108 (2) |
110 (2) |
115 (2)* |
- |
116 (2)* |
|
PaCO2(mmHg) |
37 (1) |
40 (1) |
34 (1)* |
- |
32 (1)* |
|
External ear temperature (°C) |
36.5 (.2)† |
36.8 (.1) |
37.5 (.1)*† |
- |
37.7 (.1) *† |
|
HR, heart rate; MAP, mean arterial pressure; CO, end-tidal partial pressure of CO; O, end-tidal partial pressure of O; aCO, arterial partial pressure of CO. |
* p < 0.05 vs. resting baseline. |
† p < 0.05 control condition vs heat condition in the same period. |
‡ p < 0.05 control condition vs heat condition at exhaustion (16 min in heat condition vs 24 min in control condition). |
|