Key result
Hypoxic exercise significantly increased minute ventilation and arterial plasma noradrenaline compared to normoxic exercise and rest.
Why the study?
Does hypoxic exercise increase arterial catecholamines and minute ventilation compared to normoxic exercise in normal men?
Does hypoxic exercise increase arterial catecholamines and minute ventilation compared to normoxic exercise in normal men?
Increased concentrations of arterial plasma noradrenaline may contribute to the hypoxic potentiation of the respiratory response to moderate exercise.
Answers are grounded in this paper and cite their sources.
No immediate clinical implications in healthy men; hypothesis-generating for noradrenergic modulation of hypoxic ventilatory responses.
We measured the minute ventilation and arterial blood catecholamine concentrations in four normal men standing and at two levels of moderate treadmill exercise breathing 14% oxygen or air. 2. Minute ventilation was significantly higher during hypoxic exercise than during normoxic exercise at an oxygen uptake of 1500 ml/min. 3. Arterial plasma noradrenaline during hypoxic exercise at an oxygen uptake of 1500 ml/min was significantly greater than at rest. 4. Arterial plasma noradrenaline during normoxic exercise at an oxygen uptake of 1500 ml/min was not elevated above the resting concentration. 5. The results are compatible with the suggestion that increased concentrations of arterial plasma noradrenaline contribute to the hypoxic potentiation of the respiratory response to moderate exercise.
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Clancy et al. (1975) studied Healthy volunteers (n=4). Hypoxic exercise (14% oxygen) vs. Normoxic exercise (air) and rest was evaluated on Minute ventilation and arterial plasma noradrenaline. Hypoxic exercise significantly increased minute ventilation and arterial plasma noradrenaline compared to normoxic exercise and rest.
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