Ventilatory responses to exercise in divers and non-divers
1974; Elsevier BV; Volume: 20; Issue: 2 Linguagem: Inglês
10.1016/0034-5687(74)90101-7
ISSN1872-7611
AutoresD A Lally, F. W. Zechman, Ryan Tracy,
Tópico(s)High Altitude and Hypoxia
ResumoThe initial (neurogenic) and steady-state ventilatory responses to three levels of treadmill exercise (+10% grade; 1.6, 3.2 and 4.8 km/hr) were studied in divers, sedentary non-divers, and non-diving athletes. The steady-state ventilatory responses of divers were lower than the sedentary group, significantly so at 3.2 and 4.8 km/hr where the differences were 20% of the sedentary values. The initial responses of divers were also lower, but with marginal significance. Both initial and steady-state responses of athletes were intermediate between divers and sedentary non-divers. Both divers and athletes tended to have higher pa(q, and lower R values than sedentary non-divers; divers more so than athletes. Divers showed a markedly slower and deeper breathing pattern than the other two groups. We suggest that the unusual ventilatory behavior of divers is not fitness-related, reflects more than reduced chemosensitivity, and may involve a conditioned response phenomenon.
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