Your browser doesn't support javascript.
loading
Mostrar: 20 | 50 | 100
Resultados 1 - 2 de 2
Filtrar
Mais filtros











Base de dados
Intervalo de ano de publicação
1.
Wilderness Environ Med ; 19(3): 151-6, 2008.
Artigo em Inglês | MEDLINE | ID: mdl-18715126

RESUMO

OBJECTIVE: Maximum aerobic capacity decreases at high altitude. This study was conducted to compare the changes in maximum aerobic capacity in men and women mountaineering trainees on induction to high altitude at 4350 m by trekking. METHODS: Eight men and 8 women mountaineering trainees in a mountaineering course were selected for the study. The initial study was conducted at 2100 m (586 mm Hg) and then during 6 to 7 days of sojourn at 4350 m (435 mm Hg). Maximum oxygen consumption (VO(2max)), maximum heart rate (HR(max)), pulse arterial oxygen saturation (SaO(2)), and maximum ventilation (VE(max)) were measured. RESULTS: VO(2max), HR(max), duration of work (minutes), and SaO(2) saturation decreased significantly (P < .05) with increasing altitude in both sexes. Conversely, VE(max) and ventilatory equivalent (VE/VO(2)) increased significantly (P < .05). Men showed a relatively higher value of maximum exercise variables (total exercise time, exercise intensity, and VO(2)) than women trainees at both altitude locations. The decrement of VO(2max) was 13% in women and 17% in men (P < .05). CONCLUSIONS: The results indicate that the decrement of maximum aerobic capacity at 4350 m was less in women than in men under similar modes of ascent.


Assuntos
Exercício Físico/fisiologia , Frequência Cardíaca/fisiologia , Montanhismo , Consumo de Oxigênio/fisiologia , Ventilação Pulmonar/fisiologia , Altitude , Feminino , Humanos , Masculino , Montanhismo/fisiologia , Fatores Sexuais , Adulto Jovem
2.
High Alt Med Biol ; 4(3): 341-8, 2003.
Artigo em Inglês | MEDLINE | ID: mdl-14561239

RESUMO

To test the hypothesis that the changes in hypoxic ventilatory response (HVR) of men and women mountaineers on induction to HA by trekking is not influenced by gender, isocapnic HVR as DeltaV(E)/DeltaSa(O2) was studied in eight men and eight women mountaineering trainees initially at 2100 m, then during 6 to 7 days of sojourn at 4350 m, and retested again on return to 2100 m. Results indicated that HVR at 2100 m increased significantly at 4350 m in both sexes, and the values reverted to baseline level within 4 to 5 days between leaving high altitude (4350 m) and restudy at 2100 m. No sex differences were observed at 2100- or at 4350-m altitude, indicating that men and women have a similar level of chemosensitive response as measured by HVR during induction to HA.


Assuntos
Aclimatação/fisiologia , Altitude , Hipóxia/fisiopatologia , Montanhismo/fisiologia , Ventilação Pulmonar/fisiologia , Adolescente , Adulto , Dióxido de Carbono/metabolismo , Feminino , Humanos , Masculino , Consumo de Oxigênio/fisiologia , Fatores Sexuais
SELEÇÃO DE REFERÊNCIAS
DETALHE DA PESQUISA