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작성일 2016-10-25 조회수 382
파일첨부 Blood_Lactate_during_Recovery_from_Intense.16.pdf
제목
(PB)Blood Lactate during Recovery from Intense Exercise: Impact of Inspiratory Loading

ABSTRACT
CHIAPPA, G. R., B. T. ROSEGUINI, C. N. ALVES, E. L. FERLIN, J. A. NEDER, and J. P. RIBEIRO. Blood Lactate during
Recovery from Intense Exercise: Impact of Inspiratory Loading. Med. Sci. Sports Exerc., Vol. 40, No. 1, pp. 111?116, 2008. Purpose:
It has long been suggested that inspiratory muscle activity may impact blood lactate levels ([Lacj]B) during the recovery from dynamic
exercise. In this study, we tested the hypothesis that inspiratory muscle activation during recovery from intense exercise would
contribute to Laj clearance, thus leading to reduced [Lacj]B. Methods: Twelve healthy men underwent two maximal, incremental
exercise tests on different days. During a 20-min inactive recovery period, they breathed freely or against a fixed inspiratory resistance
of 15 cm H2O. During recovery, pulmonary gas exchange was continuously monitored, and serial samples of arterialized venous blood
were obtained for [Lacj]B, pH, PCO2, and HCO3
j. Results: Subjects presented similar ventilatory and gas-exchange responses at peak
exercise during both experimental conditions. [Lacj]B during recovery was reduced with inspiratory resistance (7.7 T 1 vs 10.4 T 1, 7.8
T 2 vs 10.3 T 2, and 7.3 T 1 vs 9.7 T 2 mM at 5, 7, and 9 min of recovery, respectively; P G 0.05), but no differences were found for
blood acid?base status. Inspiratory resistance was associated with increased metabolic demand (V˙ O2 and V˙ CO2) but improved
ventilatory efficiency, with lower V˙ E/[V˙ CO2] and increased alveolar ventilation. Conclusion: These data are consistent with the notion
that inspiratory muscles may be net consumers of lactate during recovery from intense exercise. Key Words: LACTATE
METABOLISM, EXCESS POSTEXERCISE OXYGEN CONSUMPTION, INSPIRATORY MUSCLES, WORK OF BREATHING

이전글 (PB)The influence of inspiratory muscle work history and specific inspiratory muscle training upon h
다음글 (PB)The effect of inspiratory muscle training upon maximum lactate