Blood lactate changes during exercise at high altitude.
نویسندگان
چکیده
منابع مشابه
Blood lactate changes during exercise at high altitude.
Blood lactate concentrations were measured in 18 normal subjects at the end of an exercise test designed to maintain heart rate at 85% of maximum for 15 minutes. Blood lactate concentrations were reduced at high altitude (4846 m) and correlated positively with basal pH and negatively with basal Pa,O2 levels. Blood lactate concentrations tended to be lower in those subjects on acetazolamide but ...
متن کاملBlood volume changes during three-week residence at high altitude.
Circulating red blood cell volumes were determined by the carbon monoxide method, and plasma volumes were calculated in four men 20, 29, 71, and 75 years old, and two women 29years of age before, during, and after exposure to an altitude of 3800m. In the four youngest subjects there were early increases in hemoglobin concentration during the first days at the stated altitude attributed to decre...
متن کاملRespiratory energetics during exercise at high altitude.
The purpose of this study was to assess the effect of high altitude (HA) on work of breathing and external work capacity. On the basis of simultaneous records of esophageal pressure and lung volume, the mechanical power of breathing (Wrs) was measured in four normal subjects during exercise at sea level (SL) and after a 1-mo sojourn at 5,050 m. Maximal exercise ventilation (VEmax) and maximal W...
متن کاملPoint: the lactate paradox does/does not occur during exercise at high altitude.
To the Editor: The black and white format of the “The lactate paradox does/does not occur during exercise at high altitude” is excellent for a sharp debate. I brought forward a number of studies that could not find the phenomenon and critically looked at studies that did observe the lactate paradox, providing evidence for serious doubt for the lactate paradox to exist. Looking at the comments t...
متن کاملEvidence that reduced skeletal muscle recruitment explains the lactate paradox during exercise at high altitude.
THE STUDIES of Amann et al. (1, 2) provide the final evidence necessary to solve the “lactate paradox” that has haunted the exercise sciences since first described in 1936 (4) and which was the recent focus of a Point:Counterpoint debate (25, 26). In its simplest form the paradox describes the finding of lower than expected blood lactate concentrations during maximal exercise at altitude, espec...
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ژورنال
عنوان ژورنال: Postgraduate Medical Journal
سال: 1987
ISSN: 0032-5473
DOI: 10.1136/pgmj.63.737.177