Open AccessPlasma catecholamine and blood lactate responses to incremental arm and leg exercise
Author(s) -
Donald A. Schneider,
Tom M. McLellan,
G. C. Gass
Publication year - 2000
Publication title -
medicine and science in sports and exercise
Language(s) - English
Resource type - Journals
eISSN - 1530-0315
pISSN - 0195-9131
DOI - 10.1097/00005768-200003000-00009
Subject(s) - catecholamine , blood lactate , epinephrine , cycling , medicine , venous blood , endocrinology , cardiology , heart rate , blood pressure , archaeology , history
The present study was conducted to examine the pattern of plasma catecholamine and blood lactate responses to incremental arm and leg exercise. Seven untrained male subjects performed two incremental exercise tests on separate days in random order. One test consisted of 1-arm cranking (5W x 2 min(-1)), whereas the other exercise test was 2-leg cycling (20-25W x 2 min(-1)). Blood samples were obtained from the nonexercising arm during 1-arm cranking and from the same arm and vein during 2-leg cycling. Thresholds for blood lactate (T(La)), epinephrine (T(Epi)) and norepinephrine (T(NE)) were determined for each subject under both exercise conditions and defined as breakpoints when plotted as a function of power output.