Changes in the leucocyte count during and after brief intense exercise.
Twelve healthy male volunteers exercised at 200 W on a cycle ergometer for 8 min or until exhausted, if sooner. Retrospectively, subjects fell into two groups. During the last minute of exercise at 200 W, those in group 1 (n = 5) had a mean respiratory exchange ratio (R) of 1.06 (SD 0.01) and were working at a mean of 79% (SD 4%) of their maximum oxygen consumption (VO2max) as measured in a separate incremental load test. For subjects in group 2 (n = 7), R was 1.31 (SD 0.08) and their VO2 was maximal (mean 101%. SD 3%). Plasma lactate, and adrenaline concentrations rose to higher levels during exercise in subjects in group 2 than in those in group 1. At the finish of exercise, the leucocyte count and the plasma lactate concentration immediately began to fall in subjects in group 1 whereas in group 2 subjects both rose for several minutes before falling. Plasma catecholamine concentrations fell rapidly in both groups during recovery.
McCarthy
D A
DA
School of Biological Sciences, Queen Mary and Westfield College, London, UK.
Macdonald
I A
IA
Shaker
H A
HA
Hart
P
P
Georgiannos
S
S
Deeks
J
J
Wade
A J
AJ
D000328:Adult; D001810:Blood Volume / Q000502:physiology; D004837:Epinephrine / Q000097:blood; D015444:Exercise / Q000502:physiology*; D006728:Hormones / Q000097:blood; D006801:Humans; D007773:Lactates / Q000097:blood; D007958:Leukocyte Count; D007962:Leukocytes / Q000502:physiology*; D008297:Male; D009638:Norepinephrine / Q000097:blood; D010101:Oxygen Consumption / Q000502:physiology; D011659:Pulmonary Gas Exchange / Q000502:physiology
D006728:Hormones; D007773:Lactates; D009638:Norepinephrine; D004837:Epinephrine