PMID: 6538838Jan 1, 1984Paper

Serum enzyme variations in men during an exhaustive "square-wave" endurance exercise test

European Journal of Applied Physiology and Occupational Physiology
M Gimenez, M Florentz

Abstract

The present study was designed to test if both the intensity and duration of the 45-min Square-Wave Endurance Exercise Test (SWEET) would produce changes in serum enzyme activities. Nine men, four sedentary (S) and five athletes (A), performed VO2 max and SWEET, at their Maximal Intensity of Endurance (MIE45) as defined by maximal heart rate and the impossibility of maintaining MIE 45 + 5% for 45 min. Arterial blood was sampled at rest (R), exercise (Ex) (45th min) and during recovery (15th min) for measurements of levels of Haemoglobin (Hb), Haematocrit (Hct), pH and seven serum enzymes: Creatine kinase (CPK), Hexose-phosphate isomerase (PHI), Aldolase (ALD), Lactate dehydrogenase (LDH), Malate dehydrogenase (MDH), Aspartate amino-transferase (ASAT or GOT), and Alanine aminotransferase (ALAT or GPT). Five enzymes increased significantly during exercise (MIE45), the delta % (Ex - R/R) increases were as follows: PHI (72%), MDH (28%), LDH (21%), CPK (17%), and GOT (13.5%), whilst only a 10% increase was observed for Hct and Hb and there was no significant change in the arterial pH. There was no correlation between the delta % of Hb, Hct, pH, and the results for the enzymes. Thus, it does not seem that haemoconcentration and arter...Continue Reading

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Citations

Mar 1, 1989·Pflügers Archiv : European journal of physiology·T E TakalaK Väänänen
Jan 1, 1992·Visual Neuroscience·A B Watson
Jul 1, 1991·Visual Neuroscience·H Kolb
Jul 5, 2012·American Journal of Physical Medicine & Rehabilitation·Manuel GimenezEmilio Servera

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