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Int J Sports Med 1987; 08(5): 315-322
DOI: 10.1055/s-2008-1025676
© Georg Thieme Verlag Stuttgart · New York

Metabolic Changes During Volleyball Matches*

U. Künstlinger, H. G. Ludwig, J. Stegemann
  • Institute of Physiology, Deutsche Sporthochschule Köln, Cologne, FRG
* The study was supported by grants of Bundesinstitut für Sportwissenschaften, Köln
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Publication History

Publication Date:
14 March 2008 (online)

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Abstract

Urinary and/or serum concentrations of electrolytes (sodium, potassium, calcium, magnesium), hormones (aldosterone, cortisol, catecholamines), and metabolic parameters (lactate, glucose, free fatty acids) were determined during different volleyball matches.

While [Na+]s was slightly increased - not exceeding the hemoconcentration effect - [K+]s, [Mg2+]s, and [Ca2+]s were diminished after the matches. Due to a lowered glomerular filtration rate (GFR), urinary excretion of water, sodium, and potassium was decreased. In addition, the tubular resorption and secretion of fluid and electrolytes was influenced by different hormones leading to a lowered [Na+]u and an increase of [K+]u after exercise.

Low concentrations of lactate (2.54±1.21 mmol/l) during and after the matches and an increase of [FFA]s indicate that energy during the short exercise periods (9 s) is mainly supplied by a breakdown of creatine phosphate, while aerobic pathways restore the energy sources during the resting periods (12 s).

Serum concentrations of aldosterone and cortisol as well as the excretion of adrenaline are enhanced on the same scale as after endurance sports. The excretion of noradrenaline corresponds to values during exercise of high intensity.

Key words

volleyball - electrolytes - urinary excretion - hormones - energy supply

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