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Revista Brasileira de Medicina do Esporte

Print version ISSN 1517-8692On-line version ISSN 1806-9940


SANTOS, Ronaldo Vagner Thomatieli; CAPERUTO, Érico Chagas  and  ROSA, Luís Fernando Bicudo Pereira Costa. Effects of increase of overload training on biochemical and hormonal parameters in rats. Rev Bras Med Esporte [online]. 2006, vol.12, n.3, pp.145-149. ISSN 1517-8692.

The training will be efficient if it is intensive enough to promote homeostasis break, adaptation and super compensation consequently. On the other hand, excessive stress conditions induced by exercise may promote undesirable effects. This paper aims to evaluate the effects of the increase in overload training upon some hormonal and biochemical parameters similar to overreaching. The animals were divided in three groups: SED (sedentary animals), MOD (moderate training during six weeks) and EXT (similar training to MOD for four weeks and increase to two and three daily training sessions in the 5th and 6th weeks, respectively). There was an increase in glutamate in EXT group (p < 0.05) in relation to SED and in GLN/GLU ratio in relation to SED and MOD groups (p < 0.05). Moreover, the MOD group presented increase in soleum muscle and liver glycogen and GH plasmatic concentration (p < 0.05), whereas a testosterone decrease was found (p < 0.05) in relation to SED. The EXT group showed similar changes to MOD as to muscle and liver glycogen. The GH concentration in EXT group was smaller than in the MOD group (p < 0.05) and urea increased (p < 0.05) in relation to SED. Thus, we came to the conclusion that the EXT group protocol was not able to induce signs of overreaching in the animals.

Keywords : Glutamine; Overtraining; Super compensation; Rats; stress.

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