Respostas de IGF-1, PCR e temperatura da pele dos membros inferiores de atletas sub-20 de futebol de elite à uma sessão de treino

Abstract

Physiological stress imposed by the training session in elite soccer is related to success in a competitive season, and therefore requires strategies to assess the tissue repair process in order to avoid performance reduction and reduce the risk of injury. The aim of the study was to evaluate the responses of insulin-like growth factor 1 (IGF-1), C-reactive protein (CRP), ratio IGF-1/CRP and skin temperature (Tsk) of the lower limbs (LL) of under-20 elite soccer athletes to a training session throughout 48h. Thirty elite soccer athletes (19.0 ± 1.0 years, 74.3 ± 7.13 kg, 10.3 ± 2.2 %F, 178.1 ± 6.6 cm, 56.3 ± 3.1 mL.kg-1.min-1) were submitted to a training session with a predominance of eccentric actions. Plasma concentrations of IGF-1 and CRP were evaluated pre-training session (baseline), immediately after, and at 3, 24 and 48h following exercise. While the Tsk of the LL was evaluated at baseline, 24 and 48h. Plasma IGF-1 concentrations were greater immediately after, 24 and 48h after the training session compared to 3h (p< 0.05; TE= 0.66, 0.72 and 0.70, respectively). CRP values did not change throughout the study (p> 0.05). When verifying the IGF-1/CRP ratio, the values 3h after the training session were lower than those presented in baseline, immediately after, 24 and 48h after the training session (p< 0.05; TE= 0.53, 0.65, 0.56 and 0.57, respectively). The hot and neutral zones increased the number of pixels 24 and 48h after the training session, while the cold zone showed an opposite behavior (p< 0.05). Changes in the values of IGF-1, IGF-1/CRP ratio, and Tsk of the LL suggest that there is possibly an active tissue repair process throughout 48h following exercise. Furthermore, it may be that CRP is dependent on a certain degree of “body contact” during exercise. This information can be useful to the technical staff to develop monitoring and intervention strategies throughout the tissue repair process due to the physiological demand imposed by training during an elite soccer season.