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Abstract The aim of the study was to evaluate the responses of insulin-like growth factor 1 (IGF-1), C-reactive protein (CRP), IGF-1/CRP ratio, and skin temperature (Tsk) of the lower limbs (LL) of under-20 elite soccer athletes to a non-contact team sport activity circuit 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 team sport activity circuit with intermittent exercises, jumps, direction shifts, accelerations and decelerations. Plasma concentrations of IGF-1 and CRP were evaluated pre-training session (baseline), and immediately after, and at 3, 24 and 48h following exercise. While the Tsk of the LL was evaluated at baseline, and at 24 and 48h following exercise. Plasma IGF-1 concentrations were greater immediately after, 24 and 48h after the circuit compared to 3h (p< 0.05; ES= 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 at 3h after the activity circuit were lower than those presented in baseline, and immediately after, 24 and 48h after the exercises (p< 0.05; ES= 0.53, 0.65, 0.56 and 0.57, respectively). The hot and neutral zones increased the number of pixels at 24 and 48h after the activity circuit, while the cold zone showed an opposite behavior (p< 0.05). Changes in the values of blood biomarkers and Tsk of the LL suggest that there is possibly an active tissue repair process throughout 48h following exercise. insulinlike insulin like IGF1, IGF1 IGF , (IGF-1) Creactive C reactive CRP, (CRP) IGF1/CRP IGF1CRP IGFCRP 1/CRP ratio (Tsk (LL under20 under 20 under-2 noncontact non contact h 19.0 190 19 0 (19. 10 1. years 743 74 3 74. 713 7 13 7.1 kg 103 10. 22 2 2. F %F 1781 178 178. 66 6 6. cm 563 56 56. 31 3. mL.kg1.min1 mLkg1min1 mLkgmin mL.kg 1.min mL min mL.kg-1.min-1 jumps shifts decelerations IGF- pretraining pre training baseline (baseline) exercise p< p (p 0.05 005 05 ES 066 0.66 072 72 0.7 070 70 0.70 respectively. respectively . respectively) p> 0.05. 0.05) 053 53 0.53 065 65 0.65 056 0.5 057 57 0.57 (IGF-1 (CRP 1CRP under2 under- 19. (19 71 7. 17 5 kg1 min1 mL.kg1.min mLkg mLkg1min 1min mL.kg-1.min- (baseline 0.0 00 06 0.6 07 0. (IGF- (1 mL.kg-1.min (IGF (