A single bout of downhill running attenuates subsequent level running-induced fatigue

Author(s)

Assumpcao, Claudio de Oliveira ^[1] ; Barreto, Renan Vieira ^[1] ; Rabello de Lima, Leonardo Coelho ^[1] ; Cardozo, Adalgiso Coscrato ^[2] ; de Lima Montebelo, Maria Imaculada ^[3] ; Camargo Catarino, Helen Reinhart ^[4] ; Greco, Camila Coelho ^[1] ; Denadai, Benedito Sergio ^[1]

Affiliation

^[1] Sao Paulo State Univ, Human Performance Lab, Dept Phys Educ, IB, UNESP, Av 24A, 1-515, BR-13506900 Rio Claro, SP - Brazil

^[2] Sao Paulo State Univ, Dept Phys Educ, Biomech Lab, Rio Claro, SP - Brazil

^[3] Methodist Univ Piracicaba UNIMEP, Grad Program Human Movement Sci, Piracicaba, SP - Brazil

^[4] Univ Ctr Itapira UNIESI, Itapira, SP - Brazil

• Document type: Journal article
• Source: SCIENTIFIC REPORTS; v. 10, n. 1 NOV 2 2020.
• Web of Science Citations: 0

Abstract

Fatigue can be defined as exercise-induced strength loss. During running, fatigue can be partially explained by repetitive low-intensity eccentric contractions-induced muscle damage (EIMD). Previous studies showed that a bout of downhill running (DR) attenuated subsequent EIMD. Thus, we tested if a 30-min DR bout would attenuate fatigue induced by subsequent 60-min level running (LR). Twenty-seven male college students were randomly allocated to an experimental (EXP) or a control (CON) group. All participants performed LR on a treadmill at 70% of the velocity (vVO(2)peak) corresponding to peak oxygen uptake (VO(2)peak). Only EXP performed a 30-min DR (-15%) on a treadmill at 70% vVO(2)peak fourteen days before LR. Indirect EIMD markers and neuromuscular function were assessed before, immediately and 48 h after DR and LR. Knee extension isometric peak torque (IPT) decreased (-36.3 +/- 26%, p<0.05) immediately following DR with full recovery reached 48 h post-DR. Muscle soreness developed (p<0.05) immediately (37 +/- 25 mm) and 48 h (45 +/- 26 mm) post-DR. IPT and rate of torque development (RTD) at late phases (>150 ms) from the onset of muscle contraction decreased significantly (-10.7 +/- 6.1% and from -15.4 to -18.7%, respectively) immediately after LR for the CON group and remained below baseline values (-5.6 +/- 8.5% and from -13.8 to -14.9%, respectively) 48 h post-LR. However, IPT and late RTD were not significantly affected by LR for the EXP group, showing a group x time interaction effect. We concluded that a single DR bout can be used to attenuate fatigue induced by a LR performed fourteen days after. (AU)

• FAPESP's process: 11/19656-8 - Influence of muscle damage on neuromuscle and aerobic fitness indexes
• Grantee: Claudio de Oliveira Assumpção
• Support Opportunities: Scholarships in Brazil - Doctorate