Greater eccentric exercise-induced muscle damage by large versus small range of motion with the same end-point

Author(s)

Fochi, A. G. ; Damas, F. ; Berton, R. ; Alvarez, I ; Miquelini, M. ; Salvini, T. F. ; Libardi, C. A.

• Document type: Journal article
• Source: BIOLOGY OF SPORT; v. 33, n. 3, p. 285-289, 2016.
• Web of Science Citations: 0

Abstract

Several factors can affect the magnitude of eccentric exercise (ECC)-induced muscle damage, but little is known regarding the effect of the range of motion (ROM) in ECC-induced muscle damage. The purpose of this study was to investigate whether elbow flexor ECC with 120 degrees of ROM (from 60 degrees of elbow flexion until elbow full extension - 180 degrees {[}120ROM]) induces a greater magnitude of muscle damage compared with a protocol with 60 degrees of ROM (120-180 degrees of elbow flexion {[}60ROM]). Twelve healthy young men (age: 22 +/- 3.1 years; height: 1.75 +/- 0.05 m; body mass: 75.6 +/- 13.6 kg) performed the ECC with 120ROM and 60ROM using different arms in a random order separated by 2 weeks and were tested before and 24, 48, 72 and 96 h after ECC for maximal voluntary isometric contraction torque (MVC-ISO), ROM and muscle soreness. The 120ROM protocol showed greater changes and effect sizes (ES) for MVC-ISO (-35%, ES: 1.97), ROM (-11.5 degrees, ES: 1.27) and muscle soreness (19 mm, ES: 1.18) compared with the 60ROM protocol (-23%, ES: 0.93; -12%, ES: 0.56; 17 degrees, ES: 0.63; 8 mm, ES: 1.07, respectively). In conclusion, ECC of the elbow flexors with 120 degrees of ROM promotes a greater magnitude of muscle damage compared with a protocol with 60 degrees of ROM, even when both protocols are performed at long muscle lengths. (AU)

• FAPESP's process: 12/24499-1 - The role of the magnitude of muscle damage in hypertrophic responses
• Grantee: Felipe Romano Damas Nogueira
• Support Opportunities: Scholarships in Brazil - Doctorate
• FAPESP's process: 11/22122-5 - Study of the biomechanical, sensorial, cardiorespiratory and quality of life adaptations associated to physical therapy intervention in the fibromyalgic syndrome
• Grantee: Tania de Fatima Salvini
• Support Opportunities: Research Projects - Thematic Grants
• FAPESP's process: 14/19594-0 - The role of muscle damage in muscle protein synthesis modulation
• Grantee: Felipe Romano Damas Nogueira
• Support Opportunities: Scholarships abroad - Research Internship - Doctorate
• FAPESP's process: 13/21218-4 - The role of the magnitude of muscle damage in hypertrophic responses
• Grantee: Cleiton Augusto Libardi
• Support Opportunities: Regular Research Grants