ALTERATIONS IN PEAK TORQUE OCCUR WITHOUT HEMATOLOGICAL CHANGES AFTER MUSCLE FATIGUE

作者：Suzuki Frank Shiguemitsu; Kalytczak Marcelo Martins; Ferreira Palomares Rodrigo Augusto; Paunksnis Marcos Rodolfo; Silva Sergio Matias; Politi Fabiano; Sbampato Adriana Jaime; Serra Andrey Jorge; Evangelista Alexandre Lopes; Alonso Angelica Castilho; Figueira Junior Aylton; Buchan Duncan; Baker Julien Steven; Bocalini Danilo Sales^*

来源：Revista Brasileira de Medicina do Esporte, 2017, 23(3): 180-183.

DOI：10.1590/1517-869220172303171086

• muscle fatigue
• muscle
• skeletal
• muscle strength
• physiology

Introduction: Muscular fatigue during voluntary muscle contractions is a complex and multifactorial phenomenon associated with central changes and adaptations of the neuromuscular system. Objective: The aim of this study was to analyze the changes in both peak torque and hematological parameters in active and inactive healthy subjects following a muscular fatigue protocol. Methods: Twenty-one healthy adult males performed a muscle fatigue protocol (10 sets, 10 repetitions of knee extension at 75% of the maximal isometric torque (MIT), 120 degrees(s-1) and 40 seconds of rest). Hematocrit (Ht), red blood cells (RBC) and leukocytes (L) analysis were evaluated before (B) and after (A) a fatigue test. Results: The inactive group presented impairment only in concentric muscular action of `-41 +/- 4% in relation to the active (-23 +/- 3%) group. No differences were found in hematological parameters in inactive group (Ht, B: 45.00 +/- 0.01 vs. A: 47.00 +/- 0.01; RBC, B: 442 +/- 40 vs. A: 487 +/- 41; L, B: 7,565 +/- 2,878 vs. A: 8,015 +/- 4,224) and the active group (Ht, B: 45.00 +/- 0.63 vs. A: 47.00 +/- 0.01; RBC, B: 477 +/- 30 vs. A: 559 +/- 37; L, B: 6,418 +/- 3,557 vs. A: 6,632 +/- 4,460). Conclusion: Differences were found only in concentric actions between groups. Additionally, there were no relationships found in hematological parameters between groups.

• 出版日期2017-6