Bilateral muscle strength symmetry and performance are improved following walk training with restricted blood flow in an elite paralympic sprint runner: Case study.

Autor: Salvador AF; Human Performance Research Group, Center for Health and Sport Sciences, Santa Catarina State University, Florianópolis, Brazil. Electronic address: amadeofelixsalvador@gmail.com., Schubert KR; Human Performance Research Group, Center for Health and Sport Sciences, Santa Catarina State University, Florianópolis, Brazil., Cruz RS; Human Performance Research Group, Center for Health and Sport Sciences, Santa Catarina State University, Florianópolis, Brazil., Corvino RB; Human Performance Research Group, Center for Health and Sport Sciences, Santa Catarina State University, Florianópolis, Brazil., Pereira KL; Human Performance Research Group, Center for Health and Sport Sciences, Santa Catarina State University, Florianópolis, Brazil., Caputo F; Human Performance Research Group, Center for Health and Sport Sciences, Santa Catarina State University, Florianópolis, Brazil., de Oliveira MF; Human Performance Research Group, Center for Health and Sport Sciences, Santa Catarina State University, Florianópolis, Brazil.
Jazyk: angličtina
Zdroj: Physical therapy in sport : official journal of the Association of Chartered Physiotherapists in Sports Medicine [Phys Ther Sport] 2016 Jul; Vol. 20, pp. 1-6. Date of Electronic Publication: 2015 Oct 21.
DOI: 10.1016/j.ptsp.2015.10.004
Abstrakt: Objectives: Investigate the influence of 4 weeks of walk training with blood flow restriction (BFR) on muscle strength, metabolic responses, 100-m and 400-m performances in an athlete with cerebral palsy.
Methods: An elite Paralympic sprinter (20 years, 176 cm, 64.8 kg) who presented with moderate hemiplegic cerebral palsy (right side impaired) completed four visits before and after 4 weeks of the BFR training: 1) anthropometric measurements, familiarization of maximal voluntary contraction (MVC), and an incremental test; 2) MVC measurements; 3) 400-m performance, and 4) 100-m performance. The walk training with BFR consisted of four bouts of 5 min at 40% of maximal aerobic speed with 1 min of passive rest with complete reperfusion.
Results: All performance times were lower with training (100-m: 1%; 400-m: 10%), accompanied by adaptations in aerobic variables (V˙O2max: 6%; OBLA: 24%) and running economy (9-10%). Lactic acid energy metabolism was reduced (25-27%), even in the presence of a higher lactate efflux from the previously active muscles after training. MVC (right leg: 19%; left leg: 9%) increased in both legs unevenly, decreasing the muscle strength asymmetry between limbs.
Conclusions: These results indicate that cardiovascular and neuromuscular adaptations can be simultaneously induced following BFR training in a paralympic sprinter.
(Copyright © 2015 Elsevier Ltd. All rights reserved.)
Databáze: MEDLINE
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