Neuromuscular activation pattern of lower extremity muscles during pedaling in cyclists with single amputation of leg and with two legs: a case study

Autor:	Tetsunari Nishiyama, Kohei Watanabe, Yuta Yamaguchi, Wataru Fukuda, Taishi Kenjo, Sho Nakazawa
Jazyk:	angličtina
Rok vydání:	2020
Předmět:	Adult Male Quadriceps muscle medicine.medical_specialty medicine.medical_treatment lcsh:Medicine Rectus femoris muscle Electromyography Prosthesis General Biochemistry Genetics and Molecular Biology Activation pattern Amputation Surgical 03 medical and health sciences 0302 clinical medicine Physical medicine and rehabilitation Paralympic medicine Humans Muscle Skeletal lcsh:Science (General) lcsh:QH301-705.5 Leg amputation Leg medicine.diagnostic_test business.industry lcsh:R VO2 max 030229 sport sciences General Medicine Bicycling body regions Research Note Biceps femoris muscle Amputation lcsh:Biology (General) Central nervous system Athletes Rectus femoris business human activities 030217 neurology & neurosurgery lcsh:Q1-390
Zdroj:	BMC Research Notes, Vol 13, Iss 1, Pp 1-7 (2020) BMC Research Notes
ISSN:	1756-0500
DOI:	10.1186/s13104-020-05144-9
Popis:	Objective In Para-cycling competitions, cyclists with amputation of one-leg and no prosthesis, i.e., Division Cycle, Sport Class C2, perform pedaling movement on bicycle by unilateral leg. The purpose of this study was to describe neuromuscular activation of lower extremity muscles in two cyclists with single leg amputation and one cyclist with two legs during pedaling. We compared averaged rectified values (ARV) of surface electromyography for lower extremity muscles during crank cycle for two single leg cyclists with one cyclist with two legs at 65%, 80%, and 95% of VO2 max. Results Characteristic features of cyclists with single amputation of leg were increases in ARV for proximal region of the rectus femoris muscle in first half of pulling phase, increases in ARV for the biceps femoris muscle in first half of pulling phase, and increases in ARV for the medial gastrocnemius muscle in pulling phase. These findings in this study suggest that cyclists with single amputation of leg use characteristic neuromuscular coordination in the muscles contributing to hip and knee flexion joint moments during pulling phase and this may be the strategy in cyclists with single amputation of leg to compensate lack of hip and/or knee extension torque from contralateral leg.
Databáze:	OpenAIRE
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