title: Electromyographic analysis of thigh muscles during track cycling on a velodrome.
abstract: We aimed to investigate neuromuscular activation of thigh muscles during track cycling at various speeds. Eight male competitive cyclists volunteered to participate in this study. Surface electromyography of the vastus lateralis, biceps femoris and adductor magnus muscles of the bilateral legs was recorded during track cycling on velodromes with a 250-m track. The participants were instructed to maintain three different lap times: 20, 18 and 16 s. The average rectified value (ARV) was calculated from the sampled surface electromyography. Significantly higher ARVs were observed in the right compared to left leg for the biceps femoris muscle during both straight and curved sections at 18- and 16-s lap times (P < 0.05). In the biceps femoris muscle, significant changes in ARVs during the recovery phase with an increase in speed were seen in the right leg only (P < 0.05). There were no significant differences in ARVs between the straight and curved sections for all three muscles (P > 0.05). From our findings, it was suggested that during track cycling on a velodrome the laterality of the biceps femoris muscle activity is a key strategy to regulate the speed, and fixed neuromuscular strategies are adopted between straight and curved sections for thigh muscles.
authors.affiliation: a Laboratory of Neuromuscular Biomechanics, School of International Liberal Studies , Chukyo University , Nagoya , Japan.
authors.forename: Kohei
authors.initials: K
authors.lastname: Watanabe
authors.affiliation: b Gunma National College of Technology , Maebashi , Japan.
authors.forename: Takayuki
authors.initials: T
authors.lastname: Sato
authors.affiliation: c Tokyo University of Science , Tokyo , Japan.
authors.forename: Takahiro
authors.initials: T
authors.lastname: Mukaimoto
authors.affiliation: d Hachinohe Gakuin University , Aomori , Japan.
authors.forename: Wataru
authors.initials: W
authors.lastname: Takashima
authors.affiliation: e Laboratory of Sports Biomechanics , Nippon Sport Science University , Tokyo , Japan.
authors.forename: Michio
authors.initials: M
authors.lastname: Yamagishi
authors.affiliation: e Laboratory of Sports Biomechanics , Nippon Sport Science University , Tokyo , Japan.
authors.forename: Tetsunari
authors.initials: T
authors.lastname: Nishiyama
mesh_terms: D000054:Acceleration; D001642:Bicycling / Q000502:physiology*; D004576:Electromyography; D004777:Environment; D006801:Humans; D007866:Leg / Q000502:physiology; D008297:Male; D018482:Muscle, Skeletal / Q000294:innervation / Q000502:physiology*; D013848:Thigh / Q000502:physiology*; D013996:Time and Motion Studies; D055815:Young Adult
keywords: Track cyclist; hamstrings muscles; hip adductor muscles; quadriceps femoris muscles