NDLI: Comparison of kinetics, kinematics, and electromyography during single-leg assisted and unassisted cycling.

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Comparison of kinetics, kinematics, and electromyography during single-leg assisted and unassisted cycling.

Content Provider	World Health Organization (WHO)-Global Index Medicus
Author	Bini, Rodrigo R. Jacques, Tiago C. Lanferdini, Fábio J. Vaz, Marco A.
Description	Country affiliation: Brazil Author Affiliation: Bini RR ( 1School of Physical Education of the Army, Center of Physical Training of the Army, Rio de Janeiro, Brazil)
Abstract	To use single-leg cycling training for varying populations, it is important to understand whether a counterweight attached to the contralateral crank during single-leg cycling drills replicates the effects of the opposite leg in the ipsilateral leg. Therefore, we compared single-leg assisted cycling using a counterweight on the contralateral crank for joint kinetics, kinematics, and lower-limb muscle activation. Fourteen healthy nonathletes performed 2 bilateral cycling trials (240 ± 23 W and 90 ± 2 rpm) and 2 single-leg trials (120 ± 11 W and 90 ± 2 rpm) for measurements of pedal force, joint kinematics, and muscle activation of their right lower limb. For 1 single-leg trial, a custom-made adaptor was used to attach 10 kg of weight to the contralateral leg. Total force applied on the pedal, pedal force effectiveness, the mean joint angles and range of motion, mechanical work at the crank, hip, knee, and ankle joints, electromyography, pedaling cadence, and right crank mechanical work were assessed. Biceps femoris (87%), vastus lateralis (15%), rectus femoris (57%), tibialis anterior (57%), and gastrocnemius medialis (12%) activations were larger in the single-leg assisted trial compared with the bilateral trial. Lower total pedal force (17%) and increased index of effectiveness (16%) also indicate mechanical differences in single-leg cycling using a counterweight on the contralateral crank than conventional bilateral cycling. Single-leg assisted training should be used with caution because of potential differences in muscle recruitment and pedaling kinetics compared with bilateral cycling.
File Format	HTM / HTML
ISSN	10648011
Issue Number	6
Volume Number	29
e-ISSN	15334287
Journal	Journal of Strength and Conditioning Research
Language	English
Publisher	Lippincott Williams & Wilkins
Publisher Date	2015-06-01
Publisher Place	United States
Access Restriction	One Nation One Subscription (ONOS)
Subject Keyword	Discipline Sport Sciences Lower Extremity Physiology Muscle, Skeletal Adult Ankle Joint Biomechanical Phenomena Electromyography Exercise Test Hip Joint Humans Kinetics Knee Joint Range Of Motion, Articular Young Adult Comparative Study Journal Article Research Support, Non-u.s. Gov't
Content Type	Text
Resource Type	Article
Subject	Orthopedics and Sports Medicine Physical Therapy, Sports Therapy and Rehabilitation Sports Science

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