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Relationship between Lower -Limb Joint Angle and Muscle Activity due to Saddle Height during Cycle Pedaling
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 Title & Authors
Relationship between Lower -Limb Joint Angle and Muscle Activity due to Saddle Height during Cycle Pedaling
Seo, Jeong-Woo; Choi, Jin-Seung; Kang, Dong-Won; Bae, Jae-Hyuk; Tack, Gye-Rae;
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 Abstract
The purpose of this study was to investigate the effects of different saddle heights on lower-limb joint angle and muscle activity. Six elite cyclists(age: , height: , weight: , cycle career: ) participated in three min. submaximal(90 rpm) pedaling tests with the same load and cadence based on saddle heights where subject's saddle height was determined by his knee flexion angle when the pedal crank was at the 6 o'clock position. Joint angles(hip, knee, ankle joints) and the activity of lower limb muscles(biceps femoris(BF), vastus lateralis(VL), tibialis anterior(TA) and gastrocnemius medial(GM)) were compared by measuring 3D motion and electromyography(EMG) data. Results showed that there were significant differences in minimum hip & knee joint angle and range of motion of hip and knee joint between saddle heights. Onset timing and integrated EMG of only BF among 4 muscles were significantly different between saddle heights. Especially there was a negative relationship between minimum hip joint angle and onset timing of BF in most subject, which means that onset timing of BF became fast as the degree of bending of the hip joint became larger by saddle height. Optimal pedaling will be possible through increased amount of muscle activation due to the appropriate burst onset timing by proper pedaling posture with adjusted saddle height.
 Keywords
Pedaling;Saddle Height;Joint Angle;On-set Timing;Integrated EMG;Correlation Coefficient;
 Language
Korean
 Cited by
1.
Differences in the Joint Movements and Muscle Activities of Novice according to Cycle Pedal Type, Korean Journal of Sport Biomechanics, 2016, 26, 2, 237  crossref(new windwow)
2.
Comparison of Biomechanical Characteristics for the Skill Level in Cycle Pedaling, Korean Journal of Sport Biomechanics, 2016, 26, 1, 11  crossref(new windwow)
3.
Saddle Height Determination by Effectiveness of Pedal Reaction Force during Cycle Pedaling, Korean Journal of Sport Biomechanics, 2014, 24, 4, 417  crossref(new windwow)
4.
Effects of Increased Saddle Height on Length and Activity Pattern of Vastus Lateralis and Biceps Femor is Muscle, Korean Journal of Sport Biomechanics, 2012, 22, 4, 413  crossref(new windwow)
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