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Effects of Increased Saddle Height on Length and Activity Pattern of Vastus Lateralis and Biceps Femor is Muscle
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 Title & Authors
Effects of Increased Saddle Height on Length and Activity Pattern of Vastus Lateralis and Biceps Femor is Muscle
Choi, Jin-Seung; Kang, Dong-Won; Seo, Jeong-Woo; Bae, Jae-Hyuk; Tack, Gye-Rae;
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 Abstract
The purpose of this study was to investigate the effects of increased saddle height on the length and activity pattern of vastus lateralis (VL) and biceps femoris (BF) muscle. To compare the effects of increased saddle height, Preferred (self-selected height of subject) and High saddle height (approximately 5% higher saddle height than self-selected) were used. Seven elite cyclists (career: ) participated in 3 min. sub-maximal pedaling tests under the same cadence (90 RPM) and pedaling power (150 W). Hip and knee joint angles, and the length and activity of VL and BF were compared by measuring 3D motion and electromyography (EMG) data. Results showed that there were significant differences in peak extension timing of the hip joint angle and the range of motion of the hip and knee joint between different saddle heights. Although there were significant differences in muscle length of both muscles with increasing saddle height, the timing and amount of muscle activity differed only at the BF. These findings suggest that the timing and amount of bi-articular muscle activity (i.e. BF) can be altered by changing the saddle height. For practically applying these results, further study is necessary to evaluate the effects of various cadence and the pedaling power with various saddle heights.
 Keywords
Pedaling;Saddle Height;Muscle Length;Muscle Activity Pattern;EMG;
 Language
Korean
 Cited by
 References
1.
Albertus-Kajee, Y. Tucher, R. & Derman, W.(2010). Alternative methods of normalising EMG during cycling. Journal of Electromyography and Kinesiology. 20(6), 1036-1043. crossref(new window)

2.
Bae, J. H., Choi, J. S., Kang, D. W., Seo, J. W., Tack, G. R.(2012). Technical Note : Development of electric riding machine for cycle fitting, Korean Journal of Sports Biomechanics. 22(3), 373-378. crossref(new window)

3.
Bini, R., Hume, P. A. & Croft, J. L.(2011). Effects of bicycle saddle height on knee injury risk and cycling performance, Sports Medicine 41(6), 463-476. crossref(new window)

4.
Cannon, D. T., Kolkhorst, F. W. & Cipriani, D. J.(2007). Effect of pedaling technique on muscle activity and cycling efficiency, European Journal of Applied Physiology. 99(6), 659-664. crossref(new window)

5.
Connick, M. J. & Li, F. X.(2012). The impact of altered task mechanics on timing and duration of eccentric bi-articular muscle contractions during cycling, Journal of Electromyography and Kinesiology. In press.

6.
Hamley, E. J. & Thomas V.(1967). Physiological and postural factors in calibration of the bicycle ergometer, Journal of Physiology, 19(2), 5-56.

7.
Hawkins, D. & Hull, M. L.(1990). A method for determining lower extremity muscle-tendon lengths during flexion/extension movements, Journal of Biomechanics, 24(2), 217-225.

8.
Heil, D. P., Derrick, T. R., Whitlesey, S.(1997). The relationship between preferred and optimal positioning during submaximal cycle ergometry, European Journal of Applied Physiology & Occupational Physiology, 75(2), 160-165. crossref(new window)

9.
Holmes, J., Pruitt, A. L. & Whalen, N. J.(1994). Lower extremity overuse in bicycling, Clinics in Sports Medicine, 13(1), 187-205.

10.
Hug, F. & Dorel, S.(2009). Electromyographic analysis of pedaling: A review, Journal of Electromyography and Kinesiology. 19(2), 182-198. crossref(new window)

11.
Jacobs, R., Bobbert, M. F., & van Ingen Schenau, G. J.(1993). Function of mono- and biarticular muscles in running. Medicine and Science in Sports and Exercise, 25(10), 1163-1173.

12.
Peveler, W. W., Green, J. M.(2011). Effects of saddle height on economy and anaerobic power in well-trained cyclists, Journal of Strength and Conditioning Research, 25(3), 629-633. crossref(new window)

13.
Pruitt, A. L. & Matheny, F.(2006). Andy Pruitt's Complete Medical Guide for Cyclists. Boulder, Colorado, USA: Velopress.

14.
Raasch, C. C., Zajac, F. E., Ma, B., Levine, W. S.(1997). Muscle coordination of maximum-speed pedaling. Journal of Biomechanics. 30(6), 595-602. crossref(new window)

15.
Sanderson, D. J. & Amoroso, A. T.(2009). The influence of seat height on the mechanical function of the triceps surae muscles during steady-rate cycling, Journal of Electromyography and Kinesiology. 19(6), e45-e471.

16.
Sanderson, D. J., Martin, P. E., Honeyman, G. & Keefer, J.(2006). Gastrocnemius and soleus muscle length, velocity, and EMG responses to changes in pedalling cadence, Journal of Electromyography and Kinesiology. 16(6), 642-649. crossref(new window)

17.
Seo, J. W., Choi, J. S., Kang, D. W., Bae, J. H., Tack, G. R.(2012). Relationship between lower-limb joint angle and muscle activity due to saddle height during cycle pedaling, Korean Journal of Sports Biomechanics. 22(3), 357-363. crossref(new window)

18.
So, R. C. H., Ng, J. K. -F, Ng, G. T. F.(2005). Muscle recruitment pattern in cycling: a review, Physical Theraphy in Sport, 6(2), 89-96. crossref(new window)