Thigh Muscle Activities in Elite Rowers During On-Water Rowing

Abstract

This study analysed the muscle activity levels and patterns of the major thigh muscle activation during training sections at different intensities of on-water rowing. 9 experienced rowers performed 2 imposed-pace sections (B1 and B2) and 2 maximal-speed sections (start, 500 m) of on-water rowing. The knee angle, power output, mean torque and stroke rate were measured using specific instrumentation and were synchronised with surface electromyography signals of 5 superficial quadriceps and hamstring muscles. B1 and B2 sections were not significantly different regarding mechanical parameters and EMG activities, while the start phase induced large differences. The EMG patterns for B1, B2 were similar (cross-correlation coefficients (CC) ranged between 0.972–0.984) and the moderate CC found between both B1 and start (0.605–0.720) and B2 and start (0.629–0.720). Our results suggest that the hamstring muscles have a motor action and contribute to the power production during the leg drive. During an all-out 500 m section, a decrease in power and stroke rate was found (up to 20%). However, EMG patterns were not time shifted for all muscles. During the leg drive, the muscle activity levels of the quadriceps muscles were unchanged, while the activity of the hamstring muscles decreased.

Key words

surface electromyography - muscular activation pattern - quadriceps - hamstring

References

• 1 Baudouin A, Hawkins D. Investigation of biomechanical factors affecting rowing performance.  J Biomech. 2004;  37 969-976
• 2 Burden A, Bartlett R. Normalisation of EMG amplitude: an evaluation and comparison of old and new methods.  Med Eng Phys. 1999;  21 247-257
• 3 Colloud F, Bahuaud P, Doriot N, Champely S, Cheze L. Fixed versus free-floating stretcher mechanism in rowing ergometers: mechanical aspects.  J Sports Sci. 2006;  24 479-493
• 4 De Luca CJ. The Use of surface electromyography in biomechanics.  J Appl Biomech. 1997;  13 135-163
• 5 Dorel S, Drouet JM, Couturier A, Champoux Y, Hug F. Changes of pedalling technique and muscle coordination during an exhaustive exercise.  Med Sci Sports Exerc. 2009;  41 1277-1286
• 6 Dorel S, Couturier A, Hug F. Intra-session repeatability of lower limb muscles activiation pattern during pedalling.  J Electromyogr Kines. 2008;  18 857-865
• 7 Fortin YD, Robertson DGE. Lower extremity muscle function during ergometer rowing. In: Canadian Society for Biomechanics VIII Calgary, Canada; 1994
• 8 Garland SW. An analysis of the pacing strategy adopted by elite competitors in 2 000 m rowing.  Br J Sports Med. 2005;  39 39-42
• 9 Hagerman FC. Applied physiology of rowing.  Sports Med. 1984;  1 303-326
• 10 Hagerman FC, Staron RS. Seasonal variables among physiological variables in elite oarsmen.  Can J Appl Sport Sci. 1983;  8 143-148
• 11 Harriss DJ, Atkinson G. International Journal of Sports Medicine – Ethical Standards in Sport and Exercise Science Research.  Int J Sports Med. 2009;  30 701-702
• 12 Hermens HJ, Freriks B, Disselhorst-Klug C, Rau G. Development of recommendations for SEMG sensors and sensor placement procedures.  J Electromyogr Kinesiol. 2000;  10 361-374
• 13 Hug F, Dorel S. Electromyographic analysis of pedaling: a review.  J Electromyogr Kinesiol. 2009;  19 182-198
• 14 Janshen L, Mattes K, Tidow G. Muscular coordination of the lower extremities of oarsmen during ergometer rowing.  J Appl Biomech. 2009;  25 156-164
• 15 Kleshnev V. Comparison of on-water rowing with its simulation on Concept2 and Rowperfect machines. Scientific proceedings. XXII International Symposium on Biomechanics in Sports, Beijing, China; 2005: 130-133
• 16 Kyrölaïnen H, Smith R. Mechanical power output and muscle activities during maximal rowing with different stroke rate.  J Hum Mov Stud. 1999;  36 75-94
• 17 Lacour JR, Messonnier L, Bourdin M. The leveling-off of oxygen uptake is related to blood lactate accumulation Retrospective study of 94 elite rowers.  Eur J Appl Physiol. 2007;  101 241-247
• 18 Lamb DH. A kinematic comparison of ergometer and on-water rowing.  Am J Sports Med. 1989;  17 367-373
• 19 Legnani G, Zappa B, Casolo F, Adamini R, Magnani PL. A model of an electro-goniometer and its calibration for biomechanical applications.  Med Eng Phys. 2000;  22 711-722
• 20 Lombard WP. The action of 2-joint muscles.  Am Physiol Educ Rev. 1903;  8 141-145
• 21 Macfarlane DJ, Edmond IM, Walmsley A. Instrumentation of an ergometer to monitor the reliability of rowing performance.  J Sports Sci. 1997;  15 167-173
• 22 Nolte LV .Rowing faster. Champaign, IL: Human Kinetics; 2005
• 23 Nowicky AV, Burdett R, Horne S. The impact of ergometer design on hip and trunk muscle activity patterns in elite rowers: an electromyographic assessment.  J Sports Sci Med. 2005;  4 18-28
• 24 Parkin S, Nowicky AV, Rutherford OM, McGregor AH. Do oarsmen have asymmetries in the strength of their back and leg muscles?.  J Sports Sci. 2001;  19 521-526
• 25 Rodriguez RJ, Rogriguez RP, Cook SD, Sandborn PM. Electromyographic analysis of rowing stroke biomechanics.  J Sports Med Phys Fitness. 1990;  30 103-108
• 26 Secher NH. Physiological and biomechanical aspects of rowing. Implications for training.  Sports Med. 1993;  15 24-42
• 27 Secher NH, Vaage O. Rowing performance, a mathematical model based on analysis of body dimensions as exemplified by body weight.  Eur J Appl Physiol. 1983;  52 88-93
• 28 Slawinski J, Dorel S, Hug F, Couturier A, Fournel V, Morin JB, Hanon C. Elite long sprint running: a comparison between incline and level training sessions.  Med Sci Sports Exerc. 2008;  40 1155-1162
• 29 Soper C, Hume PA. Towards an ideal rowing technique for performance: the contributions from biomechanics.  Sports Med. 2004;  34 825-848
• 30 Steinacker JM. Physiological aspects of training in rowing.  Int J Sports Med. 1993;  14 (S 01) S3-S10
• 31 Wilson JMJ, Robertson DG, Stothart JP. Analysis of lower limb muscle function in ergometer rowing.  Int J Sport Biomech. 1988;  4 315-325
• 32 Wren TA, Do KP, Rethlefsen SA, Healy B. Cross-correlation as a method for comparing dynamic electromyography signals during gait.  J Biomech. 2006;  39 2714-2718
• 33 Zajac FE. Understanding muscle coordination of the human leg with dynamical simulations.  J Biomech. 2002;  35 1011-1018

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