Effects of Corrective Training on Drop Landing Ground Reaction Force Characteristics and Lower Limb Kinematics in Older Adults With Genu Valgus: A Randomized Controlled Trial

in Journal of Aging and Physical Activity
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The aim of this study was to identify the effects of a corrective exercise program on landing ground reaction force characteristics and lower limb kinematics in older adults with genu valgus. A total of 26 older male adults with genu valgus were randomized into two groups. An experimental group conducted a 14-week corrective exercise program, whereas a control group did not perform any exercise. The experimental group displayed lower peak vertical, peak anterior and posterior, and peak medial ground reaction force components during the posttest compared with the pretest. The vertical loading rate, impulses, and free moment amplitudes were not statistically different between groups. In the experimental group, the peak knee abduction during the posttest was significantly smaller and the peak hip flexion angle was significantly greater than during the pretest. The authors suggest that this corrective exercise program may be a suitable intervention to improve landing ground reaction forces and lower limb kinematics in older male adults with genu valgus.

Jafarnezhadgero and Madadi-Shad are with the Dept. of Physical Education and Sport Sciences, Faculty of Education Sciences and Psychology, University of Mohaghegh Ardabili, Ardabil, Iran. McCrum is with the Dept. of Human Movement Science, NUTRIM School of Nutrition and Translational Research in Metabolism, Maastricht University Medical Centre, Maastricht, The Netherlands; and the Institute of Movement and Sport Gerontology, German Sport University Cologne, Cologne, Germany. Karamanidis is with Sport and Exercise Science Research Centre, School of Applied Sciences, London South Bank University, London, United Kingdom.

Address author correspondence to AmirAli Jafarnezhadgero at amiralijafarnezhad@gmail.com.
  • Aboodarda, S.J., Page, P.A., & Behm, D.G. (2016). Muscle activation comparisons between elastic and isoinertial resistance: A meta-analysis. Clinical Biomechanics, 39, 5261. PubMed ID: 27681867 doi:10.1016/j.clinbiomech.2016.09.008

    • Crossref
    • Search Google Scholar
    • Export Citation
  • Ali, N., Robertson, D.G.E., & Rouhi, G. (2014). Sagittal plane body kinematics and kinetics during single-leg landing from increasing vertical heights and horizontal distances: Implications for risk of non-contact ACL injury. The Knee, 21(1), 3846. PubMed ID: 23274067 doi:10.1016/j.knee.2012.12.003

    • Crossref
    • Search Google Scholar
    • Export Citation
  • Almeida, G.P., Silva, A.P., França, F.J., Magalhães, M.O., Burke, T.N., & Marques, A.P. (2016). Q-Angle in patellofemoral pain: relationship with dynamic knee valgus, hip abductor torque, pain and function. Revista Brasileira de Ortopedia (English Edition), 51(2), 181186. doi:10.1016/j.rboe.2016.01.010

    • Crossref
    • Search Google Scholar
    • Export Citation
  • Almosnino, S., Kajaks, T., & Costigan, P.A. (2009). The free moment in walking and its change with foot rotation angle. Sports Medicine, Arthroscopy, Rehabilitation, Therapy & Technology, 1(1), 19. doi:10.1186/1758-2555-1-19

    • Search Google Scholar
    • Export Citation
  • Andersen, L.L., Andersen, C.H., Mortensen, O.S., Poulsen, O.M., Bjørnlund, I.B.T., & Zebis, M.K. (2010). Muscle activation and perceived loading during rehabilitation exercises: Comparison of dumbbells and elastic resistance. Physical Therapy, 90(4), 538549. PubMed ID: 20133444 doi:10.2522/ptj.20090167

    • Crossref
    • Search Google Scholar
    • Export Citation
  • Barrios, J.A., Heitkamp, C.A., Smith, B.P., Sturgeon, M.M., Suckow, D.W., & Sutton, C.R. (2016). Three-dimensional hip and knee kinematics during walking, running, and single-limb drop landing in females with and without genu valgum. Clinical Biomechanics, 31, 711. PubMed ID: 26515886 doi:10.1016/j.clinbiomech.2015.10.008

    • Crossref
    • Search Google Scholar
    • Export Citation
  • Barrios, J.A., Higginson, J.S., Royer, T.D., & Davis, I.S. (2009). Static and dynamic correlates of the knee adduction moment in healthy knees ranging from normal to varus-aligned. Clinical Biomechanics, 24(10), 850854. PubMed ID: 19703728 doi:10.1016/j.clinbiomech.2009.07.016

    • Crossref
    • Search Google Scholar
    • Export Citation
  • Bates, N.A., Nesbitt, R.J., Shearn, J.T., Myer, G.D., & Hewett, T.E. (2016). Sex-based differences in knee ligament biomechanics during robotically simulated athletic tasks. Journal of Biomechanics, 49(9), 14291436.

    • Crossref
    • Search Google Scholar
    • Export Citation
  • Besier, T.F., Sturnieks, D.L., Alderson, J.A., & Lloyd, D.G. (2003). Repeatability of gait data using a functional hip joint centre and a mean helical knee axis. Journal of Biomechanics, 36(8), 11591168. PubMed ID: 12831742 doi:10.1016/S0021-9290(03)00087-3

    • Crossref
    • Search Google Scholar
    • Export Citation
  • Blackburn, J.T., & Padua, D.A. (2008). Influence of trunk flexion on hip and knee joint kinematics during a controlled drop landing. Clinical Biomechanics, 23(3), 313319. PubMed ID: 18037546 doi:10.1016/j.clinbiomech.2007.10.003

    • Crossref
    • Search Google Scholar
    • Export Citation
  • Brandt, M., Jakobsen, M.D., Thorborg, K., Sundstrup, E., Jay, K., & Andersen, L.L. (2013). Perceived loading and muscle activity during hip strengthening exercises: Comparison of elastic resistance and machine exercises. International Journal of Sports Physical Therapy, 8(6), 811. PubMed ID: 24377067

    • Search Google Scholar
    • Export Citation
  • Brown, T., O’Donovan, M., Hasselquist, L., Corner, B., & Schiffman, J.M. (2016). Lower limb flexion posture relates to energy absorption during drop landings with soldier-relevant body borne loads. Applied Ergonomics, 52, 5461. PubMed ID: 26360194 doi:10.1016/j.apergo.2015.06.004

    • Crossref
    • Search Google Scholar
    • Export Citation
  • Bruening, D.A., Frimenko, R.E., Goodyear, C.D., Bowden, D.R., & Fullenkamp, A.M. (2015). Sex differences in whole body gait kinematics at preferred speeds. Gait and Posture, 41(2), 540545.

    • Crossref
    • Search Google Scholar
    • Export Citation
  • Butler, R.J., Barrios, J.A., Royer, T., & Davis, I.S. (2011). Frontal-plane gait mechanics in people with medial knee osteoarthritis are different from those in people with lateral knee osteoarthritis. Physical Therapy, 91(8), 12351243. doi:10.2522/ptj.20100324

    • Crossref
    • Search Google Scholar
    • Export Citation
  • Carcia, C.R., Kivlan, B.R., & Scibek, J.S. (2012). Time to peak force is related to frontal plane landing kinematics in female athletes. Physical Therapy in Sport, 13(2), 7379. PubMed ID: 22498147 doi:10.1016/j.ptsp.2011.06.003

    • Crossref
    • Search Google Scholar
    • Export Citation
  • Chappell, J.D., Creighton, R.A., Giuliani, C., Yu, B., & Garrett, W.E. (2007). Kinematics and electromyography of landing preparation in vertical stop-jump risks for noncontact anterior cruciate ligament injury. The American Journal of Sports Medicine, 35(2), 235241. PubMed ID: 17092926 doi:10.1177/0363546506294077

    • Crossref
    • Search Google Scholar
    • Export Citation
  • Chappell, J.D., Yu, B., Kirkendall, D.T., & Garrett, W.E. (2002). A comparison of knee kinetics between male and female recreational athletes in stop-jump tasks. The American Journal of Sports Medicine, 30(2), 261267. PubMed ID: 11912098. doi:10.1177/03635465020300021901

    • Crossref
    • Search Google Scholar
    • Export Citation
  • Clark, M., & Lucett, S. (2010). NASM essentials of corrective exercise training. Philadelphia: Jones & Bartlett Learning.

  • Clarkson, P.M., & Hubal, M.J. (2002). Exercise-induced muscle damage in humans. American Journal of Physical Medicine & Rehabilitation, 81(11), 5269. doi:10.1097/00002060-200211001-00007

    • Crossref
    • Search Google Scholar
    • Export Citation
  • Dai, B., Heinbaugh, E.M., Ning, X., & Zhu, Q. (2014). A resistance band increased internal hip abduction moments and gluteus medius activation during pre-landing and early-landing. Journal of Biomechanics, 47(15), 36743680. doi:10.1016/j.jbiomech.2014.09.032

    • Crossref
    • Search Google Scholar
    • Export Citation
  • DeMorat, G., Weinhold, P., Blackburn, T., Chudik, S., & Garrett, W. (2004). Aggressive quadriceps loading can induce noncontact anterior cruciate ligament injury. The American Journal of Sports Medicine, 32(2), 477483. PubMed ID: 14977677 doi:10.1177/0363546503258928

    • Crossref
    • Search Google Scholar
    • Export Citation
  • Devita, P., & Skelly, W.A. (1992). Effect of landing stiffness on joint kinetics and energetics in the lower extremity. Medicine Science Sports & Exercise, 24(1), 108115.

    • Crossref
    • Search Google Scholar
    • Export Citation
  • Farley, C.T., Blickhan, R., Saito, J., & Taylor, C.R. (1991). Hopping frequency in humans: A test of how springs set stride frequency in bouncing gaits. Journal of Applied Physiology, 71(6), 21272132. PubMed ID: 1778902 doi:10.1152/jappl.1991.71.6.2127

    • Crossref
    • Search Google Scholar
    • Export Citation
  • Faul, F., Erdfelder, E., Lang, A.-G., & Buchner, A. (2007). G* Power 3: A flexible statistical power analysis program for the social, behavioral, and biomedical sciences. Behavior Research Methods, 39(2), 175191. PubMed ID: 17695343 doi:10.3758/BF03193146

    • Crossref
    • Search Google Scholar
    • Export Citation
  • Franzke, B., Halper, B., Hofmann, M., Oesen, S., Pierson, B., Cremer, A., . . . Tosevska, A. (2015). The effect of six months of elastic band resistance training, nutritional supplementation or cognitive training on chromosomal damage in institutionalized elderly. Experimental Gerontology, 65, 1622. PubMed ID: 25747997 doi:10.1016/j.exger.2015.03.001

    • Crossref
    • Search Google Scholar
    • Export Citation
  • Hargrave, M.D., Carcia, C.R., Gansneder, B.M., & Shultz, S.J. (2003). Subtalar pronation does not influence impact forces or rate of loading during a single-leg landing. Journal of Athletic Training, 38(1), 18. PubMed ID: 12937467

    • Search Google Scholar
    • Export Citation
  • Hayashi, D., Englund, M., Roemer, F.W., Niu, J., Sharma, L., Felson, D.T., . . . Lewis, C.E. (2012). Knee malalignment is associated with an increased risk for incident and enlarging bone marrow lesions in the more loaded compartments: The MOST study. Osteoarthritis and Cartilage, 20(11), 12271233. PubMed ID: 22874524 doi:10.1016/j.joca.2012.07.020

    • Crossref
    • Search Google Scholar
    • Export Citation
  • Hewett, T.E., Myer, G.D., Ford, K.R., Heidt, R.S., Colosimo, A.J., McLean, S.G., . . . Succop, P. (2005). Biomechanical measures of neuromuscular control and valgus loading of the knee predict anterior cruciate ligament injury risk in female athletes a prospective study. The American Journal of Sports Medicine, 33(4), 492501. PubMed ID: 15722287 doi:10.1177/0363546504269591

    • Crossref
    • Search Google Scholar
    • Export Citation
  • Hostler, D., Schwirian, C.I., Campos, G., Toma, K., Crill, M.T., Hagerman, G.R., . . . Staron, R.S. (2001). Skeletal muscle adaptations in elastic resistance-trained young men and women. European Journal of Applied Physiology, 86(2), 112118. PubMed ID: 11822469 doi:10.1007/s004210100495

    • Crossref
    • Search Google Scholar
    • Export Citation
  • Iida, Y., Kanehisa, H., Inaba, Y., & Nakazawa, K. (2011). Activity modulations of trunk and lower limb muscles during impact-absorbing landing. Journal of Electromyography and Kinesiology, 21(4), 602609. PubMed ID: 21549617 doi:10.1016/j.jelekin.2011.04.001

    • Crossref
    • Search Google Scholar
    • Export Citation
  • Ishida, T., Yamanaka, M., Takeda, N., & Aoki, Y. (2014). Knee rotation associated with dynamic knee valgus and toe direction. The Knee, 21(2), 563566. PubMed ID: 23290175 doi:10.1016/j.knee.2012.12.002

    • Crossref
    • Search Google Scholar
    • Export Citation
  • Jafarnezhadgero, A.A., Shad, M.M., & Majlesi, M. (2017). Effect of foot orthoses on the medial longitudinal arch in children with flexible flatfoot deformity: A three-dimensional moment analysis. Gait & Posture, 55, 7580. PubMed ID: 28419877 doi:10.1016/j.gaitpost.2017.04.011

    • Crossref
    • Search Google Scholar
    • Export Citation
  • Jakobsen, M.D., Sundstrup, E., Andersen, C.H., Bandholm, T., Thorborg, K., Zebis, M.K., & Andersen, L.L. (2012). Muscle activity during knee-extension strengthening exercise performed with elastic tubing and isotonic resistance. International Journal of Sports Physical Therapy, 7(6), 606

    • Search Google Scholar
    • Export Citation
  • Jenkins, W.L., Williams, D.B., Williams, K., Hefner, J., & Welch, H. (2017). Sex differences in total frontal plane knee movement and velocity during a functional single-leg landing. Physical Therapy in Sport, 24, 16.

    • Crossref
    • Search Google Scholar
    • Export Citation
  • Kagaya, Y., Fujii, Y., & Nishizono, H. (2015). Association between hip abductor function, rear-foot dynamic alignment, and dynamic knee valgus during single-leg squats and drop landings. Journal of Sport and Health Science, 4(2), 182187. doi:10.1016/j.jshs.2013.08.002

    • Crossref
    • Search Google Scholar
    • Export Citation
  • Kamonseki, D.H., Gonçalves, G.A., Liu, C.Y., & Júnior, I.L. (2016). Effect of stretching with and without muscle strengthening exercises for the foot and hip in patients with plantar fasciitis: A randomized controlled single-blind clinical trial. Manual Therapy, 23, 7682.

    • Crossref
    • Search Google Scholar
    • Export Citation
  • Kean, C.O., Hinman, R.S., Wrigley, T.V., Lim, B.-W., & Bennell, K.L. (2017). Impact loading following quadriceps strength training in individuals with medial knee osteoarthritis and varus alignment. Clinical Biomechanics, 42, 2024. PubMed ID: 28068520 doi:10.1016/j.clinbiomech.2017.01.002

    • Crossref
    • Search Google Scholar
    • Export Citation
  • Lagally, K.M., & Robertson, R.J. (2006). Construct validity of the OMNI resistance exercise scale. The Journal of Strength & Conditioning Research, 20(2), 252256. PubMed ID: 16686549

    • Search Google Scholar
    • Export Citation
  • Lerner, Z.F., DeMers, M.S., Delp, S.L., & Browning, R.C. (2015). How tibiofemoral alignment and contact locations affect predictions of medial and lateral tibiofemoral contact forces. Journal of Biomechanics, 48(4), 644650. doi:10.1016/j.jbiomech.2014.12.049

    • Crossref
    • Search Google Scholar
    • Export Citation
  • Li, Y., Wang, W., Crompton, R.H., & Gunther, M.M. (2001). Free vertical moments and transverse forces in human walking and their role in relation to arm-swing. Journal of Experimental Biology, 204(1), 4758

    • Search Google Scholar
    • Export Citation
  • Magee, D.J. (2014). Orthopedic physical assessment. Alberta, Canada: Elsevier Health Sciences.

  • Milner, C.E., Davis, I.S., & Hamill, J. (2006). Free moment as a predictor of tibial stress fracture in distance runners. Journal of Biomechanics, 39(15), 28192825. PubMed ID: 16289078 doi:10.1016/j.jbiomech.2005.09.022

    • Crossref
    • Search Google Scholar
    • Export Citation
  • Munro, C.F., Miller, D.I., & Fuglevand, A.J. (1987). Ground reaction forces in running: A reexamination. Journal of Biomechanics, 20(2), 147155. PubMed ID: 3571295 doi:10.1016/0021-9290(87)90306-X

    • Crossref
    • Search Google Scholar
    • Export Citation
  • Myer, G.D., Ford, K.R., Di Stasi, S.L., Foss, K.D.B., Micheli, L.J., & Hewett, T.E. (2015). High knee abduction moments are common risk factors for patellofemoral pain (PFP) and anterior cruciate ligament (ACL) injury in girls: Is PFP itself a predictor for subsequent ACL injury? British Journal of Sports Medicine, 49(2), 118122. PubMed ID: 24687011 doi:10.1136/bjsports-2013-092536

    • Crossref
    • Search Google Scholar
    • Export Citation
  • Niu, W., Wang, Y., He, Y., Fan, Y., & Zhao, Q. (2011). Kinematics, kinetics, and electromyogram of ankle during drop landing: A comparison between dominant and non-dominant limb. Human Movement Science, 30(3), 614623. PubMed ID: 21439665 doi:10.1016/j.humov.2010.10.010

    • Crossref
    • Search Google Scholar
    • Export Citation
  • Nyland, J., & Caborn, D. (2004). Physiological coxa varus–genu valgus influences internal knee and ankle joint moments in females during crossover cutting. Knee Surgery, Sports Traumatology, Arthroscopy, 12(4), 285293. PubMed ID: 14618320 doi:10.1007/s00167-003-0430-3

    • Crossref
    • Search Google Scholar
    • Export Citation
  • Page, P., & Ellenbecker, T. (2005). Strength band training. USA: Human Kinetics.

  • Patterson, R.M., Jansen, C.W.S., Hogan, H.A., & Nassif, M.D. (2001). Material properties of thera-band tubing. Physical Therapy, 81(8), 14371445. PubMed ID: 11509073 doi:10.1093/ptj/81.8.1437

    • Crossref
    • Search Google Scholar
    • Export Citation
  • Podraza, J.T., & White, S.C. (2010). Effect of knee flexion angle on ground reaction forces, knee moments and muscle co-contraction during an impact-like deceleration landing: Implications for the non-contact mechanism of ACL injury. The Knee, 17(4), 291295. PubMed ID: 20303276 doi:10.1016/j.knee.2010.02.013

    • Crossref
    • Search Google Scholar
    • Export Citation
  • Pollard, C.D., Sigward, S.M., & Powers, C.M. (2010). Limited hip and knee flexion during landing is associated with increased frontal plane knee motion and moments. Clinical Biomechanics, 25(2), 142146. PubMed ID: 19913961 doi:10.1016/j.clinbiomech.2009.10.005

    • Crossref
    • Search Google Scholar
    • Export Citation
  • Pollock, M.L., Gaesser, G.A., Butcher, J.D., Després, J.-P., Dishman, R.K., Franklin, B.A., & Garber, C.E. (1998). ACSM position stand. Medicine & Science in Sports & Exercise, 30(6), 975991.

    • Search Google Scholar
    • Export Citation
  • Powers, C.M. (2003). The influence of altered lower-extremity kinematics on patellofemoral joint dysfunction: A theoretical perspective. Journal of Orthopaedic & Sports Physical Therapy, 33(11), 639646. PubMed ID: 14669959 doi:10.2519/jospt.2003.33.11.639

    • Crossref
    • Search Google Scholar
    • Export Citation
  • Powers, C.M. (2010). The influence of abnormal hip mechanics on knee injury: A biomechanical perspective. Journal of Orthopaedic & Sports Physical Therapy, 40(2), 4251. PubMed ID: 20118526 doi:10.2519/jospt.2010.3337

    • Crossref
    • Search Google Scholar
    • Export Citation
  • Raynor, A.J., Yi, C.J., Abernethy, B., & Jong, Q.J. (2002). Are transitions in human gait determined by mechanical, kinetic or energetic factors? Human Movement Science, 21(5), 785805. doi:10.1016/S0167-9457(02)00180-X

    • Crossref
    • Search Google Scholar
    • Export Citation
  • Rejeski, W.J., Ip, E.H., Marsh, A.P., Miller, M.E., & Farmer, D.F. (2008). Measuring disability in older adults: The International Classification System of Functioning, Disability and Health (ICF) framework. Geriatrics & Gerontology International, 8(1), 4854. PubMed ID: 18713189 doi:10.1111/j.1447-0594.2008.00446.x

    • Crossref
    • Search Google Scholar
    • Export Citation
  • Robertson, G., Caldwell, G., Hamill, J., Kamen, G., & Whittlesey, S. (2013). Research methods in biomechanics (2nd ed.). USA: Human Kinetics.

    • Search Google Scholar
    • Export Citation
  • Shaw, T., Williams, M.T., & Chipchase, L.S. (2005). Do early quadriceps exercises affect the outcome of ACL reconstruction? A randomised controlled trial. Australian Journal of Physiotherapy, 51(1), 917. PubMed ID: 15748120 doi:10.1016/S0004-9514(05)70048-9

    • Crossref
    • Search Google Scholar
    • Export Citation
  • Sundstrup, E., Jakobsen, M., Andersen, C., Bandholm, T., Thorborg, K., Zebis, M., & Andersen, L. (2014). Evaluation of elastic bands for lower extremity resistance training in adults with and without musculo‐skeletal pain. Scandinavian Journal of Medicine & Science in Sports, 24(5), e353e359. PubMed ID: 25138624 doi:10.1111/sms.12187

    • Crossref
    • Search Google Scholar
    • Export Citation
  • Teichtahl, A., Wluka, A., & Cicuttini, F. (2008). Frontal plane knee alignment is associated with a longitudinal reduction in patella cartilage volume in people with knee osteoarthritis. Osteoarthritis and Cartilage, 16(7), 851854. PubMed ID: 18194873 doi:10.1016/j.joca.2007.12.002

    • Crossref
    • Search Google Scholar
    • Export Citation
  • Turban, C., Culas, C., & Deley, G. (2014). Effects of a short-term resistance program using elastic bands or weight machines in cardiac rehabilitation. Science & Sports, 29(3), 143149. doi:10.1016/j.scispo.2013.07.005

    • Crossref
    • Search Google Scholar
    • Export Citation
  • Umberger, B.R. (2008). Effects of suppressing arm swing on kinematics, kinetics, and energetics of human walking. Journal of Biomechanics, 41(11), 25752580. PubMed ID: 18621376 doi:10.1016/j.jbiomech.2008.05.024

    • Crossref
    • Search Google Scholar
    • Export Citation
  • Vanwanseele, B., Parker, D., & Coolican, M. (2009). Frontal knee alignment: three-dimensional marker positions and clinical assessment. Clinical Orthopaedics and Related Research, 467(2), 504509. PubMed ID: 18841432 doi:10.1007/s11999-008-0545-4

    • Crossref
    • Search Google Scholar
    • Export Citation
  • Weidenhielm, L., Svensson, O., & Broström, L.-Å. (1995). Surgical correction of leg alignment in unilateral knee osteoarthrosis reduces the load on the hip and knee joint bilaterally. Clinical Biomechanics, 10(4), 217221. PubMed ID: 11415556 doi:10.1016/0268-0033(95)91401-Y

    • Crossref
    • Search Google Scholar
    • Export Citation
  • Weidow, J., Tranberg, R., Saari, T., & Kärrholm, J. (2006). Hip and knee joint rotations differ between patients with medial and lateral knee osteoarthritis: Gait analysis of 30 patients and 15 controls. Journal of Orthopaedic Research, 24(9), 18901899. PubMed ID: 16838360 doi:10.1002/jor.20194

    • Crossref
    • Search Google Scholar
    • Export Citation
  • Yeow, C., Lee, P., & Goh, J. (2010). Sagittal knee joint kinematics and energetics in response to different landing heights and techniques. The Knee, 17(2), 127131. PubMed ID: 19720537 doi:10.1016/j.knee.2009.07.015

    • Crossref
    • Search Google Scholar
    • Export Citation
  • Yu, B., & Garrett, W.E. (2007). Mechanisms of non-contact ACL injuries. British Journal of Sports Medicine, 41(Suppl. 1), i47i51.

  • Yu, B., Lin, C.-F., & Garrett, W.E. (2006). Lower extremity biomechanics during the landing of a stop-jump task. Clinical Biomechanics, 21(3), 297305. PubMed ID: 16378667 doi:10.1016/j.clinbiomech.2005.11.003

    • Crossref
    • Search Google Scholar
    • Export Citation
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