The effect of age and joint angle on the proportionality of extensor and flexor strength at the knee joint.

Functional movements require concerted actions of monoarticular and biarticular agonists and antagonists. Understanding age-related changes of muscle function on performance requires insight in the contributions of different muscles to joint moments. Young and elderly participants performed isometric knee extensions and flexions at combinations of knee and hip joint angles. This approach allowed assessing changes in contribution of monoarticular and biarticular knee joint flexors and extensors. Reduced moments were found for elderly persons (flexors: -43%; extensors: -33%). In the flexor group, this reduction was mainly caused by retardation of the biarticular muscles; in the extensors, by reduced strength of the monoarticular muscles. This age-related reduction of joint moments occurred to be joint angle dependent for the extensors. In the flexor group, the reduction was almost invariant. Due to this difference in joint angle dependence, the proportionality between extensors and flexors varied over joint angles and differed with age. It has been discussed how this is related to changes in performances occurring with age.

[1]  J. Fleg,et al.  Muscle quality. I. Age-associated differences between arm and leg muscle groups. , 1999, Journal of applied physiology.

[2]  E B Simonsen,et al.  A New Concept For Isokinetic Hamstring: Quadriceps Muscle Strength Ratio , 1998, The American journal of sports medicine.

[3]  Chris A McGibbon,et al.  Discriminating age and disability effects in locomotion: neuromuscular adaptations in musculoskeletal pathology. , 2004, Journal of applied physiology.

[4]  J. Collins,et al.  Biomechanical gait alterations independent of speed in the healthy elderly: evidence for specific limiting impairments. , 1998, Archives of physical medicine and rehabilitation.

[5]  S. Binder-Macleod,et al.  Characterization of the human quadriceps muscle in active elders. , 2001, Archives of physical medicine and rehabilitation.

[6]  M. Horvat,et al.  Peak torque, average power, and hamstrings/quadriceps ratios in nondisabled adults and adults with mental retardation. , 1996, Archives of physical medicine and rehabilitation.

[7]  G. Hunter,et al.  The Effects of Strength Conditioning on Older Women's Ability to Perform Daily Tasks , 1995, Journal of the American Geriatrics Society.

[8]  Susan Hughes,et al.  Predictors of Change in Walking Velocity in Older Adults , 1996, Journal of the American Geriatrics Society.

[9]  W. Herzog,et al.  Moment-length relations of rectus femoris muscles of speed skaters/cyclists and runners. , 1991, Medicine and science in sports and exercise.

[10]  H. Savelberg,et al.  Contribution of mono- and biarticular muscles to extending knee joint moments in runners and cyclists. , 2003, Journal of applied physiology.

[11]  E H Wagner,et al.  Factors associated with changes in gait speed in older adults. , 1996, The journals of gerontology. Series A, Biological sciences and medical sciences.

[12]  J. Harlaar,et al.  Two strategies of transferring from sit-to-stand; the activation of monoarticular and biarticular muscles. , 1994, Journal of biomechanics.

[13]  D. Krebs,et al.  Lifting characteristics of functionally limited elders. , 2000, Journal of rehabilitation research and development.

[14]  B S Myers,et al.  The role of strength in rising from a chair in the functionally impaired elderly. , 1996, Journal of biomechanics.

[15]  P O Riley,et al.  Effect of age on lower extremity joint moment contributions to gait speed. , 2001, Gait & posture.

[16]  S. Õunpuu,et al.  Step length reductions in advanced age: the role of ankle and hip kinetics. , 1996, The journals of gerontology. Series A, Biological sciences and medical sciences.

[17]  A. Macaluso,et al.  Contractile muscle volume and agonist‐antagonist coactivation account for differences in torque between young and older women , 2002, Muscle & nerve.

[18]  J. Burnfield,et al.  The influence of lower extremity joint torque on gait characteristics in elderly men. , 2000, Archives of physical medicine and rehabilitation.

[19]  T. Oberg,et al.  Basic gait parameters: reference data for normal subjects, 10-79 years of age. , 1993, Journal of rehabilitation research and development.

[20]  E. Vamvakoudis,et al.  Peak torque of quadriceps and hamstring muscles in basketball and soccer players of different divisions. , 1995, The Journal of sports medicine and physical fitness.

[21]  D. Cunningham,et al.  Age-related changes in speed of walking. , 1988 .

[22]  T. Hortobágyi,et al.  Age causes a redistribution of joint torques and powers during gait. , 2000, Journal of applied physiology.

[23]  S. Harridge,et al.  Knee extensor strength, activation, and size in very elderly people following strength training , 1999, Muscle & nerve.

[24]  B. Fernhall,et al.  Comparison of isokinetic peak force and work parameters in youth with and without mental retardation. , 1999, Medicine and science in sports and exercise.

[25]  S. Hunter,et al.  Relationships among age-associated strength changes and physical activity level, limb dominance, and muscle group in women. , 2000, The journals of gerontology. Series A, Biological sciences and medical sciences.

[26]  Eccentric and concentric isokinetic moment characteristics in the quadriceps and hamstrings of the chronic isolated posterior cruciate ligament injured knee. , 1999, British journal of sports medicine.

[27]  Theodore F. Towse,et al.  Effects of age on human muscle torque, velocity, and power in two muscle groups. , 2003, Journal of applied physiology.

[28]  D. Cunningham,et al.  Age-related changes in speed of walking. , 1988, Medicine and science in sports and exercise.

[29]  T. Hortobágyi,et al.  Old adults perform activities of daily living near their maximal capabilities. , 2003, The journals of gerontology. Series A, Biological sciences and medical sciences.

[30]  D. Morgan,et al.  Differences in rat skeletal muscles after incline and decline running. , 1998, Journal of applied physiology.

[31]  D. Winter,et al.  Biomechanical walking pattern changes in the fit and healthy elderly. , 1990, Physical therapy.

[32]  P O Riley,et al.  Reduced hip extension during walking: healthy elderly and fallers versus young adults. , 2001, Archives of physical medicine and rehabilitation.

[33]  M. Hull,et al.  A method for determining lower extremity muscle-tendon lengths during flexion/extension movements. , 1990, Journal of biomechanics.

[34]  W J Kraemer,et al.  Changes in agonist-antagonist EMG, muscle CSA, and force during strength training in middle-aged and older people. , 1998, Journal of applied physiology.

[35]  P Capodaglio,et al.  Strength and power changes of the human plantar flexors and knee extensors in response to resistance training in old age. , 2003, Acta physiologica Scandinavica.

[36]  M. Samson,et al.  Differences in gait parameters at a preferred walking speed in healthy subjects due to age, height and body weight , 2001, Aging.

[37]  G. Hunter,et al.  The interrelationship among muscle mass, strength, and the ability to perform physical tasks of daily living in younger and older women. , 2001, The journals of gerontology. Series A, Biological sciences and medical sciences.

[38]  G. J. van Ingen Schenau,et al.  The constrained control of force and position in multi-joint movements , 1992, Neuroscience.

[39]  M. Brown,et al.  The relationship of strength to function in the older adult. , 1995, The journals of gerontology. Series A, Biological sciences and medical sciences.

[40]  Richard W. Bohannon,et al.  Relationship between knee extension force and stand-up performance in community-dwelling elderly women. , 2001, Archives of physical medicine and rehabilitation.

[41]  M. Järvinen,et al.  Knee flexor/extensor strength ratio in follow-up of acute knee distortion injuries. , 1990, Archives of physical medicine and rehabilitation.

[42]  D E Krebs,et al.  Quadriceps muscle strength and dynamic stability in elderly persons. , 1999, Gait & posture.

[43]  P. Huijing,et al.  Heterogeneity of mean sarcomere length in different fibres: effects on length range of active force production in rat muscle , 1994, European Journal of Applied Physiology and Occupational Physiology.

[44]  T. Doherty.  Invited review: Aging and sarcopenia. , 2003, Journal of applied physiology.