Arm motion and load analysis of sit-to-stand, stand-to-sit, cane walking and lifting.

OBJECTIVE To conduct a pilot study to characterize the hand loads, arm joint angles and external moments corresponding to five activities of daily living demanding of the shoulder, for healthy subjects over 50 years of age. DESIGN The tasks were sit-to-stand, stand-to-sit, cane walking, lifting a 5 kg box with both hands, and lifting a 10 kg suitcase. BACKGROUND Arm motion and loading have not been previously studied for functional daily-living tasks involving substantial external loads.Methods. Motion was tracked using an optoelectronic system. Loads were measured using an instrumented chair arm, a force plate, and gravitational and acceleration loads. Six healthy volunteers (3 male, 3 female), mean age 55, with no history of shoulder problems participated in the study. RESULTS Average peak external moments ranged from 12.3 N m for sitting down into a chair to 27.9 N m for lifting a suitcase. Except for lifting the box, which had much lower loads, average peak hand loads varied from 16% to 19% of body weight (114-134 N). The arcs of motion were larger than for seated activities of daily-living studied previously. CONCLUSIONS The five tasks studied are commonly performed, yet involve large external moments. Lifting represents the greatest potential loading at the shoulder as it resulted in the highest external moments; furthermore, loads larger than those used in this study might be commonly lifted. RELEVANCE External moments at the shoulder should not be underestimated, even for activities of daily living.

[1]  A. Schultz,et al.  Biomechanical analyses of rising from a chair. , 1992, Journal of biomechanics.

[2]  Raymond G. Gosine,et al.  A functional task analysis and motion simulation for the development of a powered upper-limb orthosis , 1994 .

[3]  E. Chao,et al.  A biomechanical study of normal functional elbow motion. , 1981, The Journal of bone and joint surgery. American volume.

[4]  G R Johnson,et al.  Dynamics of the Upper Limb during Performance of the Tasks of Everyday Living—A Review of the Current Knowledge Base , 1996, Proceedings of the Institution of Mechanical Engineers. Part H, Journal of engineering in medicine.

[5]  H E Veeger,et al.  Quasi-static analysis of muscle forces in the shoulder mechanism during wheelchair propulsion. , 1996, Journal of biomechanics.

[6]  A. Schultz,et al.  Rising from a chair: effects of age and functional ability on performance biomechanics. , 1991, Journal of gerontology.

[7]  I Söderkvist,et al.  Determining the movements of the skeleton using well-configured markers. , 1993, Journal of biomechanics.

[8]  R A Brand,et al.  The effect of cane use on hip contact force. , 1980, Clinical orthopaedics and related research.

[9]  B. Seedhom,et al.  Forces in the knee joint whilst rising from a seated position. , 1984, Journal of biomedical engineering.

[10]  R. Burdett,et al.  Biomechanical comparison of rising from two types of chairs. , 1985, Physical therapy.

[11]  D R Pichora,et al.  Glenohumeral contact forces , 2000, Proceedings of the Institution of Mechanical Engineers. Part H, Journal of engineering in medicine.

[12]  G L Smidt,et al.  Effect of cane on variables of gait for patients with hip disorders. , 1977, Physical therapy.

[13]  R. Brumfield,et al.  A biomechanical study of normal functional wrist motion. , 1984, Clinical orthopaedics and related research.

[14]  R. John Runciman.  Biomechanical model of the shoulder joint. , 1993 .

[15]  U. Wyss,et al.  Review of arm motion analyses , 2000, Proceedings of the Institution of Mechanical Engineers. Part H, Journal of engineering in medicine.

[16]  S. Sepic,et al.  Shoulder-muscle strength and range of motion following surgical repair of full-thickness rotator-cuff tears. , 1986, The Journal of bone and joint surgery. American volume.

[17]  W. Cheney,et al.  Numerical analysis: mathematics of scientific computing (2nd ed) , 1991 .

[18]  U. Wyss,et al.  Elbow kinematics during sit-to-stand and stand-to-sit movements. , 1993, Clinical biomechanics.

[19]  D. Kirschenbaum,et al.  Shoulder strength with rotator cuff tears. Pre- and postoperative analysis. , 1993, Clinical orthopaedics and related research.

[20]  J T Bryant,et al.  Geometry of the humeroulnar joint , 1988, Journal of orthopaedic research : official publication of the Orthopaedic Research Society.

[21]  K. An,et al.  Functional ranges of motion of the wrist joint. , 1991, The Journal of hand surgery.

[22]  U. Wyss,et al.  Examining the Elbow during Functional Activities , 1990 .

[23]  J. Perry,et al.  Rising from a chair. Influence of age and chair design. , 1985, Physical therapy.

[24]  C. Sledge,et al.  Total shoulder arthroplasty versus hemiarthroplasty , 1990 .

[25]  J. Ashton-Miller,et al.  A cane reduces loss of balance in patients with peripheral neuropathy: results from a challenging unipedal balance test. , 1996, Archives of physical medicine and rehabilitation.

[26]  J. Challis.  A procedure for determining rigid body transformation parameters. , 1995, Journal of biomechanics.

[27]  David A. Winter,et al.  Biomechanics and Motor Control of Human Movement , 1990 .

[28]  Murray Mp,et al.  Shoulder motion and muscle strength of normal men and women in two age groups. , 1985, Clinical orthopaedics and related research.

[29]  J Ekholm,et al.  Shoulder joint load and muscular activity during lifting. , 2020, Scandinavian journal of rehabilitation medicine.