4,237 research outputs found
Impairment of muscle strength and joint range of motion and their impact on the quality of life in older adults
No full textThe effect of ageing on isometric strength through joint range at knee and hip joints in three age groups of older adults
No full textStrength of lower extremity muscles is an important determinant of mobility-based functional activities. Loss of strength with age produces functional limitation in activities of daily living such as rising from a chair or stair negotiation. However, there is limited information on the effect of age-related changes on the torque-producing ability of muscles through their ranges of joint motion. To investigate the effect of ageing on the torque-producing ability of lower extremity muscles in a large sample of older adults in three age groups. Eighty-two volunteers participated in this study and were divided into six groups according to their chronological age (60s, 70s and 80s and above) and gender (male, female). Isometric muscle strength was measured at the knee and hip joints at three positions through the joint range using a custom-built strain gauge torque dynamometer and a purpose built plinth. The peak torque of major muscle groups of the knee and hip joints decreased with increasing age at all the three joint positions at which strength was tested. The 80-year-olds had 20% lower strength compared to the 60-year-olds. Age-related decrease in muscle strength was significant when comparing 80-year-olds with the 60-year-olds (p < 0.05). Strength loss was noted to be higher at the inner (muscle is shortened from mid-position) and outer (muscle is lengthened from mid-position) ranges of muscle action when compared with the mid-range position (mid-position). Gender-based differences were significant for all the strength tests (p < 0.05). Strength decreased with increasing age at all the positions within joint range of motion for knee and hip joints. However, the percentage loss of muscle strength was different at different positions in the joint range. Our findings suggest that muscle strength was more preserved in the middle range of muscle function compared to the inner and outer range of muscle action. In older people, lower extremity muscles might be required to produce higher moments in joint positions that are not within the optimum mid-position for muscle action
An investigation into hip muscle strength and biomechanical moments produced during chair sit down in older adults
No full textBackground Muscle strength is an important component of performance and is a vital measure for characterisation of functional capability in everyday activities. Currently, there is little evidence with regard to the impact of loss of strength at the hip joint on the ability to perform a chair sit down activity in older adults.Method A custom-built torque dynamometer was used to measure muscle strength of hip extensors in 82 older adults who were aged 60 years and over. Isometric strength was measured at three positions namely 45°,30° and 0° of hip flexion within the joint range of motion. Biomechanical analysis with Vicon motion analysis system and Kistler force platforms was performed to determine functional moments produced during chair sit down.Results Muscle strength decreased with increasing age for hip extensors in all the three joint positions. The 80 year olds had lower strengths (22% ± 3%) compared to those in the younger age cohorts and the differences were statistically significant. (P value <0.05) Hip extensor strength was significantly correlated with functional moments with a correlation coefficient r =0.47. (P value = <0.001)Conclusion This investigation showed that poor hip extensor strength was associated with reduced functional moments produced at hip during chair sit down in older adults. Hence, loss of muscle strength with advancing age is likely to increase the demands of performing this activity in older adults
A biomechanical investigation into hip muscle strength through joint range and moments produced during chair rise in older adults
No full textThe Relationship between isometric muscle strength measured through joint range and quality of life in older adults
No full textAn investigation into knee muscle strength through joint range and functional moments produced during chair rise in older adults. [In: Proceedings of SRR, pp.639-640]
No full textBackground: The ability to perform a chair rise is an
important physical function and is a precursor for many
mobility functions. Biomechanically, rising from a chair
is observed to be a highly demanding task for older
adults. Hence, the relationship between knee extensor
strength and functional moments produced during
chair rise was investigated in a large sample of older
adult
Architectural drawing of Balmain-Rozelle Memorial Hall drawn by P.J. Rowe [picture] /
No full textTitle devised by cataloguer from accompanying documentation.; Part of the Collection of photographs of Sydney by A.G. Foster.; Condition: Silvering.; Also available in an electronic version via the Internet at: http://nla.gov.au/nla.pic-vn3112022. Inscriptions; right hand corner: "Rowe & England Architects, Dixon Building, 64 Pitt St., Sydney.; left hand corner:"F.S. Rowe, INVT. ET. DELT, 1922
Past veterinarians in South Africa
No full textAn alphabetical list containing short biographies of all deceased South African veterinarians up to 1990.[compiled by] P.J. (Bill) PosthumusVolume 1: AL -- Volume 2: M-ZAlso available in print http://137.215.9.20/record=b1893606ab2013ab201
Open brief aan den WelEdel. Gestr. Heer P.J. Joubert
No full textleyds-70-7201.pdf created from original pamphlet in the WJ Leyds Collection held in the Africana Section of the Stellenbosch University Library and Information Service.Dutch open letter to P.J. Joubert concerning a railroad concession granted to the author and two of his friends in 1885
The functional demand placed on the knee flexors and extensors of older adults when undertaking activities of daily living
No full textThe study describes activity patterns of rectus femoris (RF) and Vastii in 20 patients with chronic stroke who walked with a stiff-knee gait
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