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Concentric Isokinetic Torque Characteristics of the Calf Muscles of Active Women Aged 20 to 84 Years
- Source :
- Journal of Orthopaedic & Sports Physical Therapy. 29:181-190
- Publication Year :
- 1999
- Publisher :
- Journal of Orthopaedic & Sports Physical Therapy (JOSPT), 1999.
-
Abstract
- Descriptive, comparative, and correlational study of nonimpaired, active women in 3 age groups.We described age-related concentric isokinetic torque of plantar flexion (PF) of active women and examined the proposal that PF torque at slow to rapid velocities would be influenced by age-related slower muscle contractile properties. We also examined the relationship of age to passive and active force characteristics of the calf muscle.Aging is associated with decreased calf muscle strength, slower muscle contractile properties, and decreased dorsiflexion (DF) range of motion. Clinical methods of measuring these changes in the calf muscles have not been described adequately.24 younger women (20 to 39 years), 24 middle-aged women (40 to 59 years), and 33 older women (60 to 84 years) performed maximal concentric PF of the right ankle from maximal passive DF at randomly ordered velocities of 30 degrees.s-1, 60 degrees.s-1, 120 degrees.s-1, and 180 degrees.s-1. The peak and mean torques and "angular delay" (degree) from the onset of movement to peak torque were examined using ANOVA. Age was correlated (Pearson product moment r) with the peak and mean torques, "angular delay," velocity at peak torque for 180 degrees.s-1, and the maximal passive DF angle and torque.The peak and mean torques decreased with increasing age and velocities. The angular delay at 180 degrees.s-1 decreased with increasing age. Age was negatively correlated with the peak and mean torques (range, r = -0.60 to -0.73), the "angular delay" at all velocities (range, r = -0.44 to -0.64), the maximal passive DF angle (r = -0.73) and torque (r = -0.60), and with the peak torque velocity at 180 degrees.s-1 (r = -0.29).The results indicate age-related changes for the concentric isokinetic torque of the calf muscles of active women. The angular delay at 180 degrees.s-1 may show changes influenced by slower muscle contractile properties. Concurrent age-related declines in passive and active calf muscle force characteristics were demonstrated.
- Subjects :
- Adult
Aging
medicine.medical_specialty
Time Factors
Physical Therapy, Sports Therapy and Rehabilitation
Electromyography
Concentric
Calf muscles
Physical medicine and rehabilitation
Humans
Medicine
Range of Motion, Articular
Muscle, Skeletal
Aged
Aged, 80 and over
Analysis of Variance
medicine.diagnostic_test
Foot
business.industry
Reproducibility of Results
Signal Processing, Computer-Assisted
General Medicine
Middle Aged
Clinical method
Muscle Fibers, Slow-Twitch
Torque
Correlational study
Active force
Multivariate Analysis
Physical therapy
Female
Stress, Mechanical
Isokinetic torque
business
Range of motion
Ankle Joint
Muscle Contraction
Subjects
Details
- ISSN :
- 19381344 and 01906011
- Volume :
- 29
- Database :
- OpenAIRE
- Journal :
- Journal of Orthopaedic & Sports Physical Therapy
- Accession number :
- edsair.doi.dedup.....b9bb09d32a60be3cc2c12e2e60bf1695