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Concentric isokinetic torque characteristics of the calf muscles of active women aged 20 to 84 years.
J Orthop Sports Phys Ther. 1999 Mar; 29(3):181-90.JO

Abstract

STUDY DESIGN

Descriptive, comparative, and correlational study of nonimpaired, active women in 3 age groups.

OBJECTIVES

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.

BACKGROUND

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.

METHODS AND MEASURES

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.

RESULTS

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).

CONCLUSIONS

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.

Authors+Show Affiliations

Physical Therapy Department, School of Pharmacy and Allied Health Sciences, University of Montana, Missoula 59812-1076, USA. rgagdos@selway.umt.eduNo affiliation info availableNo affiliation info available

Pub Type(s)

Clinical Trial
Comparative Study
Journal Article
Randomized Controlled Trial
Research Support, Non-U.S. Gov't

Language

eng

PubMed ID

10322592

Citation

Gajdosik, R L., et al. "Concentric Isokinetic Torque Characteristics of the Calf Muscles of Active Women Aged 20 to 84 Years." The Journal of Orthopaedic and Sports Physical Therapy, vol. 29, no. 3, 1999, pp. 181-90.
Gajdosik RL, Vander Linden DW, Williams AK. Concentric isokinetic torque characteristics of the calf muscles of active women aged 20 to 84 years. J Orthop Sports Phys Ther. 1999;29(3):181-90.
Gajdosik, R. L., Vander Linden, D. W., & Williams, A. K. (1999). Concentric isokinetic torque characteristics of the calf muscles of active women aged 20 to 84 years. The Journal of Orthopaedic and Sports Physical Therapy, 29(3), 181-90.
Gajdosik RL, Vander Linden DW, Williams AK. Concentric Isokinetic Torque Characteristics of the Calf Muscles of Active Women Aged 20 to 84 Years. J Orthop Sports Phys Ther. 1999;29(3):181-90. PubMed PMID: 10322592.
* Article titles in AMA citation format should be in sentence-case
TY - JOUR T1 - Concentric isokinetic torque characteristics of the calf muscles of active women aged 20 to 84 years. AU - Gajdosik,R L, AU - Vander Linden,D W, AU - Williams,A K, PY - 1999/5/14/pubmed PY - 1999/5/14/medline PY - 1999/5/14/entrez SP - 181 EP - 90 JF - The Journal of orthopaedic and sports physical therapy JO - J Orthop Sports Phys Ther VL - 29 IS - 3 N2 - STUDY DESIGN: Descriptive, comparative, and correlational study of nonimpaired, active women in 3 age groups. OBJECTIVES: 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. BACKGROUND: 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. METHODS AND MEASURES: 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. RESULTS: 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). CONCLUSIONS: 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. SN - 0190-6011 UR - https://www.unboundmedicine.com/medline/citation/10322592/Concentric_isokinetic_torque_characteristics_of_the_calf_muscles_of_active_women_aged_20_to_84_years_ L2 - https://www.jospt.org/doi/10.2519/jospt.1999.29.3.181?url_ver=Z39.88-2003&rfr_id=ori:rid:crossref.org&rfr_dat=cr_pub=pubmed DB - PRIME DP - Unbound Medicine ER -