scholarly journals Reliability of Lower Extremity Muscle Power and Functional Performance in Healthy, Older Women

2021 ◽  
Vol 2021 ◽  
pp. 1-9
Author(s):  
Konstantina Katsoulis ◽  
Sunita Mathur ◽  
Catherine E. Amara
Keyword(s):  
Lower Extremity ◽  
Older Women ◽  
Muscle Power ◽  
Functional Performance ◽  
Plantar Flexion ◽  
Knee Extension ◽  
Lower Body ◽  
Lower Extremity Muscle ◽  
Very High

Evaluation of the long-term reliability of muscle power and functional performance tests in older, healthy adults is warranted since determining whether performance is consistent over longer durations is more relevant for intervention studies. Objective. To assess the long-term test–retest reliability of measures of muscle power and lower body functional performance in healthy, nonexercising, older women. Methods. Data were derived from a nonexercising control group (n = 18; age = 73.3 (3.4) years; height = 159.6 (7.7) cm; body mass = 69.5 (12.7) kg; BMI = 27.3 (4.8)) of a randomized controlled trial of muscle power training in older women. Participants underwent lower extremity muscle power (Biodex) and functional testing (Short Physical Performance Battery, gait speed, 30-second chair stands, stair climbing, and 400-meter walk) at week 0 (baseline), 9, and 15. Results. For the upper leg, intraclass correlation coefficients (ICCs) were very high for knee extension power (0.90–0.97) and high to very high for knee flexion power (0.83–0.96). For lower-leg power, ICCs were high to very high for plantar flexion and dorsiflexion (0.83–0.96). ICCs for functional performance were moderate to very high (0.64–0.93). Coefficient of variation of the typical error (CVTE) was <10.5% for knee extension/flexion power, 9.9–20.0% for plantar flexion/dorsiflexion power, and 1.9–14.9% for functional performance. Knee extension power and stair climb power demonstrated the highest reliability for muscle power and function, respectively. Mean values did not change over time, with the exception of the chair stands ( p < 0.05 ); however, these changes were not considered clinically meaningful. Conclusions. The current study provides evidence supporting the long-term reliability of performance assessments of muscle power and lower body functional capacity over a period of up to 15 weeks in healthy, older women.

Age-associated changes in skeletal muscles and their effect on mobility: an operational diagnosis of sarcopenia

2003 ◽  
Vol 95 (5) ◽  
pp. 1851-1860 ◽  
Author(s):  
Fulvio Lauretani ◽  
Cosimo Roberto Russo ◽  
Stefania Bandinelli ◽  
Benedetta Bartali ◽  
Chiara Cavazzini ◽  
...  
Keyword(s):  
Lower Extremity ◽  
Muscle Function ◽  
Older Persons ◽  
Muscle Power ◽  
Knee Extension ◽  
Calf Muscle ◽  
Isometric Handgrip ◽  
Muscle Area ◽  
Men And Women ◽  
Lower Extremity Muscle

Sarcopenia, the reduction of muscle mass and strength that occurs with aging, is widely considered one of the major causes of disability in older persons. Surprisingly, criteria that may help a clinician to identify persons with impaired muscle function are still lacking. Using data from a large representative sample of the general population, we examined how muscle function and calf muscle area change with aging and affect mobility in men and women free of neurological conditions. We tested several putative indicators of sarcopenia, including knee extension isometric torque, handgrip, lower extremity muscle power, and calf muscle area. For each indicator, sarcopenia was considered to be present when the measure was >2 SDs below the mean. For all four measures, the prevalence of sarcopenia increased with age, both in men and women. The age-associated gradient in prevalence was maximum for muscle power and minimum for calf-muscle area. However, lower extremity muscle power was no better than knee-extension torque or handgrip in the early identification of poor mobility, defined either as walking speed <0.8 m/s or inability to walk at least 1 km without difficulty and without developing symptoms. Optimal cutoff values that can be used in the clinical practice to identify older persons with poor mobility were developed. The findings of the study lay the basis for a cost-effective, clinical marker of sarcopenia based on a measure of isometric handgrip strength. Our findings should be verified in a longitudinal study.

scholarly journals Lower extremity muscle power – A critical determinant of physical function in aging and multiple sclerosis

2021 ◽  
pp. 111347
Author(s):  
Rasmus A.W. Stagsted ◽  
Cintia Ramari ◽  
Anders G. Skjerbaek ◽  
Cecilie Thrue ◽  
Ulrik Dalgas ◽  
...  
Keyword(s):  
Multiple Sclerosis ◽  
Lower Extremity ◽  
Physical Function ◽  
Muscle Power ◽  
Critical Determinant ◽  
Lower Extremity Muscle

scholarly journals Long-term participation in community group exercise improves lower extremity muscle strength and delays age-related declines in walking speed and physical function in older adults

2021 ◽  
Vol 18 (1) ◽  
Author(s):  
Chisato Hayashi ◽  
Soshiro Ogata ◽  
Tadashi Okano ◽  
Hiromitsu Toyoda ◽  
Sonoe Mashino
Keyword(s):  
Older Adults ◽  
Muscle Strength ◽  
Physical Exercise ◽  
Lower Extremity ◽  
Physical Function ◽  
Community Dwelling ◽  
Group Exercise ◽  
Community Based ◽  
Lower Extremity Muscle

Abstract Background The effects of group exercise on the physical function of community-dwelling older adults remain unclear. The changes in lower extremity muscle strength, timed up and go (TUG) time, and the motor fitness scale (MFS), over time, among older adults who expressed a willingness to participate in community-based physical exercise groups, were determined using multilevel modelling. Methods We analyzed data of 2407 older adults between April 2010 and December 2019 from the registry of physical tests of community-based physical exercise groups. We conducted a retrospective cohort study to assess the effect of physical exercise on lower extremity muscle strength, TUG time, and MFS scores. The durations of the exercises were evaluated by frequency of physical test’s participate. Results A deterioration in lower extremity muscle strength was found in the short-term participant group only. However, in the mid-term and long-term participation groups, lower extremity muscle strength showed a trend of improvement. The TUG time and the MFS score were negatively correlated with increasing age in both groups divided by the duration of participation. However, there was a slower rate of deterioration in the long-term participation group. Discussion Lower extremity muscle strength, TUG time, and MFS scores decline with increasing age and there were differences in the slope of deterioration that depended on the duration of participation in community-based group exercise. Conclusion Participation in group exercise improved lower extremity muscle strength, TUG time, and MFS scores of older adults living in a community. The positive effects of group exercise were dependent on long-term participation.

The Relationship between Knee Extension Strength and Activities of Daily Living in Patients with Dementia

2011 ◽  
pp. 244-256
Author(s):  
Makoto Suzuki ◽  
Hikari Kirimoto ◽  
Atsushi Inamura ◽  
Yoshitsugu Omori ◽  
Sumio Yamada
Keyword(s):  
Lower Extremity ◽  
Activities Of Daily Living ◽  
Daily Living ◽  
Functional Independence Measure ◽  
Knee Extensor ◽  
Functional Independence ◽  
Knee Extension ◽  
Daily Activities ◽  
Lower Body ◽  
Knee Extensor Strength

The purpose of this study was to examine the test-retest reliability of hand-held dynamometer measurements in patients with dementia and determine if predictions about a patient’s ability to perform daily activities can be made from knee extension strength measurements. This study was composed of two rounds of data collection. Sixty patients with dementia were enrolled in the first round to assess the reliability of hand-held dynamometer measurements, and 54 patients with dementia were enrolled in the second round for predicting their ability to perform daily activities. Knee extensor strength was measured twice, separated by a three minute interval, with hand-held dynamometer. The authors also assessed daily activities related to the patient’s lower extremities, including dressing the lower body, using the toile, transferring to the bed/toilet/shower, and walking. Lower extremity activities of the Functional Independence Measure were assessed by the nursing home caregiver that had the most regular contact with each subject. When the Functional Independence Measure score of each lower extremity function was =6 points, the subject was considered to be independent. The intraclass correlation coefficient was 0.97. Bland-Altman plots showed the 95% difference value to be within 2 SDs of the mean. The curves of negative and positive predictive values revealed the following threshold levels: 0.8 Nm/kg was the best predictor for dressing the lower body and using the toilet; 1.2 Nm/kg was the best predictor for transferring to the bed/toilet/shower; and 0.6 Nm/kg was the best predictor for gait performance. Strength measurements taken with a hand-held dynamometer were reliable in patients with dementia, and normalized knee extensor strength was found to be a predictor of the ability to perform activities of daily living.

scholarly journals Relationship between Lower Extremity Muscle Mass, Leg Extension Strength and Muscle Power of Hemiplegic Stroke Patients

2011 ◽  
Vol 23 (2) ◽  
pp. 277-282 ◽  
Author(s):  
Toshifumi Fujita ◽  
Manabu Iwata ◽  
Michitaka Fukuda ◽  
Minoru Ikeda
Keyword(s):  
Lower Extremity ◽  
Muscle Mass ◽  
Muscle Power ◽  
Stroke Patients ◽  
Leg Extension ◽  
Lower Extremity Muscle

MUSCLE POWER OF THE ANKLE FLEXORS PREDICTS FUNCTIONAL PERFORMANCE IN COMMUNITY DWELLING OLDER WOMEN

2001 ◽  
Vol 33 (5) ◽  
pp. S344
Author(s):  
R A. Fielding ◽  
T Suzuki ◽  
J Bean
Keyword(s):  
Older Women ◽  
Muscle Power ◽  
Functional Performance ◽  
Community Dwelling

scholarly journals Effects of combined exercise on changes of lower extremity muscle activation during walking in older women

2015 ◽  
Vol 27 (5) ◽  
pp. 1515-1518 ◽  
Author(s):  
Jaehyun Park ◽  
Joongsook Lee ◽  
Jeongok Yang ◽  
Bomjin Lee ◽  
Dongwook Han
Keyword(s):  
Lower Extremity ◽  
Older Women ◽  
Muscle Activation ◽  
Combined Exercise ◽  
Lower Extremity Muscle

Protein Intake and Physical Performance Following Long-Term Stay on the International Space Station

2021 ◽  
Vol 92 (3) ◽  
pp. 153-159
Author(s):  
Yuko Nozawa ◽  
Yukiko Wagatsuma
Keyword(s):  
Physical Performance ◽  
Protein Intake ◽  
Plantar Flexion ◽  
Space Station ◽  
Knee Extension ◽  
Carbohydrate Intake ◽  
International Space ◽  
Exercise Effect ◽  
Ankle Plantar Flexion

INTRODUCTION: Exposure to microgravity reduces muscle mass, volume, and performance. The ingestion of protein, especially combined with carbohydrate intake and exercise after ingestion, improves net muscle protein synthesis and increases muscle mass. However, there are few studies on this relationship during and after a long-term spaceflight. The objective of this study was to investigate the influence of protein and the combined effects of carbohydrate intake on muscle performance following long-term spaceflight.METHODS: This study is a retrospective cohort study involving secondary analysis of data stored in the NASA Lifetime Surveillance of Astronaut Health Repository. Multivariable analysis was performed to evaluate the impact of protein intake on physical performance by considering covariates potentially associated with each model.RESULTS: After adjusting for sex, age, flight week, energy intake, and preflight physical performance, protein intake was found to be significantly associated with concentric measurements for knee extension ( 51.66), ankle plantar flexion ( 32.86), and eccentric measurements for ankle plantar flexion ( 79.85) at 5 d after landing. Significant associations remained after controlling for exercise effect. No significant interaction between protein and carbohydrate intake was observed in either model.DISCUSSION: Protein intake during spaceflight was related to physical performance for knee extension and ankle plantar flexion, even after taking exercise effect into consideration. However, protein and carbohydrate intake provided no synergetic benefit. This suggests that high protein intake, about twice the current average intake, may serve as a countermeasure to offset the negative effects of long-duration spaceflights.Nozawa Y, Wagatsuma Y. Protein intake and physical performance following long-term stay on the International Space Station. Aerosp Med Hum Perform. 2021; 92(3):153159.

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