The quadriceps femoris muscle in 20–70‐year‐old subjects: Relationship between knee extension torque, electrophysiological parameters, and muscle fiber characteristics

Stålberg, Erik; Borges, O.; Ericsson, Martin; Essén‐Gustavsson, Birgitta; Fawcett, Peter; Nordesjö, Lars‐Olof; Nordgren, Bengt; Uhlin, R.

doi:10.1002/mus.880120508

Cited by 105 publications

(63 citation statements)

References 21 publications

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“…Isometric muscle strength loss was reported to begin at an earlier age, but at a slower rate, in women (64); thus, the percentage of loss would be less in women (65,66). Our data of a less-rapid decline in women are consistent with these results.…”

Section: Sex Differencessupporting

confidence: 82%

Even mealtime distribution of protein intake is associated with greater muscle strength, but not with 3-y physical function decline, in free-living older adults: the Quebec longitudinal study on Nutrition as a Determinant of Successful Aging (NuAge study)

Farsijani¹,

Payette²,

Morais

et al. 2017

The American Journal of Clinical Nutrition

104

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Background: Functional status declines with aging, thus impeding autonomy. Recently, a more even mealtime distribution of dietary protein was positively associated with muscle mass, but the relation of this distribution to physical performance remains unknown. Objective: We examined the relation between mealtime proteinintake distribution and physical performance and its 3-y decline in community-dwelling older adults. Design: Three-year follow-up data from 827 men and 914 women (67-84 y) in the longitudinal study on nutrition and aging [Quebec longitudinal study on Nutrition as a Determinant of Successful Aging (NuAge study); Quebec, Canada] were analyzed. Physical performance, which was measured yearly, was grouped into the following 2 functional composite scores: muscle strength (handgrip, arm, and leg) and mobility (timed-up-and-go, chair stand, and walking speed). Dietary data were collected in 2 sets of three 24-h food recalls at baseline and year 2. The individual mealtime protein distribution was calculated as the CV (i.e., SD divided by the mean) of grams of protein per meal. A mixed model analysis was used to examine trajectories of muscle strength and mobility across time by sex as conditioned by the protein distribution and adjusted for potential covariates. Results: Physical performance deteriorated over 3 y with muscle strength declining more than the mobility score in men (21.51 6 1.68 compared with 20.66 6 2.81) and women (21.35 6 1.77 compared with 20.78 6 2.63) (means 6 SD, P , 0.001). More-evenly distributed protein intake, independent of the total quantity, was associated with a higher muscle-strength score in both sexes throughout followup. It was also associated with a greater mobility score, but only in men and only before adjustment for covariates. Strength and mobility rates of decline were not affected by protein-intake distribution in either sex. Conclusions: In addition to the previously observed association with lean mass, an even distribution of daily protein intake across meals is independently associated with greater muscle strength, but not with the mobility score, in older adults. A longer-term investigation of the role of protein intake and its distribution on physical performance is warranted, as are intervention studies, to support future recommendations.Am J Clin Nutr 2017;106:113-24.

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Section: Sex Differencessupporting

confidence: 82%

Even mealtime distribution of protein intake is associated with greater muscle strength, but not with 3-y physical function decline, in free-living older adults: the Quebec longitudinal study on Nutrition as a Determinant of Successful Aging (NuAge study)

Farsijani¹,

Payette²,

Morais

et al. 2017

The American Journal of Clinical Nutrition

104

View full text Add to dashboard Cite

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“…It should be emphasized that the relationships observed are relatively weak, and, therefore, that conclusions must be drawn from the present study with caution. The weak correlations are not surprising in view of the fact that other factors are also likely to determine medical consumption, and that the measurement of muscle strength usually has important interindividual variability [27,28]. Psychosocial factors may also be related to the utilization of health care resources.…”

Section: Discussionmentioning

confidence: 99%

Muscle weakness is related to utilization of health care resources in COPD patients

Decramer¹,

Gosselink²,

Troosters³

et al. 1997

Eur Respir J

403

236

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The factors determining utilization of health care resources in patients with chronic obstructive pulmonary disease (COPD) are poorly understood. In order to obtain insight into these factors, we studied the utilization of health care resources in 57 stable COPD patients with a forced expiratory volume in one second (FEV1) of 36±9% predicted.Patients were divided into two groups: admitted at least twice in the last year (high medical consumption; n=23) or not admitted in the last year (low medical consumption; n=34). Other variables related to utilization of health care resources studied were: the number of hospital days; the number of out-patient visits to a pulmonary department in the last year; and the average daily dose (ADD) of corticosteroids taken in the last 6 months. The actual cost of utilization of health care resources, however, was not studied. In addition, pulmonary function, serum electrolytes, blood gas values, 6 min walking distance, respiratory and peripheral muscle force, and appraisal of self-care agency (ASA score) were studied.Pulmonary function, serum electrolytes, blood gas values, ASA score and walking distance were not different between the two groups (e.g. FEV1 36±8 vs 36±10% pred). Respiratory muscle forces tended to be lower in the high medical consumption group, this tendency almost reaching statistical significance for maximal expiratory pressure (PE,max) (p=0.08). Peripheral muscle force, however, was clearly reduced in the high medical consumption group (quadriceps force 63±20 vs 82±26% pred; p<0.05). The number of admissions, the number of hospital days, the number of out-patient visits, and ADD were interrelated and also related to ventilatory and peripheral muscle force (r -0.18 to -0.38). This relationship was statistically significant for PE,max, whilst a similar tendency was present for maximal inspiratory pressure (PI,max). In stepwise multiple regression analysis, only quadriceps force was a significant determinant of utilization of health care services.We conclude that utilization of health care services in patients with chronic obstructive pulmonary disease is related to ventilatory and peripheral muscle force. Whether or not reduced muscle force is simply an expression of disease severity remains to be determined.

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“…In addition to that, advancing age leads to deficits in the processing of sensory input (myelin abnormalities, axonal atrophy, and declined nerve conduction velocity) [7,24,59,74] and neuromuscular performance decline. It has been shown that the older adult has fewer, but on average larger and slower motor units, resulting in motor unit reorganization [9,14,40,65,66]. Therefore, this age-related alteration of the number and function of motor units have profound implications in muscle force production and control.…”

Section: Mechanisms Of Proprioception Deterioration With Agingmentioning

confidence: 99%

Aging effects on joint proprioception: the role of physical activity in proprioception preservation

Ribeiro

Oliveira

2007

Eur Rev Aging Phys Act

179

115

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Throughout the human life span the functions of several physiological systems dramatically change, including proprioception. Impaired proprioception leads to less accurate detection of body position changes increasing the risk of fall, and to abnormal joint biomechanics during functional activities so, over a period of time, degenerative joint disease may result. Altered neuromuscular control of the lower limb and consequently poor balance resulting from changes in the proprioceptive function could be related to the high incidence of harmful falls that occur in old age subjects. There is evidence of proprioception deterioration with aging. Regular physical activity seems to be a beneficial strategy to preserve proprioception and prevent falls among older subjects. Some studies have demonstrated that the regular physical activity can attenuate age-related decline in proprioception. This paper reviews the evidence of age effects on joint proprioception. We will discuss the possible mechanisms behind these effects and the role of regular physical activity in the attenuation of age-related decline in proprioception.

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The quadriceps femoris muscle in 20–70‐year‐old subjects: Relationship between knee extension torque, electrophysiological parameters, and muscle fiber characteristics

Cited by 105 publications

References 21 publications

Even mealtime distribution of protein intake is associated with greater muscle strength, but not with 3-y physical function decline, in free-living older adults: the Quebec longitudinal study on Nutrition as a Determinant of Successful Aging (NuAge study)

Even mealtime distribution of protein intake is associated with greater muscle strength, but not with 3-y physical function decline, in free-living older adults: the Quebec longitudinal study on Nutrition as a Determinant of Successful Aging (NuAge study)

Muscle weakness is related to utilization of health care resources in COPD patients

Aging effects on joint proprioception: the role of physical activity in proprioception preservation

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