Erratum to: Association between ultrasound measurements of muscle thickness, pennation angle, echogenicity and skeletal muscle strength in the elderly

Bioelectrical impedance analysis (BIA) is used to assess skeletal muscle mass, although its application in the elderly has not been fully established. Several BIA modalities are available: single-frequency BIA (SFBIA), multifrequency BIA (MFBIA), and bioelectrical impedance spectroscopy (BIS). The aim of this study was to examine the difference between SFBIA, MFBIA, and BIS for assessment of appendicular skeletal muscle strength in the elderly. A total of 405 elderly (74.2 ± 5.0 yr) individuals were recruited. Grip strength and isometric knee extension strength were measured. Segmental SFBIA, MFBIA, and BIS were measured for the arms and upper legs. Bioelectrical impedance indexes were calculated by squared segment length divided by impedance ( L2/Z). Impedance at 5 and 50 kHz (Z5 and Z50) was used for SFBIA. Impedance of the intracellular component was calculated from MFBIA (Z250-5) and BIS (RICW). Correlation coefficients between knee extension strength and L2/Z5, L2/Z50, L2/RICW, and L2/Z250-5 of the upper legs were 0.661, 0.705, 0.790, and 0.808, respectively ( P < 0.001). Correlation coefficients were significantly greater for MFBIA and BIS than SFBIA. Receiver operating characteristic curves showed that L2/Z250-5 and L2/RICW had significantly larger areas under the curve for the diagnosis of muscle weakness compared with L2/Z5 and L2/Z50. Very similar results were observed for grip strength. Our findings suggest that MFBIA and BIS are better methods than SFBIA for assessing skeletal muscle strength in the elderly.

Download Full-text

Correlation between age, muscle architecture, and muscle strength in children with Erb’s palsy

Bulletin of Faculty of Physical Therapy ◽

10.1186/s43161-021-00029-9 ◽

2021 ◽

Vol 26 (1) ◽

Author(s):

Ahmed Saad Awad ◽

Mostafa Soliman Ali ◽

Mohamed Ismail Elassal

Keyword(s):

Muscle Strength ◽

Muscle Weakness ◽

Muscle Thickness ◽

Study Groups ◽

Pennation Angle ◽

Muscle Architecture ◽

Active Movement ◽

Significant Relation ◽

Erb’S Palsy ◽

Significant Difference

Abstract Background Muscle weakness is a widespread problem in children with Erb’s palsy as it can cause changes in muscle architecture parameters, which can be detected by ultrasonography. This study was conducted to determine the relation between age, muscle architecture, and muscle strength in children with Erb’s palsy. A total of 40 children with Erb’s palsy from both sexes aged 1–2.5 years were included in this study. Muscle thickness and pennation angle were measured by ultrasonography, and muscle strength was measured using the active movement scale. Results A significant relation was found between age, muscle thickness, pennation angle, and muscle strength (P < 0.05). Moreover, a significant difference was found in muscle architecture parameters during relaxation and contraction in both study groups and in each study group (P < 0.05). Conclusion Muscle weakness in children with Erb’s palsy has an effect on muscle architecture parameters, and these parameters also increase with age.

Download Full-text

Live strong and prosper: the importance of skeletal muscle strength for healthy ageing

Biogerontology ◽

10.1007/s10522-015-9631-7 ◽

2016 ◽

Vol 17 (3) ◽

pp. 497-510 ◽

Cited By ~ 56

Author(s):

Michael McLeod ◽

Leigh Breen ◽

D. Lee Hamilton ◽

Andrew Philp

Keyword(s):

Skeletal Muscle ◽

Muscle Strength ◽

Healthy Ageing ◽

Skeletal Muscle Strength

Download Full-text

Respiratory and Skeletal Muscle Strength in Chronic Obstructive Pulmonary Disease

Journal of Cardiopulmonary Rehabilitation and Prevention ◽

10.1097/hcr.0b013e3182033663 ◽

2011 ◽

Vol 31 (2) ◽

pp. 111-119 ◽

Cited By ~ 40

Author(s):

Jonathan Singer ◽

Edward H. Yelin ◽

Patricia P. Katz ◽

Gabriela Sanchez ◽

Carlos Iribarren ◽

...

Keyword(s):

Chronic Obstructive Pulmonary Disease ◽

Skeletal Muscle ◽

Muscle Strength ◽

Pulmonary Disease ◽

Chronic Obstructive ◽

Obstructive Pulmonary Disease ◽

Skeletal Muscle Strength

Download Full-text

Targeted ablation of IKK2 improves skeletal muscle strength, maintains mass, and promotes regeneration

Journal of Clinical Investigation ◽

10.1172/jci28721e1 ◽

2007 ◽

Vol 117 (1) ◽

pp. 277-277

Author(s):

Foteini Mourkioti ◽

Paschalis Kratsios ◽

Tom Luedde ◽

Yao-Hua Song ◽

Patrick Delafontaine ◽

...

Keyword(s):

Skeletal Muscle ◽

Muscle Strength ◽

Skeletal Muscle Strength

Download Full-text

PRELIMINARY ANALYSIS OF THE EFFECTS OF STATINS ON FUNCTIONAL PERFORMANCE AND SKELETAL MUSCLE STRENGTH DURING CARDIAC REHABILITATION

Cardiopulmonary Physical Therapy Journal ◽

10.1097/01823246-201223040-00012 ◽

2012 ◽

Vol 23 (4) ◽

pp. 29-30

Author(s):

L Healey ◽

D E Forman ◽

L P Cahalin

Keyword(s):

Skeletal Muscle ◽

Muscle Strength ◽

Cardiac Rehabilitation ◽

Preliminary Analysis ◽

Functional Performance ◽

Skeletal Muscle Strength

Download Full-text

Combined Training Enhances Skeletal Muscle Mitochondrial Oxidative Capacity Independent of Age

The Journal of Clinical Endocrinology & Metabolism ◽

10.1210/jc.2014-3081 ◽

2015 ◽

Vol 100 (4) ◽

pp. 1654-1663 ◽

Cited By ~ 53

Author(s):

Brian A. Irving ◽

Ian R. Lanza ◽

Gregory C. Henderson ◽

Rajesh R. Rao ◽

Bruce M. Spiegelman ◽

...

Keyword(s):

Older Adults ◽

Skeletal Muscle ◽

Body Composition ◽

Transcription Factors ◽

Muscle Strength ◽

Oxidative Capacity ◽

Physical Characteristics ◽

Mitochondrial Proteins ◽

Combined Training ◽

Skeletal Muscle Strength

Context: Skeletal muscle from sedentary older adults exhibits reduced mitochondrial abundance and oxidative capacity. Objective: The primary objective was to determine whether 8 weeks of combined training (CT) has a more robust effect than endurance training (ET) or resistance training (RT) on mitochondrial physiology in healthy young (18–30 years) and older (≥65 years) adults. Intervention: Thirty-four young and 31 older adults were randomly assigned to 8 weeks of ET, RT, and control/CT. Control subjects completed 8 weeks of no exercise (control) followed by 8 weeks of CT. Body composition, skeletal muscle strength, and peak oxygen uptake were measured before and after the intervention. Vastus lateralis muscle biopsy samples were obtained before and 48 hours after the intervention. Mitochondrial physiology was evaluated by high-resolution respirometry and expression of mitochondrial proteins and transcription factors by quantitative PCR and immunoblotting. Results: ET and CT significantly increased oxidative capacity and expression of mitochondrial proteins and transcription factors. All training modalities improved body composition, cardiorespiratory fitness, and skeletal muscle strength. CT induced the most robust improvements in mitochondria-related outcomes and physical characteristics despite lower training volumes for the ET and RT components. Importantly, most of the adaptations to training occurred independent of age. Conclusion: Collectively, these results demonstrate that both ET and CT increase muscle mitochondrial abundance and capacity although CT induced the most robust improvements in the outcomes measured. In conclusion, CT provides a robust exercise regimen to improve muscle mitochondrial outcomes and physical characteristics independent of age.

Download Full-text