Age‐specific neuromuscular interaction during elderly habitual running

B-mode ultrasound is often used to quantify muscle architecture during movements. Our objectives were to 1) systematically review the reliability of fascicle length (FL) and pennation angles (PA) measured using ultrasound during movements involving voluntary contractions; 2) systematically review the methods used in studies reporting reliability, discuss associated challenges, and provide recommendations to improve the reliability and validity of dynamic ultrasound measurements; and 3) provide an overview of computational approaches for quantifying fascicle architecture, their validity, agreement with manual quantification of fascicle architecture, and advantages and drawbacks. Three databases were searched until June 2019. Studies among healthy human individuals aged 17–85 yr that investigated the reliability of FL or PA in lower-extremity muscles during isoinertial movements and that were written in English were included. Thirty studies ( n = 340 participants) were included for reliability analyses. Between-session reliability as measured by coefficient of multiple correlations (CMC), and coefficient of variation (CV) was FL CMC: 0.89–0.96; CV: 8.3% and PA CMC: 0.87–0.90; CV: 4.5–9.6%. Within-session reliability was FL CMC: 0.82–0.99; CV: 0.0–6.7% and PA CMC: 0.91; CV: 0.0–15.0%. Manual analysis reliability was FL CMC: 0.89–0.96; CV: 0.0–15.9%; PA CMC: 0.84–0.90; and CV: 2.0–9.8%. Computational analysis FL CMC was 0.82–0.99, and PA CV was 14.0–15.0%. Eighteen computational approaches were identified, and these generally showed high agreement with manual analysis and high validity compared with phantoms or synthetic images. B-mode ultrasound is a reliable method to quantify fascicle architecture during movement. Additionally, computational approaches can provide a reliable and valid estimation of fascicle architecture.

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Age‐specific neuromuscular interaction during elderly habitual running

Abstract: These results imply that ELD cannot activate their muscles similar to YOUNG during running, and those different activities may modify the Lfa to utilize the tendon elasticity effectively.

Cited by 6 publications

References 45 publications

Mechanical properties and collagen fiber orientation of tendon in young and elderly

Mechanical properties and collagen fiber orientation of tendon in young and elderly

Effects of muscular endurance and tendon extensibility on endurance of joint stiffness

Ultrasound imaging to assess skeletal muscle architecture during movements: a systematic review of methods, reliability, and challenges

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