Background
\nThis study investigated relative contributions of ankle flexor torque, muscle size, and density on balance and falls.<\/p>\n
Methods
\nMen and women =50 years of age completed a peripheral quantitative computed tomography scan of the mid-leg to quantify muscle density (MD) and cross-sectional area; Biodex dynamometry to evaluate maximal isometric ankle flexor torque; and a single-leg balance test on a force platform with\/without eyes closed and cognitive task. Ankle flexor torque, muscle size, and density individually, together, or as interactions were examined for associations with balance (mean step duration, steps\/trial) in general linear models, or with falls in Poisson regression, adjusting for age, sex, BMI, glucocorticoid use, osteoarthritis, and physical activity. Visuo-cognitive conditions were compared.<\/p>\n
Results
\nAmong 105 participants (age: 63.3 \u00b1 9.9 years, BMI: 25.8 \u00b1 5.4 kg\/m2, 77.1% female), 41.8% experienced =1 fall in the last year. Balance on one leg was dependent on ankle flexor torque when eyes were open (r = -0.220 to -0.284) and on having leaner mid-leg muscles when eyes were closed (r = -0.123 to -0.142); cognitive challenge blunted these correlations. Individuals with leaner muscles tended to rely more on plantarflexors than dorsiflexors. A 2% lower step-free fraction in the eyes-closed paradigm associated with having 1 additional fall [-0.701(-1.235, -0.167)], but neither torque, muscle density, nor size related to number of falls.<\/p>\n
Conclusions
\nAmong ambulatory adults, ankle flexor torque and muscle density showed an interactive influence on balance that depended on visuo-cognitive input. The complementary roles of torque and muscle density on balance suggest redundancy is important under dual-tasking conditions.<\/p>\n","protected":false},"excerpt":{"rendered":"
Background This study investigated relative contributions of ankle flexor torque, muscle size, and density on balance and falls. Methods Men<\/p>\n","protected":false},"author":22,"parent":0,"menu_order":0,"template":"","format":"standard","meta":{"_acf_changed":false},"tags":[],"thema":[5924,5866],"produktgruppe":[5825],"literatur_kategorie":[7221],"class_list":["post-166618","literatur","type-literatur","status-publish","format-standard","hentry","thema-clinical-studies","thema-diagnostics-using-leonardo-pqct","produktgruppe-pqct-en","literatur_kategorie-clinical-studies"],"acf":[],"_links":{"self":[{"href":"https:\/\/stratec-med.com\/en\/wp-json\/wp\/v2\/literatur\/166618","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/stratec-med.com\/en\/wp-json\/wp\/v2\/literatur"}],"about":[{"href":"https:\/\/stratec-med.com\/en\/wp-json\/wp\/v2\/types\/literatur"}],"author":[{"embeddable":true,"href":"https:\/\/stratec-med.com\/en\/wp-json\/wp\/v2\/users\/22"}],"version-history":[{"count":0,"href":"https:\/\/stratec-med.com\/en\/wp-json\/wp\/v2\/literatur\/166618\/revisions"}],"wp:attachment":[{"href":"https:\/\/stratec-med.com\/en\/wp-json\/wp\/v2\/media?parent=166618"}],"wp:term":[{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/stratec-med.com\/en\/wp-json\/wp\/v2\/tags?post=166618"},{"taxonomy":"thema","embeddable":true,"href":"https:\/\/stratec-med.com\/en\/wp-json\/wp\/v2\/thema?post=166618"},{"taxonomy":"produktgruppe","embeddable":true,"href":"https:\/\/stratec-med.com\/en\/wp-json\/wp\/v2\/produktgruppe?post=166618"},{"taxonomy":"literatur_kategorie","embeddable":true,"href":"https:\/\/stratec-med.com\/en\/wp-json\/wp\/v2\/literatur_kategorie?post=166618"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}