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• W3180670823 endingPage "111469" @default.
• W3180670823 startingPage "111469" @default.
• W3180670823 abstract "Motor neuron degeneration, denervation, neuromuscular junction (NMJ) fragmentation and loss of motor units (MUs), play a key-role in the development of sarcopenia. The aim of the present study was to investigate the beneficial effects of regular practice of dancing in physically active elders on concentration of C-terminal Agrin fragment (CAF), a marker of NMJ instability, muscle mass, strength, and physical performance in a group of 16 recreationally active older dancers (AOD; 70.1 ± 3.4 yr) compared to 15 age-matched sedentary peers (OS; 70.9 ± 6.2 yr). Circulating concentration of CAF was measured in serum, while morphology of the vastus lateralis and multifidus muscles was assessed by ultrasound imaging. In addition, the participants underwent two functional performance tests, the Timed Up and Go (TUG) and the 10-meter walk test (10-MWT), a lower and upper limb isometric strength test, a static and a dynamic balance test. Although no statistically significant differences were detected for both muscle morphology and isometric strength, higher CAF concentration (20%, p < 0.01) was found in OS. AOD showed a better performance in TUG (22%, p < 0.001), 10-MWT (17%, p < 0.001) and dynamic balance (25%, p < 0.01) than OS. Notably, CAF concentration correlated with dynamic balance performance (r = 0.3711, p < 0.05). Our results provide evidence that the regular practice of dancing in older age, together with non-structured light aerobic physical activities, is associated to lower CAF concentration and improved walking and balance performance. Our findings also suggest that NMJ instability, as indicated by elevated CAF serum concentration, seems to precede the loss of muscle size and alterations in muscle architecture normally associated with sarcopenia." @default.
• W3180670823 created "2021-07-19" @default.
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• W3180670823 date "2021-10-01" @default.
• W3180670823 modified "2023-10-16" @default.
• W3180670823 title "Active older dancers have lower C-terminal Agrin fragment concentration, better balance and gait performance than sedentary peers" @default.
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• W3180670823 doi "https://doi.org/10.1016/j.exger.2021.111469" @default.
• W3180670823 hasPubMedId "https://pubmed.ncbi.nlm.nih.gov/34246731" @default.
• W3180670823 hasPublicationYear "2021" @default.
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