ELIZA

return kwic search for activity out of >500 occurrences
475194 occurrences (No.33 in the rank) during 5 years in the PubMed. [cache]

17) These results demonstrate the existence of substantial BSV bone, and that it is partly driven by WSV, and likely also by physical activity and dietary habits prior to bed rest.

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PMID:35273514 DOI:10.3389/fphys.2021.743876

2021 Frontiers in physiology

* Between-Subject and Within-Subject Variaton of Muscle Atrophy and Bone Loss in Response to Experimental Bed Rest.

- To improve quantification of individual responses to bed rest interventions, we analyzed peripheral quantitative computer tomography (pQCT) datasets of the lower leg of 76 participants, who took part in eight different bed rest studies. A newly developed statistical approach differentiated measurement uncertainty U _Meas from between-subject-variation (BSV) and within-subject variation (WSV). The results showed that U _Meas decreased 59.3-80% over the two decades of bed rest studies (p < 0.01), and that it was higher for muscles than for bones. The reduction of U _Meas could be explained by improved measurement procedures as well as a higher standardization. The vast majority (89.6%) of the individual responses pc _i exceeded the 95% confidence interval defined by U _Meas , indicating significant and substantial BSV, which was greater for bones than for muscles, especially at the epiphyseal measurement sites. Non-significant to small positive inter-site correlations between bone sites, but very large positive inter-site correlation between muscle sites suggests that substantial WSV exists in the tibia bone, but much less so in the calf musculature. Furthermore, endocortical circumference, an indicator of the individual's bone geometry could partly explain WSV and BSV. These results demonstrate the existence of substantial BSV bone, and that it is partly driven by WSV, and likely also by physical activity and dietary habits prior to bed rest. In addition, genetic and epigenetic variation could potentially explain BSV, but not WSV. As to the latter, differences of bone characteristics and the bone resorption process could offer an explanation for its existence. The study has also demonstrated the importance of duplicate baseline measurements. Finally, we provide here a rationale for worst case scenarios with partly effective countermeasures in long-term space missions.

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(1)69 and	(13)5 are	(25)3 interventions	(37)2 effect;
(2)46 of	(14)5 or	(26)3 limitations	(38)2 for
(3)45 in	(15)5 relationship	(27)3 models	(39)2 has
(4)44 null	(16)5 with	(28)3 opportunities	(40)2 increased
(5)14 was	(17)4 and/or	(29)3 programs	(41)2 levels
(6)13 against	(18)4 at	(30)3 sedentary	(42)2 levels,
(7)12 (PA)	(19)4 may	(31)3 that	(43)2 plays
(8)10 is	(20)3 (PA),	(32)3 through	(44)2 programmes
(9)7 as	(21)3 advice	(33)2 appears	(45)2 using
(10)6 by	(22)3 but	(34)2 assessment
(11)6 during	(23)3 changes	(35)2 counselling
(12)6 on	(24)3 compared	(36)2 differentiation

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--- WordNet output for activity --- =>活動, 活躍, 働き, 動き, 活気 Overview of noun activity The noun activity has 6 senses (first 3 from tagged texts) 1. (43) activity -- (any specific behavior; "they avoided all recreational activity") 2. (36) action, activity, activeness -- (the state of being active; "his sphere of activity"; "he is out of action") 3. (13) bodily process, body process, bodily function, activity -- (an organic process that takes place in the body; "respiratory activity") 4. activity -- ((chemistry) the capacity of a substance to take part in a chemical reaction; "catalytic activity") 5. natural process, natural action, action, activity -- (a process existing in or produced by nature (rather than by the intent of human beings); "the action of natural forces"; "volcanic activity") 6. activeness, activity -- (the trait of being active; moving or acting rapidly and energetically; "the level of activity declines with age") --- WordNet end ---