Open AccessCoordination between heart rate variability and physical activity may be diminished by fatigability in non‐older women in the hour before sleep
Author(s) -
Taniguchi Kentaro,
Shimouchi Akito,
Jinno Naoya,
Seiyama Akitoshi
Publication year - 2021
Publication title -
physiological reports
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.918
H-Index - 39
ISSN - 2051-817X
DOI - 10.14814/phy2.15126
Subject(s) - morning , medicine , autonomic nervous system , physical activity , sleep (system call) , heart rate , sleep loss , heart rate variability , physical therapy , circadian rhythm , psychology , sleep deprivation , blood pressure , computer science , operating system
Abstract Fatigability is related to several diseases as well as the autonomic nervous system. We investigated whether fatigability is associated with coordination between physical acceleration (PA) and parasympathetic nervous activity (PSNA) in women. Overall, 95 women were divided into non‐old ( n = 50; age: 22–59 years) and old ( n = 45; age: ≥60 years) groups. PSNA and PA data were simultaneously obtained every minute for 24 h. We defined %lag0 as the percent ratio of lag = 0 min between PSNA and PA in 1 h. Cornell Medical Index was used to determine the degrees of physical and psychological symptoms. In the non‐older group in the hour before sleep, the participants with high fatigability scores had significantly lower %lag0 than those with low fatigability ( p < 0.05). Additionally, those with higher fatigability combined with exhaustion in the morning had significantly lower %lag0 than those without exhaustion in the hour before sleep ( p < 0.05) but not in the hour after waking up. These results suggest that fatigability in non‐older women was associated with loss of coordination between PSNA and PA in the hour before sleep. Additionally, exhaustion in the morning may be related to loss coordination of PSNA and PA during the previous night.