Evidence map›Paper›PMID 34133465›Full record

ArticlePloS one2021

Decreased continuous sitting time increases heart rate variability in patients with cardiovascular risk factors.

Natsuki Nakayama, Masahiko Miyachi, Koji Tamakoshi, Toshio Hayashi, Koji Negi, Koji Watanabe, Makoto Hirai

Open access · goldAbstract read
In one paragraph

Article in PloS one, 2021. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 3 papers.

0numbers the graph read from it
0cells of the map it votes in
3citing papers in PubMed
0.2field-weighted citation impact, top 49% of its field
1 · What the graph read from it

What it found

Each row is one number read from the abstract, on the scale the paper reported it, with its interval. Left of the dashed line favours the treatment, right favours the comparator. Under each row is the sentence it came from. New to these charts? A ten-minute tutorial.

The abstract states no effect estimate the extractor could read, or names no intervention and outcome on the map, so this paper lights no cell and moves no belief. It is still indexed, cited and linked below.

2 · The registry

The trial behind it

Trials whose registry record cites this paper, or whose number appears in the abstract. A trial that started after this paper was published is citing it as background, not reporting it.

Neither the registry nor the abstract names a trial number. If this is a trial report, that itself is worth knowing.

3 · Its place in the literature

Who cites it

3 citing papers in PubMed, 5 citations in OpenAlex.

  1. Trial
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4 · The record

Corrections and comments

PubMed lists nothing against this paper. Absence here is not a guarantee, only a check that was made.

5 · Who and what money

Authors and funding

7 authors at 2 institutions in 1 country.

Natsuki NakayamaNagoya University Graduate School of Medicine, Higashi-ku, Nagoya, Japan.ORCID 0000-0001-9487-6676
Masahiko MiyachiChutoen General Medical Center, Kakegawa, Shizuoka, Japan.
Koji TamakoshiNagoya University Graduate School of Medicine, Higashi-ku, Nagoya, Japan.
Toshio HayashiNagoya University Graduate School of Medicine, Higashi-ku, Nagoya, Japan.
Koji NegiNegi Clinic, Inazawa, Aichi, Japan.
Koji WatanabeWatanabe Medical Clinic, Taketoyo, Chita, Aichi, Japan.
Makoto HiraiNagoya University Graduate School of Medicine, Higashi-ku, Nagoya, Japan.
Nagoya University · JPSakurabashi Watanabe Hospital · JP

Funding

No grant is acknowledged in the PubMed record.

6 · The paper itself

Abstract

aimThe purpose of the present study was to elucidate the relationship between high-frequency heart rate variability (HF HRV) and continuous daytime sitting time in patients with cardiovascular risk factors such as mild hypertension and/or stable angina pectoris.

backgroundDecreased HF HRV precedes the progression and worsening of cardiovascular diseases. Continuous sitting behavior is a major risk factor for developing metabolic syndrome and is associated with cardiovascular disease, diabetes mellitus, renal failure, sarcopenia and osteoporosis. Risk factors for cardiovascular disease can be affected by continuous daytime sitting behaviors.

designThe present study design was a post-hoc comparison.

methodsPatients treated at two different primary care clinics from 2014 to 2018 were enrolled in this study (n = 53). We assessed HF HRV and continuous sitting time using 24-hour Holter electrocardiography and an activity meter at baseline and 6 months. HF HRV was calculated during sleep.

resultsSitting time had decreased in 22 patients (decreased group) and increased in 31 patients (increased group) after 6 months. The mean patient ages were 73.1 and 72.0 years in the decreased and increased sitting time groups, respectively (p = 0.503). HF HRV during sleep had increased after 6 months in the decreased sitting time group. Compared with the increased group, the decreased group showed significantly higher HF HRV during sleep after 6 months by two-way repeated-measures ANOVA after adjustment for age, sex and change in activity (p = 0.045).

conclusionThese results suggest that a decrease in sitting time might induce parasympathetic activity during sleep. Therefore, reducing continuous sitting time during the day might contribute, in part, to improving the prognosis of patients with cardiovascular risk factors not only by avoiding muscle loss but also by providing positive influences on parasympathetic tone during sleep.

Indexed as

Heart Disease Risk FactorsSedentary BehaviorAgedAge FactorsAngina, StableElectrocardiography, AmbulatoryExerciseFemaleHeart RateHumansHypertensionMaleSex FactorsTime Factors

Identifiers

PMID34133465
PMCPMC8208552
OpenAlexW3172470069

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LicenceCC BY
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Registered trials

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Read under generation 80e0d062 · epoch 390. Bibliography from PubMed, PubMed Central and OpenAlex; grants from NIH RePORTER; trial links from ClinicalTrials.gov; estimates, votes and beliefs from the OpenQuestion graph.