Effect of time of day on height loss response variability in asymptomatic participants on two consecutive days

Saiklang, Pongsatorn; Puntumetakul, Rungthip; Neubert, Manida Swangnetr; Boucaut, Rose

doi:10.1080/00140139.2019.1663941

Cited by 8 publications

(26 citation statements)

References 39 publications

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“…However, the correlation was quite small. Diurnal height changes might act as a strong confounding factor of the influence hemoglobin has on continuous values of height loss per year [ 36 ].…”

Section: Discussionmentioning

confidence: 99%

Hemoglobin and adult height loss among Japanese workers: A retrospective study

et al. 2021

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Height loss starting in middle age is reported to be associated with increased all-cause and cardiovascular mortality later in life. However, the mechanisms underlying this association are unclear. Hypoxia and oxidative stress, which are known causes of cardiovascular disease, could be reduced by hemoglobin. Therefore, hemoglobin could be inversely associated with height loss. However, high body mass index (BMI) is a known risk factor for intervertebral disc disorder, a known cause of height loss in adults. High BMI might confound the association between hemoglobin and height loss. Therefore, we performed analyses stratified by BMI status. To clarify the association between hemoglobin and height loss, we conducted a retrospective study of Japanese workers (6,471 men and 3,180 women) aged 40–74 years. Height loss was defined as being in the highest quintile of height decrease per year. In men overall and men with BMI <25 kg/m2, hemoglobin was significantly inversely associated with height loss; but no association was observed for men with high BMI (BMI ≥25 kg/m2) and for women. For men, after adjusting for known cardiovascular risk factors, adjusted odds ratios (ORs) and 95% confidence intervals (CIs) for height loss with each 1 standard deviation (SD) increase in hemoglobin (1.0 g/dL for men and 0.8g/dL for women) were 0.89 (0.83, 0.95) for men overall, 0.82 (0.75, 0.89) for men who do not have high BMI, and 1.01 (0.92, 1.12) for men with high BMI. For women, the corresponding values were 0.97 (0.89, 1.06), 0.98 (0.89, 1.09), and 0.93 (0.75, 1.15) respectively. Hemoglobin is significantly inversely associated with height loss in men who do not have high BMI, but not in men with high BMI or women. These results help clarify the mechanisms underlying height loss, which has been reported to be associated with a higher risk of mortality in adults.

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Section: Discussionmentioning

confidence: 99%

Hemoglobin and adult height loss among Japanese workers: A retrospective study

et al. 2021

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“…Therefore, many researchers have studied the effects of time of day on changes in stature change after normal daily activities [22,23,[28][29][30][31][32]. No statistically significant difference between stature loss from load activity in the morning and in the afternoon for healthy participants was reported in some previous studies [29][30][31][32]. This lack of significant difference was also reported in a study with chronic low back pain participants [23].…”

Section: Introductionmentioning

confidence: 92%

“…The rate of stature change is significantly greater when an individual rises in the morning, and gradually slows throughout the day [18]. Therefore, many researchers have studied the effects of time of day on changes in stature change after normal daily activities [22,23,[28][29][30][31][32]. No statistically significant difference between stature loss from load activity in the morning and in the afternoon for healthy participants was reported in some previous studies [29][30][31][32].…”

Section: Introductionmentioning

confidence: 98%

Effect of Time of Day on the Magnitude of Stature Change Response Variability in Participants with Chronic Low Back Pain on Consecutive 2 Days

et al. 2021

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Measurements of stature change have been used to compare spinal loading in the sitting posture. However, it is difficult to interpret whether the stature change response recorded is truly due to an intervention or to the natural fluctuation of stature change response between the days. The aim of this study was to investigate the effect of time of day (morning and afternoon) on the variability of stature change in participants with chronic low back pain (CLBP) on 2 consecutive days. Forty-four participants with CLBP attended 2 sessions (morning and afternoon) of stature change testing on 4 separate days. A stature change response of more than 0.985 mm in the morning and 1.149 mm in the afternoon on 2 consecutive days indicates that an intervention itself has influenced stature change measurement in CLBP participants. The magnitude of stature change response on different days and times of day established specific levels of natural variation meaning changes above these levels can be attributed to intervention effects in participants with CLBP. HIGHLIGHTS The findings suggest that it is important to control the time at which stature change investigations are conducted Seated stadiometry measurement, changes above 0.985 mm (morning) and 1.149 mm (afternoon) can be attributed to intervention effects between consecutive 2 days The results of the current study presented no significant difference in magnitude of stature change response in the morning versus the afternoon in chronic low back pain participants GRAPHICAL ABSTRACT

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“…543, Mitutoyo, Kawasaki, Japan). This device is used to identify variations in stature change; in laboratory tests, it has been shown to have a resolution of ±.006 millimeter (mm), but when applied in human trials, measurements to the nearest mm are recorded (Saiklang et al, 2019). The digimetic indicator was mounted in a rigid but adjustable structure that was positioned at the top of the stadiometer.…”

Section: Participantsmentioning

confidence: 99%

“…The rhythm of the conditioning cycle was controlled by video feedback. Figure 3 here Experiment On the second and third days, all participants were required to attend at the same time of day between 8 and 10 am (Healey et al, 2008;Saiklang et al, 2019) within an hour of the participant waking. They were requested to sleep at least 8 hr each night before the experimental days (Healey et al, 2011).…”

Section: Conditionsmentioning

confidence: 99%

An Evaluation of an Innovative Exercise to Relieve Chronic Low Back Pain in Sedentary Workers

et al. 2020

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Objective The purpose of the study was to examine the effectiveness of a novel supported dynamic lumbar extension with the abdominal drawing-in maneuver (ADIM) technique on stature change, deep abdominal muscle activity, trunk muscle fatigue, and pain intensity during prolonged sitting in chronic low back pain (CLBP) participants. Background Prolonged sitting can cause trunk muscle fatigue from continuous contraction of deep trunk muscles in seated postures. Deficiency of activity of deep muscles can reduce muscular support of the spine, causing stress on spinal structures, which could result in pain. Method Thirty participants with CLBP were randomly allocated: (a) control—sitting without exercise, and (b) intervention—supported dynamic lumbar extension with the ADIM technique. Results Compared to the intervention condition, the control condition demonstrated significantly greater deterioration in stature change, increased levels of deep trunk muscle fatigue, and an increase in pain during prolonged sitting. Conclusion The supported dynamic lumbar extension with the ADIM technique appears to provide a protective effect on detrimental stature change and deep trunk muscle fatigue. In addition, it prevented an increase in pain intensity during prolonged sitting in people with CLBP. Application Sedentary behavior harms health, particularly affecting the lower back. Clinicians can use the intervention to induce dynamic lumbar movement, and this exercise can maintain deep trunk muscle activity during prolonged sitting, thereby helping to prevent low back pain (LBP) problems.

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Effect of time of day on height loss response variability in asymptomatic participants on two consecutive days

Cited by 8 publications

References 39 publications

Hemoglobin and adult height loss among Japanese workers: A retrospective study

Hemoglobin and adult height loss among Japanese workers: A retrospective study

Effect of Time of Day on the Magnitude of Stature Change Response Variability in Participants with Chronic Low Back Pain on Consecutive 2 Days

An Evaluation of an Innovative Exercise to Relieve Chronic Low Back Pain in Sedentary Workers

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