Comparing Objective and Subjective Measures of Sleep Loss with Balance Performance in Farmers

2021 ◽  
Vol 27 (2) ◽  
pp. 69-76
Author(s):  
Devan Sedlacek ◽  
Matthew Beacom ◽  
Sabin R. Bista ◽  
Risto Rautiainen ◽  
Ka-Chun Siu
Keyword(s):  
Sleep Quality ◽  
Sleep Deprivation ◽  
Center Of Pressure ◽  
Objective Measures ◽  
Static Balance ◽  
List Type ◽  
Balance Performance ◽  
Subjective Measures ◽  
Previous Night ◽  
Total Displacement

HighlightsThe farming population is at risk of injury due to sleep deprivation.Loss of sleep during previous night affects balance performance in farmers.Objective measures of sleep are more reliable than subjective measures for predicting balance performance.Abstract. This study aimed to investigate the ability of both subjective and objective sleep measures to predict balance difficulty in agricultural workers. Seven male farmers from rural Nebraska were analyzed for static balance performance following a bout of sleep. Actiwatches were used to measure objective sleep hours and subjective questionnaires, including the Epworth Sleepiness Scale and the Pittsburgh Sleep Quality Index, were used to measure subjective hours of sleep and sleep quality. The participants were observed for 12 sessions, with six in planting season and six in harvest season. Static balance testing consisted of measuring the area, total displacement, and maximum range in the anteroposterior and mediolateral directions of the individual’s center of pressure with Tekscan pressure mats. Overall, it was found that objective measures had a higher correlation with the magnitude of balance deviations than subjective measures. Keywords: Actiwatch, Agricultural worker, Injury, Sleep deprivation.

Telerehabilitation-based trunk exercise training for motor symptoms of individuals with Parkinson’s disease: A randomized controlled clinical trial

2021 ◽  
pp. 1357633X2110217
Author(s):  
Liliane S de Vasconcellos ◽  
Raquel S Silva ◽  
Thaiana BF Pachêco ◽  
Danilo AP Nagem ◽  
Catarina de O Sousa ◽  
...  
Keyword(s):  
Parkinson’S Disease ◽  
Parkinson's Disease ◽  
Lower Limb ◽  
Center Of Pressure ◽  
Group Interaction ◽  
Exercise Program ◽  
Static Balance ◽  
Balance Performance ◽  
Randomized Controlled ◽  
Home Based

Background Poor gait and static balance performance may be associated with trunk muscles in individuals with Parkinson's disease. Aim The study aims at evaluating the effects of a home-based trunk exercise program on gait and balance performance in Parkinson's disease. Methods A randomized controlled trial was conducted with 28 individuals with Parkinson's disease with Hoehn & Yahr stage II–IV. The control group ( n = 14) performed upper and lower limb exercises, while the experimental group ( n = 14) engaged in a trunk exercise program. Both groups performed home-based exercises three times daily for 3 weeks. At the end of interventions (post-training) and 4 weeks after post-training (follow-up), static balance (force plate) and gait (motion capture system) were evaluated. Mixed analysis of variance compared time × group interaction ( α = 5%). Results No time × group interaction was observed in the center of pressure displacement, center of pressure mean velocity, and anteroposterior and mediolateral center of pressure range during bipedal support with eyes opened and closed; and gait speed, hip, knee, and ankle range of motion during gait analysis. No intragroup differences were found. Conclusion Trunk strengthening exercises did not improve gait and balance compared with upper and lower limb exercises. The non-adherence rate (33%) to the remote intervention may have also hindered our results.

scholarly journals The effects of leg preference and leg dominance on static and dynamic balance performance in highly-trained tennis players

PLoS ONE ◽  
2021 ◽  
Vol 16 (11) ◽  
pp. e0259854
Author(s):  
Žiga Kozinc ◽  
Nejc Šarabon
Keyword(s):  
Center Of Pressure ◽  
Dynamic Balance ◽  
Stability Index ◽  
Static Balance ◽  
Balance Performance ◽  
Tennis Players ◽  
Balance Task ◽  
Time To Stabilization ◽  
Leg Dominance ◽  
Anterior Posterior

In this study, 90 (51 males, 39 females) tennis players performed single-leg quiet stance and single-leg landing tasks. For the static standing task, center-of pressure (CoP) velocities, amplitudes, frequency and area were calculated. For the landing tasks, time to stabilization as well as dynamic postural stability index were considered. The analysis of differences between the legs was done based on two methods for a priori determination of leg preference, one based on the preference of kicking a ball and one based on the preference for single-leg jumping. An additional analysis was done based on the leg dominance (determined post hoc), based on the observed performance of the tasks. In case of the classification based on kicking a ball, there was a statistically significantly lower CoP anterior-posterior velocity and anterior-posterior amplitude in static balance task (p ≤ 0.017; 0.17 ≤ d ≤ 0.28) for the preferred leg. The CoP frequency was higher in the preferred leg for both directions (p ≤ 0.002; 0.10 ≤ d ≤ 0.22). For the landing task, CoP medial-lateral time to stabilization was statistically significantly shorter for the preferred leg (0.28 ± 0.38 s) compared to the non-preferred leg (0.47 ± 0.60 s) (p = 0.012; d = 0.38). There were no differences between the legs for the landing task. Moreover, there were no differences between the legs when we used the preference based on jumping for either of the tasks (d ≤ 0.14). The differences between legs in terms of observed dominance were larger than the differences based on the preference, which stresses the need for clear distinction of limb preference and limb dominance in research and practice. Regarding the effect of leg preference, small differences in static balance may exist between the legs (when the preference is based on kicking a ball).

scholarly journals Effects of white Gaussian noise on dynamic balance in healthy young adults

2021 ◽  
Vol 11 (1) ◽  
Author(s):  
Ziyou Zhou ◽  
Can Wu ◽  
Zhen Hu ◽  
Yujuan Chai ◽  
Kai Chen ◽  
...  
Keyword(s):  
Young Adults ◽  
Gaussian Noise ◽  
Center Of Pressure ◽  
Dynamic Balance ◽  
White Gaussian Noise ◽  
Fluctuation Analysis ◽  
Balance Performance ◽  
Short Term ◽  
Crossover Point ◽  
Short Time

AbstractIt has been known that short-time auditory stimulation can contribute to the improvement of the balancing ability of the human body. The present study aims to explore the effects of white Gaussian noise (WGN) of different intensities and frequencies on dynamic balance performance in healthy young adults. A total of 20 healthy young participants were asked to stand at a dynamic balance force platform, which swung along the x-axis with an amplitude of ± 4° and frequency of 1 Hz. Their center of pressure (COP) trajectories were recorded when they were stimulated by WGN of different intensities (block 1) and different frequencies (block 2). A traditional method and detrended fluctuation analysis (DFA) were used for data preprocessing. The authors found that only with 75–85 dB WGN, the COP parameters improved. WGN frequency did not affect the dynamic balance performance of all the participants. The DFA results indicated stimulation with 75 dB WGN enhanced the short-term index and reduced the crossover point. Stimulation with 500 Hz and 2500 Hz WGN significantly enhanced the short-term index. These results suggest that 75 dB WGN and 500 Hz and 2500 Hz WGN improved the participants’ dynamic balance performance. The results of this study indicate that a certain intensity of WGN is indispensable to achieve a remarkable improvement in dynamic balance. The DFA results suggest that WGN only affected the short-term persistence, indicating the potential of WGN being considered as an adjuvant therapy in low-speed rehabilitation training.

The Effect of a Single Dose of Quazepam (Sch-16134) on the Sleep of Chronic Insomniacs

1979 ◽  
Vol 7 (6) ◽  
pp. 583-587 ◽  
Author(s):  
Thomas Roth ◽  
Elizabeth I Tietz ◽  
Milton Kramer ◽  
Mark Kaffeman
Keyword(s):  
Single Dose ◽  
Side Effects ◽  
Chronic Administration ◽  
Sleep Efficiency ◽  
Objective Measures ◽  
Subjective Measures ◽  
Sleep Maintenance ◽  
Eeg Changes ◽  
Different Doses ◽  
Polysomnographic Recording

The present study evaluated the efficacy of 25 mg of quazepam, a new benzodiazepine hypnotic, in a population of chronic insomniacs. The results indicate that a single dose (25 mg) administered for one night was efficacious when measured both objectively by polysomnographic recording and subjectively by questionnaire with no reported side-effects. The change in the objective measures paralleled the direction of change in subjective measures. Sleep efficiency and sleep maintenance were improved without EEG changes in Stages 2, 3-4, and REM. Further study is needed to evaluate the effects of chronic administration of different doses of quazepam in chronic insomniacs.

Associations between subjective and objective measures of sleep quality and hemoglobin a1c in professional athletes

2019 ◽  
Vol 64 ◽  
pp. S239-S240
Author(s):  
R. Maijer ◽  
A. Thornton ◽  
J. Lauffenburger ◽  
J. Marino ◽  
M. Tsai ◽  
...  
Keyword(s):  
Sleep Quality ◽  
Hemoglobin A1c ◽  
Professional Athletes ◽  
Objective Measures

scholarly journals Concussion History and Balance Performance in Adolescent Rugby Union Players

2021 ◽  
pp. 036354652199870
Author(s):  
Mark Matthews ◽  
William Johnston ◽  
Chris M. Bleakley ◽  
Richard J. Davies ◽  
Alan T. Rankin ◽  
...  
Keyword(s):  
Dual Task ◽  
Inertial Sensor ◽  
Dynamic Balance ◽  
Rugby Union ◽  
Static Balance ◽  
Balance Performance ◽  
Eyes Closed ◽  
History Of ◽  
Concussion History ◽  
Rugby Players

Background: Sports-related concussion is a worldwide problem. There is a concern that an initial concussion can cause prolonged subclinical disturbances to sensorimotor function that increase the risk of subsequent injury. The primary aim of this study was to examine whether a history of sports-related concussion has effects on static and dynamic balance performance in adolescent rugby players. Hypothesis: Dynamic balance would be worse in players with a history of concussion compared with those with no history of concussion. Study Design: Cross-sectional study; Level of evidence, 3. Methods: Male adolescent rugby players aged 14 to 18 years from 5 schools were recruited before the start of the 2018-2019 playing season. Participants completed questionnaires and physical tests, including dynamic Y balance and single-leg static balance (eyes closed) tests, while performing single and dual tasks. Dynamic balance was assessed using inertial sensor instrumentation. Dependent variables were normalized reach distance and the sample entropy (SEn) of the 3 axes ( x, y, and z). Results: Of the 195 participants, 100 reported a history of concussion. Those with a history of concussion demonstrated higher SEn in all directions, with highest values during anterior (standardized mean difference [SMD], 0.4; 95% CI, 0.0-0.7; P = .027) and posteromedial (SMD, 0.5; 95% CI, 0.2-0.9; P = .004) reach directions compared with those with no history. There was no difference between groups (concussion history vs control) in traditional Y balance reach distances in the anterior or posteromedial directions or single-leg static balance during both single- ( P = .47) and dual-task ( P = .67) conditions. Conclusion: Adolescent rugby union athletes with a history of concussion had poorer dynamic balance during performance tasks compared with healthy controls. Static single-leg balance tests, either single or dual task, may not be sensitive enough to detect sensorimotor deficits in those with a history of concussion.

scholarly journals The effect of age on postural and cognitive task performance while using vibrotactile feedback

2015 ◽  
Vol 113 (7) ◽  
pp. 2127-2136 ◽  
Author(s):  
Chia-Cheng Lin ◽  
Susan L. Whitney ◽  
Patrick J. Loughlin ◽  
Joseph M. Furman ◽  
Mark S. Redfern ◽  
...  
Keyword(s):  
Older Adults ◽  
Cognitive Performance ◽  
Center Of Pressure ◽  
Cognitive Task ◽  
Balance Performance ◽  
Vibrotactile Feedback ◽  
Younger Adults ◽  
Age Related ◽  
Trunk Tilt ◽  
Effect Of Age

Vibrotactile feedback (VTF) has been shown to improve balance performance in healthy people and people with vestibular disorders in a single-task experimental condition. It is unclear how age-related changes in balance affect the ability to use VTF and if there are different attentional requirements for old and young adults when using VTF. Twenty younger and 20 older subjects participated in this two-visit study to examine the effect of age, VTF, sensory condition, cognitive task, duration of time, and visit on postural and cognitive performance. Postural performance outcome measures included root mean square of center of pressure (COP) and trunk tilt, and cognitive performance was assessed using the reaction time (RT) from an auditory choice RT task. The results showed that compared with younger adults, older adults had an increase in COP in fixed platform conditions when using VTF, although they were able to reduce COP during sway-referenced platform conditions. Older adults also did not benefit fully from using VTF in their first session. The RTs for the secondary cognitive tasks increased significantly while using the VTF in both younger and older adults. Older adults had a larger increase compared with younger adults, suggesting that greater attentional demands were required in older adults when using VTF information. Future training protocols for VTF should take into consideration the effect of aging.

Semantic ambiguity norms for 530 Spanish words

2016 ◽  
Vol 38 (2) ◽  
pp. 457-475 ◽  
Author(s):  
JUAN HARO ◽  
PILAR FERRÉ ◽  
ROGER BOADA ◽  
JOSEP DEMESTRE
Keyword(s):  
Language Processing ◽  
Ambiguous Word ◽  
Age Of Acquisition ◽  
Emotional Valence ◽  
Objective Measures ◽  
Semantic Ambiguity ◽  
Subjective Ratings ◽  
Subjective Measures ◽  
Word Meanings ◽  
Ambiguous Words

ABSTRACTThis study presents semantic ambiguity norms for 530 Spanish words. Two subjective measures of semantic ambiguity and two subjective measures of relatedness of ambiguous word meanings were collected. In addition, two objective measures of semantic ambiguity were included. Furthermore, subjective ratings were obtained for some relevant lexicosemantic variables, such as concreteness, familiarity, emotional valence, arousal, and age of acquisition. In sum, the database overcomes some of the limitations of the published databases of Spanish ambiguous words; in particular, the scarcity of measures of ambiguity, the lack of relatedness of ambiguous word meanings measures, and the absence of a set of unambiguous words. Thus, it will be very helpful for researchers interested in exploring semantic ambiguity as well as for those using semantic ambiguous words to study language processing in clinical populations.

scholarly journals 1059 Sleep Parameters In People With Type 2 Diabetes With And Without Insomnia Symptoms

SLEEP ◽  
2020 ◽  
Vol 43 (Supplement_1) ◽  
pp. A402-A403
Author(s):  
M Alshehri ◽  
A Alkathiry ◽  
A Alenazi ◽  
S Alothman ◽  
J Rucker ◽  
...  
Keyword(s):  
Type 2 Diabetes ◽  
Total Sleep Time ◽  
Sleep Onset ◽  
Sleep Time ◽  
Circular Data ◽  
Objective Measures ◽  
Subjective Measures ◽  
Sleep Parameters ◽  
Insomnia Symptoms

Abstract Introduction There is an increasing awareness of the high prevalence of insomnia symptoms in people with type 2 diabetes (T2D). Past studies have demonstrated the importance of measuring sleep parameters in both averages and variabilities using subjective and objective methods. Thus, we aimed to compare the averages and variability of sleep parameters in people with T2D with and without insomnia symptoms. Methods Actigraph measurements and sleep diaries were used in 59 participants to assess sleep parameters, including sleep efficiency (SE), sleep latency, total sleep time, and wake after sleep onset over seven nights. Validated instruments were used to assess the symptoms of depression, anxiety, and pain. Circular data were used to describe the distribution of bed distribution with SE as a magnitude for both groups. Mann Whitney U test was utilized to compare averages and variability of sleep parameters between the two groups. Multivariable general linear model to control for demographic and clinical variables. For the secondary aim, multiple linear regression tests were utilized to assess the association between averages and variability values for both groups. Results SE was found to be lower in average and higher in variability for participants with T2D and insomnia symptoms, than those with T2D only subjectively and objectively. SE variability was also the only sleep parameter higher in people with T2D and insomnia symptoms, with psychological symptoms potentially playing a role in this difference. We observed that people in T2D+Insomnia tend to go to bed earlier compared to the T2D only group based on objective measures, but no difference was observed between groups in subjective measures. The only significant relationship in both objective and subjective measures was between the averages and variability of SE. Conclusion Our findings suggest a discrepancy between subjective and objective measures in only average of total sleep time, as well as agreement in measures of variability in sleep parameters. Also, the relationship between averages and variabilities suggested the importance of improving SE to minimize its variability. Further research is warranted to investigate the complex relationship between sleep parameters and psychological factors in people with T2D and insomnia symptoms. Support None

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