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Original Research

IJHRS. 2017; 6(3): 130-142


Influence of Circadian Rhythm on Balance In Healthy Subjects

Yasser Ramzy Lasheen, Rehab Abdel Hamed Abou Elfotoh, Maher Ahmed El Kebalawy.




Abstract

Background: Circadian rhythm play an important role in our biophysiological functions, also affect the human performance and effective movements, but little researches had been conducted on the body type in relation to the influence of time of day on motor ability such as body balance.
Objectives: The purpose of this study was to investigate the influence of circadian rhythm on dynamic balance.
Materials and methods: Forty healthy male physical therapists with mean age 24.15_+3.32 years, mean weight 69.25+-6.67 kilogram (kg), mean height 176.5+-7.66 centimeters (cm), and mean BMI 22.16+-1.4 kg/m2. Subject's personality type was determined by morningness/eveningness scale and then assigned to two equal groups. Subject's dynamic balance was measured by the biodex balance system on the morning (8 am) and on the evening (2 pm) for both groups, post hoc tests were done to determine the significant difference in the dynamic balance at different times, also the difference between the morning and evening tested groups
Results: The result revealed that there was statistical significant difference in dynamic balance (Overall stability, anterior /posterior stability and medial /lateral stability) at different times of day according to subject's personality type. But, there was no statistical significant difference between both groups except for medio-lateral stability which decrease in the evening group at morning test.
Conclusion: The finding revealed that circadian rhythm had significant statistical effect on dynamic balance throughout different times.

Key words: Circadian rhythm, Human balance, Biodex balance system.






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