International Journal of Biometeorology

, Volume 57, Issue 5, pp 769–774 | Cite as

A study on the physical fitness index, heart rate and blood pressure in different phases of lunar month on male human subjects

Original Paper

Abstract

The gravitational pull of the moon on the earth is not the same in all phases of the lunar month, i.e. new moon (NM), first quarter (FQ), full moon (FM) and third quarter (TQ), and as a result the amplitude of tide differs in different phases. The gravitational pull of the moon may have effects on the fluid compartments of the human body and hence the cardiovascular system may be affected differentially in the different phases of the lunar month. In the present study resting heart rate (HR) and blood pressure (BP), physical fitness index (PFI), peak HR and BP immediately after step test, and recovery HR and BP after step test were measured during different phases of the lunar month in 76 male university students (age 23.7 ± 1.7 years). At rest, both systolic and mean arterial BP were ∼5 mmHg lower in NM and FM compared to FQ and TQ, but resting HR was not significantly different between phases. Further, peak HR and peak systolic BP after step test were lower (∼4 beat/min and ∼5 mmHg, respectively) in NM and FM compared to FQ and TQ. PFI was also higher (∼5) in NM and FM compared to FQ and TQ. Recovery of HR after step test was quicker in NM and FM compared to that of FQ and TQ. It appears from this study that gravitational pull of the moon may affect the cardiovascular functions of the human body. Moreover, the physical efficiency of humans is increased in NM and FM due to these altered cardiovascular regulations.

Keywords

Lunar month Gravitational pull Physical fitness index Cardiovascular function 

Notes

Acknowledgements

As part of the study was carried out in the Department of Human Physiology, Vidyasagar University, the authors would like to acknowledge this Department for use of its facilities.

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Copyright information

© ISB 2012

Authors and Affiliations

  1. 1.Department of Human Physiology with Community HealthVidyasagar UniversityPaschim MedinipurIndia
  2. 2.Department of PhysiologyUniversity College of Science and Technology, University of CalcuttaKolkataIndia

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