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


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.


Lunar month Gravitational pull Physical fitness index Cardiovascular function 



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.


  1. Bevegard S, Holmgren A, Jonsson B (1960) The effect of body position on the circulation at rest and during exercise, with special reference to the influence on the stroke volume. Acta Physiol Scand 49:279–298CrossRefGoogle Scholar
  2. Biermann T, Estel D, Sperling W, Bleich S, Kornhuber J, Reulbach U (2005) Influence of lunar phases on suicide: the end of a myth? A population-based study. Chronobiol Int 22:1137–1143CrossRefGoogle Scholar
  3. Biopac Student Lab PRO Manual (2005) BIOPAC system, Inc. Aero Camino, Goleta, CAGoogle Scholar
  4. Birch K, McLaren D, George K (2005) Instant notes: sports and exercise physiology, 1st edn. Garland Science/BIOS Scientific, UK, pp 75–94Google Scholar
  5. Brouha L, Graybiel A, Health CW (1943) Step test: simple method of measuring physical fitness for hard muscular work in adult man. Rev Can Biol 2:86Google Scholar
  6. Chakraborty U, Ghosh TK (2012) Autonomic neural activity in male human subjects during different phases of synodic period of moon. Biol Rhythm Res. doi: 10.1080/09291016.2012.692257. Accessed 07 November 2012
  7. Cutler WB, Schleidt WM, Friedmann E, Preti G, Stine R (1987) Lunar influences on the reproductive cycle in women. Hum Biol 59(6):959–972Google Scholar
  8. Dunne FP, Barry DG, Ferriss JB, Grealy G, Murphy D (1991) Changes in blood pressure during the normal menstrual cycle. Clin Sci (Lond) 81:515–518Google Scholar
  9. Ewing DJ (1978) Cardiovascular reflexes and autonomic neuropathy. Clin Sci Mol Med 55:321–327Google Scholar
  10. Fahim M (2003) Cardiovascular sensory receptors and their regulatory mechanisms. Ind J Physiol Pharmacol 47(2):124–146Google Scholar
  11. Fox EL, Billings CE, Bartels RL, Bason R, Mathews D (1973) Fitness standards for male college students. Int Z Angew Physiol 31:231–236Google Scholar
  12. Freedman RR, Girgis R (2000) Effects of menstrual cycle and race on peripheral vascular α-adrenergic responsiveness. Hypertension 35:795–799CrossRefGoogle Scholar
  13. Guyton AC, Hall JE (2006) Text book of medical physiology, 11th edn. Elsvier Inc, Philadelphia, pp 291–306Google Scholar
  14. Hale T (2003) Exercise physiology: a thematic approach. John Wiley & Sons Ltd, Chichester, pp 234–235Google Scholar
  15. Kenney RA (1965) A modified pack test of physical fitness. Singap Med J 6(2):103–106Google Scholar
  16. Kollerstrom N, Steffert B (2003) Sex difference in response to stress by lunar month: a pilot study of fours’ crisis-call frequency. BMC Psychiatry 3:20CrossRefGoogle Scholar
  17. Kothari CR (2004) Research methodology: methods and techniques, 2nd edn. New Age International (P) Ltd, New Delhi, pp 193–195Google Scholar
  18. Kuwahara T, Yoshimitsu I, Miyako A, Yuki S, Narihiko K (2005) Effects of menstrual cycle and physical training on heat loss responses during dynamic exercise at moderate intensity in temperate environment. Am J Physiol Regul Integr Comp Physiol 288:R1347–R1353CrossRefGoogle Scholar
  19. Law SP (1986) The regulation of menstrual cycle and its relationship to the moon. Acta Obstet Gynecol Scand 65:45–48CrossRefGoogle Scholar
  20. Lieber AL, Sherin CR (1972) Homicides and the lunar cycle: toward a theory of lunar influence on human emotional disturbance. Am J Psychiatry 129:69–74Google Scholar
  21. Martin SJ, Kelly IW, Saklofske DH (1992) Suicide and lunar cycles: a critical review over 28 years. Psychol Rep 71:529–532CrossRefGoogle Scholar
  22. Myers DE (1995) Gravitational effects of the period of high tides and the new moon on lunacy. J Emerg Med 13:529–532CrossRefGoogle Scholar
  23. Monkhouse FJ (1971) Principles of physical geography, 7th edn. University of London Press, London, pp 363–370Google Scholar
  24. Morgan E (2001) The moon and life on earth. Earth Moon Planet 85–86:279–290Google Scholar
  25. Pickering GP, Fellmann N, Morio B, Ritz P, Amonchot A, Vermorel M, Coudert J (1997) Effects of endurance training on the cardiovascular system and water compartments in elderly subjects. J Appl Physiol 83(4):1300–1306Google Scholar
  26. Poliner LR, Dehmer GJ, Lewis SE, Parkey RW, Blomqvist CG, Willerson JT (1980) Left ventricular performance in normal subjects: a comparison of the responses to exercise in the upright and supine positions. Circulation 62:528–534CrossRefGoogle Scholar
  27. Polychronopoulos P, Argyriou AA, Sirrou V, Huliara V, Aplada M, Gourzis P, Economou A, Terzis E, Chroni E (2006) Lunar phases and seizure occurrence: just an ancient legend? Neurology 66:1442–1443Google Scholar
  28. Raison CL, Klein HM, Steckler M (1999) The moon and madness reconsidered. J Affect Disord 53:99–106CrossRefGoogle Scholar
  29. Schafer JA, Varano SP, Jarvis JP, Cancino JM (2010) Bad moon on the rise? Lunar cycles and incidents of crime. J Crim Justice 38:359–367CrossRefGoogle Scholar
  30. Terra-Bustamante VC, Scorza CA, de Albuquerque M, Sakamoto AC, Machado HR, Arida RM, Cavalheiro EA, Scorza FA (2009) Does the lunar phases have an effect on sudden unexpected death in epilepsy? Epilepsy Behav 14(2):404–406CrossRefGoogle Scholar
  31. Thakur CP, Sharma D (1984) Full moon and crime. Brit Med J 289:1789–1791CrossRefGoogle Scholar
  32. Thakur CP, Sharma RN, Akhtar HS (1980) Full moon and poisoning. Brit Med J 281:1684CrossRefGoogle Scholar
  33. Tipton CM (2003) Exercise physiology: people and ideas. Oxford University Press Inc, New York, pp 98–137CrossRefGoogle Scholar
  34. Touitou Y, Portaluppi F, Smolensky MH, Rensing L (2004) Ethical principles and standards for the conduct of human and animal biological rhythm research. Chronobiol Int 21:161–170CrossRefGoogle Scholar
  35. Watkins J (1984) Step tests of cardiorespiratory fitness suitable for mass testing. Brit J Sports Med 18(2):84–89CrossRefGoogle Scholar
  36. Yvonneau M (1996) Views from Dordogne and the moon, on suicide. [Article in French] Encephale 22:52–57Google Scholar
  37. Zimecki M (2006) The lunar cycle: effects on human and animal behavior and physiology. Postepy Hig Med Dosw 60:1–7Google Scholar

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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