Changes in the light/dark cycle have profound effects on man's circadian rhythms, particularly when he is required to work or perform adequately in a new time environment. These changes include effects on sleep, mental performance, including judgement and decision-making, and on physical performance. Whilst changes in physical performance are difficult to measure, the effects may influence athletic performance. Athletic teams performing in a new time zone should therefore be flown out well ahead of the planned event to ensure adequate circadian resynchronization.
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References
1.
ArendtJ.MarksV. (1983) Can melatonin alleviate jet-lag?. Brit. Med. J.287, 426.
2.
ArendtJ. (1984) The effect of chronic small doses of melatonin given in the late afternoon on fatigue in man: a preliminary study. Neuroscience Letters (in press).
3.
AschoffJ. (1971) Human circadian rhythms in darkness: entrainment by social time cues. Science171, 213–15.
4.
BaierH.Rompel-PürkhauerCh. (1978) Tagesrhytmische Variationen der Kreislauf und Thermoregulation und der Trainierbarkeit. Sportsmedizin. XI: 323–8.
5.
BerryC. A. (1970) Summary of medical experience in the Apollo 7 through 11 manned space-flights. Aerospace Med.41, 500–19.
6.
ColquhounW. P.PaineM. W. P.H.FortA. (1978) Circadian rhythm of body temperature during prolonged undersea voyages. Aviation, Space and Env. Med.5, 671–8.
7.
ConroyR. T. W.L.MillsJ. N. (1970) Human circadian rhythms.London, Churchill.
8.
ConroyR. T. W.L.O'BrianM. (1973) Diurnal variation in athletic performance. J. Physiol.236, 51.
9.
FlinkE. B.DoeR. P. (1959) Effects of sudden time displacement by air travel on synchronization of adrenal function. Proc. Soc. Exp. Biol. Med.100, 498–501.
10.
JohnsonL. C. (1979) Sleep disturbance in humans. AGARD Lecture Series No. 105. pp 4/1–4/16.
11.
JohnsonL. C.NaitohP. (1974) The operational consequences of sleep deprivation and sleep deficit. AGARD AGARDograph No. 193. NATO-AGARD.
12.
KleinK. E.WegmannH. M.Bruner (1968) Circadian indices of human performance, physical fitness and stress resistance. Aerospace Med.39, 512–78.
13.
KleitmanN. (1967) Sleep and wakefulness.TheUniversity of Chicago Press.
14.
KleitmanN.JacksonD. P. (1950) Body temperature and performance under different routines. J. App. Physiol3, 309–28.
15.
PrestonF. S. (1973a) Aspects of sleep regulation in airline pilots. Medication and Drugs in Flying Personnel. AGARD-CP-108. pp A41-A47.
16.
PrestonF. S. (1973b) Further sleep problems in airline pilots on world-wide schedules. Aerospace Med.44, 775–82.
17.
PrestonF. S. (1974) Physiological problems in air cabin crew. Proc. Roy. Soc. Med.67, 825–829.
18.
PrestonF. S. (1978) Temporal Discord. J. Psychom. Res.22, 377–83.
19.
PrestonF. S.BatemanS. C. (1970) Effect of time-zone changes on the sleep patterns of BOAC B. 707 crews on world-wide schedules. Aerospace Med.41, 1409–1515.
20.
RedmanJ. (1983) Free-running activity rhythms in the rat: entrainment by melatonin. Science219, 1089–91.
21.
ReinbergA. (1970) Evaluation of circadian dysynchronisation during transmeridian flights. Life Sciences and Space Research VIII. Amsterdam, N. Holland Publishing Co., pp. 172–4.
22.
RodahlA. M.O'BrianM.FirthR. G. R. (1976) Diurnal variation in performance of competitor swimmers. J. Sport. Med.16, 72–6.
23.
WebbW. B.AgnewH. W. (1974) Regularity in the control of the free-running sleep-wakefulness rhythm. Aerospace Med45, 701–4.
