The biochemical, physiological and psychological consequences of a “1,000 miles in 1,000 hours” walking challenge
- 170 Downloads
The combined effects of 42 days of chronic sleep disruption and repeated hourly bouts of physical exertion have not been described. This case study reports the physiological and psychological demands placed on one individual who walked 1 mile in each consecutive hour for a period of 1,000 h (42 days), covering a total distance of 1,000 miles. The participant walked at a mean speed of 1.75 m/s completing each mile in approximately 15 min. Over the course of the challenge, the individual lost 1.6 kg in body weight. Markers of skeletal muscle damage, increased gradually whilst free testosterone levels decreased over the course of the challenge. Stress hormones increased whilst inflammatory markers (CRP) initially rose but then returned towards baseline over the course of the study. Cognitive motor performance measured via reaction time was maintained throughout the 42 days. The participant also displayed mood states typical of an elite athlete at baseline and throughout the challenge. Participation in this novel ‘1,000 mile 1,000 h’ walking challenge evoked considerable physiological stress in a fit, healthy middle-aged participant but did not markedly alter cognitive performance or mood over the 42-day period.
KeywordsWalking Sleep disruption Stress hormones Muscle damage Testosterone Mood Cognitive motor performance
Conflict of interest
The authors declare they have no conflict of interest.
- Bonnet MH (2005) Sleep fragmentation. In: Lenfant C (ed) Sleep deprivation. Marcel Dekker, New York, pp 103–117Google Scholar
- Crawford JM, Radford PF and Simpson HW (1990) Chronobiological analysis of 1000 miles walked in 1000 hours. In: Chronobiology: its role in clinical medicine, general biology and agriculture, Part B. Wiley-Liss Inc., New York, pp 291–297Google Scholar
- Educational and Industrial Testing Service (1989) 30-Item profile of mood states questionnaire. The Educational and Industrial Testing Service, San DiegoGoogle Scholar
- Horne JA, Foster SC (1995) Can exercise overcome sleepiness? [Abstracts]. Sleep Res 24A:437Google Scholar
- Kanter MM, Lesmes GR, Kaminsky LA, Ham-Saeger JL, Nequin ND (1988) Serum creatine kinase and lactate dehydrogenase changes following an eighty kilometer race. Eur J Appl Physiol 74:965–969Google Scholar
- Morgan WP (1979) Prediction of performance in athletes. In: Klavora P, Daniel JV (eds) Coach, athlete and the sport psychologist human kinetics. Champaign, Illinois, pp 173–186Google Scholar
- Nicholson G (2008) The lost art of walking: the history science philosophy and literature of pedestrianism. Riverhead Books, New YorkGoogle Scholar
- Radford P (2001) The Celebrated Captain Barclay Sport money and fame in regency Britain. Headline Pub, LondonGoogle Scholar