Macronutrient Consumption Prior to, and during, a Mountain Marathon
American Journal of Sports Science
Volume 2, Issue 1, January 2014, Pages: 5-12
Received: Dec. 10, 2013; Published: Jan. 20, 2014
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Authors
Elizabeth Mahon, Faculty of Education, Health and Community, Liverpool John Moores University, Liverpool, United Kingdom
Allan Hackett, Faculty of Education, Health and Community, Liverpool John Moores University, Liverpool, United Kingdom
Timothy Stott, Faculty of Education, Health and Community, Liverpool John Moores University, Liverpool, United Kingdom
Keith George, Research Institute for Sport and Exercise Sciences, Liverpool John Moores University, Liverpool, United Kingdom
Ian Davies, Faculty of Education, Health and Community, Liverpool John Moores University, Liverpool, United Kingdom
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Abstract
Participation in ultra-endurance events such as mountain marathons is increasing, yet analysis of the nutritional intake and requirements of this group of athletes have received relatively little attention. This field study examined athletes’ food intake prior to, and during a mountain marathon event to assess compliance with recommendations and to identify associations with performance. Nineteen male athletes competing in the Longmynd Hike (LH) completed a 7-day food diary in the week prior to the event and a weighed food inventory of all items consumed during the event. Despite reported intentions to increase carbohydrate (CHO) consumption in the week prior to the event, there was no significant change in consumption across the week. The mean daily CHO intake of 4.5 g/kg/d was below that recommended to effectively enhance glycogen stores. CHO and energy consumption prior to the event were positively associated with performance [energy (kJ/kg/d): r = .56, p = 0.03; CHO (g/kg/d): r = .54, p = 0.04]. Energy and CHO consumption during the event were also positively correlated with performance [energy (kJ/kg/h): r = .80, p < 0.001; CHO (g/kg/h): r = .75, p = 0.001)], despite most participants again failing to meet recommendations for intake. Further research is needed to determine reasons for non-compliance with nutritional guidelines and to investigate to what extent type and timing of macronutrient intake during such events impacts on performance.
Keywords
Ultra-Endurance, Exercise, Carbohydrate, Fat, Running, Hill-Walking
To cite this article
Elizabeth Mahon, Allan Hackett, Timothy Stott, Keith George, Ian Davies, Macronutrient Consumption Prior to, and during, a Mountain Marathon, American Journal of Sports Science. Vol. 2, No. 1, 2014, pp. 5-12. doi: 10.11648/j.ajss.20140201.12
References
[1]
A. La Gerche, D.L. Prior, and H. Heidbuchel, "Strenuous endurance exercise: is more better for everyone? Our genes won’t tell us." British Journal of Sports Medicine, vol. 45, pp. 412-426, 2011.
[2]
H.R. Clark, M.E. Barker, and B,M. Corfe, "Nutritional Strategies of Mountain Marathon Competitors – An Observational Study." International Journal of Sport Nutrition and Exercise Metabolism, vol. 15, pp. 160-172, 2005.
[3]
P.N. Ainslie, I.T. Campbell, J.P. Lambert, D.P.M. MacLaren, and T. Reilly, "Physiological and Metabolic Aspects of very Prolonged Exercise with Particular Reference to Hill Walking." Sports Medicine, vol. 35, pp. 619-647, 2005.
[4]
R.B. Kreider, "Physiological considerations of ultraendurance performance." International Journal of Sport Nutrition, vol. 1, pp. 3-27, 1991.
[5]
N.E. Kimber, J.J. Ross, S.L. Mason, and D.B. Speedy, "Energy balance during an ironman triathlon in male and female triathletes." International Journal of Sport Nutrition and Exercise Metabolism, vol. 12, pp. 47-62, 2002.
[6]
J.A. Hawley, E.J. Schabort, T.D. Noakes, and S.C. Dennis, "Carbohydrate-loading and exercise performance: an update." Sports Medicine, vol. 24, pp. 73-81, 1997.
[7]
C.J. Hulston, and A.E. Jeukendrup, A.E. "No placebo effect from carbohydrate intake during prolonged exercise." International Journal of Sport Nutrition and Exercise Metabolism, vol. 19, pp. 275-284, 2009.
[8]
J.W. Smith, J.J. Zachweija, F. Peronnet, D.H. Passe, D. Massicotte, C. Lavoie, and D.D. Pascoe, "Fuel selection and cycling endurance performance with ingestion of [13C] glucose: evidence for a carbohydrate dose response." Journal of Applied Physiology, vol. 108, pp. 1520-1529, 2010.
[9]
K.L. Osterberg, J.J. Zachwieja, and J.W. Smith, "Carbohydrate and carbohydrate + protein for cycling time-trail performance." Journal of Sports Science, vol. 26, pp. 227-33, 2008.
[10]
J. Temesi, N.A. Johnson, J. Raymond, C.A. Burdon, and H.T. O’Connor, "Carbohydrate ingestion during endurance exercise improves performance in adults." The Journal of Nutrition, vol. 141, pp. 890-897, 2011.
[11]
American College of Sports Medicine (ACSM), American Dietetic Association & Dieticians of Canada. "Nutrition and Athletic Performance." Medicine and Science in Sports and Exercise, vol. 41, pp. 709-731, 2009.
[12]
International Olympic Committee (IOC). "IOC consensus statement on sports nutrition 2010." Journal of Sports Sciences, vol. 29:sup1, pp. S3-S4, 2011.
[13]
L.M. Burke, and J.A. Hawley, "Effects of short term fat-adaptation on metabolism and performance of prolonged exercise." Medicine and Science in Sports and Exercise, vol. 34, pp. 1492-1498, 2002.
[14]
J.A. Hawley, F. Brouns, and A.E. Jeukendrup, A. "Strategies to enhance fat utilisation during exercise." Sports Medicine, vol. 25, pp. 241-257, 1998.
[15]
R.J. Maughan, P.L. Greenhaff, M. Gleeson, C.E. Fenn, and J.B. Leiper, "The effect of dietary carbohydrate intake on the metabolic response to prolonged walking on consecutive days." European Journal of Applied Physiology, vol. 56, pp. 583-591, 1987.
[16]
P.N. Ainslie, I.T. Campbell, K.N. Frayn, S.M. Humphreys, D.P.M. MacLaren, and T. Reilly, "Physiological and metabolic responses to a hill walk." Journal of Applied Physiology, vol. 92, pp. 179-187, 2002.
[17]
L.G.C.E. Pugh, "Accidental hypothermia in walkers, climbers, and campers: report to the Medical Commission on Accident Prevention." British Medical Journal, vol.1, pp. 123-129, 1966.
[18]
M. Kruesman, S. Bucher, M. Bovard, B. Kayser, and p.A. Bovier, "Nutrient intake and performance during a mountain marathon: an observational study." European Journal of Applied Physiology, vol. 94, pp. 151-157, 2005.
[19]
K.J. Stuempfle, M.D. Hoffman, L.B. Weschler, I.R. Rogers, and T. Hew-Butler, "Race diet of finishers and non-finishers in a 100 mile (161 km) mountain footrace." Journal of the American College of Nutrition, vol. 30, pp. 529-535, 2011.
[20]
The Longmynd Hike. "The Hike Route." Available at: http://www.longmyndhike.org.uk/hikeroute (Accessed on: 29.11.09).
[21]
R.A. McCance, and E.M. Widdowson, "The Composition of Foods", 6th Edition. Food Standards Agency and the Institute of Food Research. Cambridge: Royal Society of Chemistry, 2002.
[22]
Abbott. "Optium Blood Glucose Monitoring System: User’s Guide." Abbott Laboratories Ltd: Abbott Diabetes Care, 2009.
[23]
J.L. Thompson, M.M. Manore, and J.S. Skinner, J.S. "Daily energy expenditure in male endurance athletes with differing energy intakes." Medicine and Science in Sports and Exercise, vol. 27, pp. 347-354, 1995.
[24]
L.M. Burke, R.A. Gollan, and R.S.D. Read, "Dietary intakes and food use of groups of elite Australian male athletes." International Journal of Sports Nutrition, vol. 1, pp. 378-394, 1991.
[25]
L.M. Burke, J.A. Hawley, S.H.S. Wong, and A.E. Jeukendrup, "Carbohydrates for training and competition." Journal of Sports Sciences, vol. 29:sup1, pp. S17-S27, 2011.
[26]
L.M. Burke, and R.S.D. Read, "A study of carbohydrate loading techniques used by marathon runners." Canadian Journal of Sports Science, vol. 12, pp. 6-10, 1987.
[27]
L. Havemann, and J.H. Goedecke, "Nutritional practises of male cyclists before and during an ultraendurance event." International Journal of Sport Nutrition and Exercise Metabolism, vol. 18, pp. 551-566, 2008.
[28]
A.L. Carey, H.M. Staudacher, N.K. Cummings, N.K. Stepto, V. Nikolopoulos, L.M. Burke, and J.A. Hawley, "Effects of fat adaptation and carbohydrate restoration on prolonged endurance exercise." Journal of Applied Physiology, vol. 91, pp. 115-122, 2001.
[29]
W.M. Sherman, D.L. Costill, W.J. Fink, and J.M. Miller, "Effect of exercise-diet manipulation on muscle glycogen and its subsequent utilisation during performance." International Journal of Sports Medicine, vol. 2, pp. 114-118, 1981.
[30]
V.A. Bussau, T.J. Fairchild, A. Rao, P. Steele, and P.A. Fournier, "Carbohydrate loading in human muscle: an improved 1 day protocol." European Journal of Applied Physiology, vol. 87, pp. 290-295, 2002.
[31]
P.N. Ainslie, I.T. Campbell, K.N. Frayn, S.M. Humphreys, D.P.M. MacLaren, T. Reilly, and K.R. Weserterp, "Energy balance, metabolism, hydration and performance during strenuous hill walking: the effect of age." Journal of Applied Physiology, vol. 93, pp. 714-723, 2002.
[32]
L.M. Burke, G.R. Cox, N.K. Cummings, and B. Desbrow, "Guidelines for daily carbohydrate intake: do athletes achieve them?" Sports Medicine, vol. 31, pp. 267-299, 2001.
[33]
K.E. Fallon, E. Broad, M.W. Thompson, and P.A. Reull, "Nutritional and fluid intake in a 100-km ultramarathon." International Journal of Sports Nutrition, vol. 8, pp. 24-35, 1998.
[34]
K.E. Black, P.M.L. Skidmore, and R.C. Brown, "Energy intakes of ultraendurance cyclists during competition, an observational study." International Journal of Sport Nutrition and Exercise Metabolism, vol. 22, pp. 19-23, 2012.
[35]
L. Laffel, "Ketone bodies: a review of physiology, pathophysiology and application of monitoring to diabetes." Diabetes, Metabolism Research and Reviews, vol. 15, pp. 412-426, 1999.
[36]
J.H. Koeshlag, T.D. Noakes, and A.W. Sloan, "Post-exercise ketosis." Journal of Physiology, vol. 301, pp. 79-90, 1980.
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