Influence of hypohydration on intermittent sprint performance in the heat

Maxwell, N.S., Mackenzie, R.W.A. and Bishop, D. 2009. Influence of hypohydration on intermittent sprint performance in the heat. International Journal of Sports Physiology and Performance. 4 (1), pp. 54-67.

TitleInfluence of hypohydration on intermittent sprint performance in the heat
AuthorsMaxwell, N.S., Mackenzie, R.W.A. and Bishop, D.
Abstract

Purpose: To examine the effect of hypohydration on physiological strain and intermittent sprint exercise performance in the heat (35.5 ± 0.6°C, 48.7 ± 3.4% relative humidity). Methods: Eight unacclimatized males (age 23.4 ± 6.2 y, height 1.78 ± 0.04 m, mass 76.8 ± 7.7 kg) undertook three trials, each over two days. On day 1, subjects performed 90 min of exercise/heat-induced dehydration on a cycle ergometer, before following one of three rehydration strategies. On day 2, subjects completed a 36-min cycling intermittent sprint test (IST) with a −0.62 ± 0.74% (euhydrated, EUH), −1.81 (0.99)% (hypohydrated1, HYPO1), or −3.88 ± 0.89% (hypohydrated2, HYPO2) body mass deficit. Results: No difference was observed in average total work (EUH, 3790 ± 556 kJ; HYPO1, 3785 ± 628 kJ; HYPO2, 3647 ± 339 kJ, P = 0.418), or average peak power (EUH, 1315 ± 129 W; HYPO1, 1304 ± 175 W; HYPO2, 1282 ± 128 W, P = 0.356) between conditions on day 2. Total work and peak power output in the sprint immediately following an intense repeated sprint bout during the IST were lower in the HYPO2 condition. Physiological strain index was greater in the HYPO2 vs. the EUH condition, but without changes in metabolic markers. Conclusion: A greater physiological strain was observed with the greatest degree of hypohydration; however, sprint performance only diminished in the most hypohydrated state near the end of the IST, following an intense bout of repeating sprinting.

JournalInternational Journal of Sports Physiology and Performance
Journal citation4 (1), pp. 54-67
ISSN1555-0265
YearMar 2009
PublisherHuman Kinetics
Web address (URL)http://journals.humankinetics.com/ijspp-back-issues/IJSPPVolume4Issue1March/InfluenceofHypohydrationonIntermittentSprintPerformanceintheHeat
Publication dates
PublishedMar 2009
File

Related outputs

High intensity exercise decreases IP6K1 muscle content & improves insulin sensitivity in glucose intolerant individuals
Naufahu, J., Elliott, B., Markiv, A., Dunning-Foreman, P., McGrady, M., Howard, D., Watt, P.W. and Mackenzie, R.W.A. 2018. High intensity exercise decreases IP6K1 muscle content & improves insulin sensitivity in glucose intolerant individuals. Journal of Clinical Endocrinology and Metabolism. 103 (4), pp. 1479-1490. https://doi.org/10.1210/jc.2017-02019

Akt/PKB activation and insulin signaling: a novel insulin signaling pathway in the treatment of type 2 diabetes
Mackenzie, R.W.A. and Elliott, B.T. 2014. Akt/PKB activation and insulin signaling: a novel insulin signaling pathway in the treatment of type 2 diabetes. Diabetes, Metabolic Syndrome and Obesity: Targets and Therapy. 7, pp. 55-64. https://doi.org/10.2147/DMSO.S48260

Attenuation of plasma annexin A1 in human obesity
Kosicka, A., Cunliffe, A., Mackenzie, R.W.A., Gulrez Zariwala, M., Perretti, M., Flower, R.J. and Renshaw, D. 2013. Attenuation of plasma annexin A1 in human obesity. FASEB Journal. 27 (1), pp. 368-378. https://doi.org/10.1096/fj.12-213728

Partial heat acclimation of athletes with spinal cord lesion
Castle, P.C., Pasan Kularatne, B., Brewer, J., Mauger, A.R., Austen, R.A., Tuttle, J.A., Sculthorpe, N., Mackenzie, R.W.A., Maxwell, N.S. and Webborn, A.D.J. 2013. Partial heat acclimation of athletes with spinal cord lesion. European Journal of Applied Physiology. 113 (1), pp. 109-115. https://doi.org/10.1007/s00421-012-2417-6

Concurrent resistance and aerobic exercise stimulates both myofibrillar and mitochondrial protein synthesis in sedentary middle-aged men
Donges, C.E., Burd, N.A., Duffield, R., Smith, G.C., West, D.D.W., Short, M.J., Mackenzie, R.W.A., Plank, L.D., Shepherd, P.R., Phillips, S.M. and Edge, J.A. 2012. Concurrent resistance and aerobic exercise stimulates both myofibrillar and mitochondrial protein synthesis in sedentary middle-aged men. Journal of Applied Physiology. 112 (12), pp. 1992-2001. https://doi.org/10.​1152/​japplphysiol.​00166.​2012

The effect of hypoxia and work intensity on insulin resistance in type 2 diabetes
MacKenzie, R., Elliott, B., Maxwell, N.S., Brickley, G. and Watt, P.W. 2012. The effect of hypoxia and work intensity on insulin resistance in type 2 diabetes. Journal of Clinical Endocrinology and Metabolism. 97 (1), pp. 155-62. https://doi.org/10.1210/jc.2011-1843

Intermittent exercise with and without hypoxia improves insulin sensitivity in individuals with type 2 diabetes
MacKenzie, R., Maxwell, N.S., Castle, P.C., Elliott, B., Brickley, G. and Watt, P.W. 2012. Intermittent exercise with and without hypoxia improves insulin sensitivity in individuals with type 2 diabetes. Journal of Clinical Endocrinology and Metabolism. 97 (4), pp. 46-55. https://doi.org/10.1210/jc.2011-2829

Intermittent exercise with and without hypoxia improves insulin sensitivity in individuals with type 2 diabetes
Mackenzie, R.W.A., Maxwell, N.S., Castle, P.C., Elliott, B.T., Brickley, G. and Watt, P.W. 2012. Intermittent exercise with and without hypoxia improves insulin sensitivity in individuals with type 2 diabetes. Journal of Clinical Endocrinology and Metabolism. 97 (4), pp. E546-E555. https://doi.org/10.1210/jc.2011-2829

The central role of myostatin in skeletal muscle and whole body homeostasis
Elliott, B.T., Renshaw, D., Getting, S.J. and Mackenzie, R.W.A. 2012. The central role of myostatin in skeletal muscle and whole body homeostasis. Acta Physiologica. 205 (3), pp. 324-340. https://doi.org/10.1111/j.1748-1716.2012.02423.x

The effect of hypoxia and work intensity on insulin resistance in type 2 diabetes
Mackenzie, R.W.A., Elliott, B.T., Maxwell, N.S., Brickley, G. and Watt, P.W. 2012. The effect of hypoxia and work intensity on insulin resistance in type 2 diabetes. Journal of Clinical Endocrinology and Metabolism. 97 (1), pp. 155-162. https://doi.org/10.1210/jc.2011-1843

Heat acclimation improves intermittent sprinting in the heat but additional pre-cooling offers no further ergogenic effect
Castle, P.C., Mackenzie, R.W.A., Maxwell, N.S., Webborn, A.D.J. and Watt, P.W. 2011. Heat acclimation improves intermittent sprinting in the heat but additional pre-cooling offers no further ergogenic effect. Journal of Sports Sciences. 29 (11), pp. 1125-1134. https://doi.org/10.1080/02640414.2011.583673

Acute hypoxia and exercise improve insulin sensitivity (S(I) (2) *) in individuals with type 2 diabetes
Mackenzie, R.W.A., Maxwell, N.S., Castle, P.C., Brickley, G. and Watt, P.W. 2011. Acute hypoxia and exercise improve insulin sensitivity (S(I) (2) *) in individuals with type 2 diabetes. Diabetes - Metabolism: Research and Reviews. 27 (1), pp. 94-101. https://doi.org/10.1002/dmrr.1156

Acute hypoxia improves insulin sensitivity (SI2*) and β cell function in individuals with Type 2 Diabetes
Mackenzie, R.W.A., Elliott, B.T., Brickley, G. and Watt, P.W. 2010. Acute hypoxia improves insulin sensitivity (SI2*) and β cell function in individuals with Type 2 Diabetes. The Physiological Society. University of Manchester

Intermittent exercise decreases insulin resistance in the 48 hrs following exercise in individuals with type 2 diabetes
Mackenzie, R.W.A. and Watt, P.W. 2009. Intermittent exercise decreases insulin resistance in the 48 hrs following exercise in individuals with type 2 diabetes. Endocrine Society 91st Annual Meeting. Washington, DC 10 - 13 Jun 2009

Exercise and acute hypoxia improve insulin sensitivity (SI2*) in individuals with type 2 diabetes
Mackenzie, R.W.A. and Watt, P.W. 2009. Exercise and acute hypoxia improve insulin sensitivity (SI2*) in individuals with type 2 diabetes. Society for Endocrinology BES 2009. Harrogate 16 - 19 Mar 2009

Heat acclimation improves intermittent sprint performance in the heat, but additional pre-cooling is not further ergogenic
Castle, P.C., Mackenzie, R.W.A., Maxwell, N.S., Webborn, A.D.J. and Watt, P.W. 2009. Heat acclimation improves intermittent sprint performance in the heat, but additional pre-cooling is not further ergogenic. BASES Annual Conference. Leeds Metropolitan University 01 - 03 Sep 2009

Acute normobaric hypoxia stimulates erythropoietin release
Mackenzie, R.W.A., Watt, P.W. and Maxwell, N.S. 2008. Acute normobaric hypoxia stimulates erythropoietin release. High Altitude Medicine and Biology. 9 (1), pp. 28-37. https://doi.org/10.1089/ham.2007.1043

Acute hypoxia alters glucose tolerance in type 2 diabetes
Mackenzie, R.W.A., Hammond, E. and Watt, P.W. 2007. Acute hypoxia alters glucose tolerance in type 2 diabetes. The Endocrine Society 89th Annual Meeting. Toronto, Canada 02 - 05 Jun 2007

Increased carbon dioxide expiration in recovery from maximal exercise in children with cystic fibrosis
Brickley, G., Adams, A., Mackenzie, R.W.A., Lenton, J. and Seddon, P. 2006. Increased carbon dioxide expiration in recovery from maximal exercise in children with cystic fibrosis. American Thoracic Society International Conference. San Diego 19 - 24 May 2006

Physical activity and fitness in children with Cystic Fibrosis
Adams, A., Mackenzie, R.W.A., Lenton, J., Brickley, G. and Seddon, P. 2006. Physical activity and fitness in children with Cystic Fibrosis. Journal of Cystic Fibrosis. 5 (sup. 1), p. S80.

Physical activity and fitness in children with cystic fibrosis
Adams, A., Lenton, J., Brickley, G., Mackenzie, R.W.A. and Seddon, P. 2006. Physical activity and fitness in children with cystic fibrosis. 29th European Cystic Fibrosis Conference. Copenhagen, Denmark 15 - 18 Jun 2006

Invited Response – Levine, B D & Stray-Gundersen, J (2005). Comments on Point: Counterpoint "Positive effects of intermittent hypoxia (live high:train low) on exercise performance are/are not mediated primarily by augmented red cell volume"
Mackenzie, R.W.A. 2005. Invited Response – Levine, B D & Stray-Gundersen, J (2005). Comments on Point: Counterpoint "Positive effects of intermittent hypoxia (live high:train low) on exercise performance are/are not mediated primarily by augmented red cell volume". Journal of Applied Physiology. 99 (6), pp. 2453-2462. https://doi.org/10.1152/japplphysiol.01157.2005

Permalink - https://westminsterresearch.westminster.ac.uk/item/90qx0/influence-of-hypohydration-on-intermittent-sprint-performance-in-the-heat


Share this

Usage statistics

103 total views
327 total downloads
These values cover views and downloads from WestminsterResearch and are for the period from September 2nd 2018, when this repository was created.