Effects of pre-exercise glycerol supplementation on dehydration, metabolic, kinematic, and thermographic variables in international race walkers

References

• Racinais S, Ihsan M, Taylor L, et al. Hydration and cooling in elite athletes: relationship with performance, body mass loss and body temperatures during the Doha 2019 IAAF World athletics championships. Br J Sports Med. 2021;55(23):1335–381. doi: 10.1136/bjsports-2020-103613
   PubMed Web of Science ®Google Scholar
• Sugawara M, Manabe Y, Yamasawa F, et al. Athlete medical services at the marathon and race walking events during Tokyo 2020 Olympics. Front Sports Act Living. 2022;4:872475. doi: 10.3389/fspor.2022.872475
   PubMedGoogle Scholar
• Galan-Lopez N, Esh CJ, Leal DV, et al. Heat preparation and knowledge at the world athletics race walking team championships muscat 2022. Int J Sports Physiol Perform. 2023;18(8):813–824. doi: 10.1123/ijspp.2022-0446
   PubMed Web of Science ®Google Scholar
• Kakamu T, Wada K, Smith DR, et al. Preventing heat illness in the anticipated hot climate of the Tokyo 2020 summer Olympic games. Environ Health Prev Med. 2017;22(1):68. doi: 10.1186/s12199-017-0675-y
   PubMed Web of Science ®Google Scholar
• Racinais S, Alonso JM, Coutts AJ, et al. Consensus recommendations on training and competing in the heat. Sports Med. 2015;45(7):925–938. doi: 10.1007/s40279-015-0343-6
   PubMed Web of Science ®Google Scholar
• Trangmar SJ, González-Alonso J. Heat, hydration and the human brain, heart and skeletal muscles. Sports Med. 2019;49(Suppl 1):69–85. doi: 10.1007/s40279-018-1033-y
   PubMedGoogle Scholar
• Watanabe K, Stöhr EJ, Akiyama K, et al. Dehydration reduces stroke volume and cardiac output during exercise because of impaired cardiac filling and venous return, not left ventricular function. Physiol Rep. 2020;8(11):e14433. doi: 10.14814/phy2.14433
   PubMed Web of Science ®Google Scholar
• Nybo L, Rasmussen P, Sawka MN. Performance in the heat-physiological factors of importance for hyperthermia-induced fatigue. Compr Physiol. 2014;4(2):657–689.
   PubMed Web of Science ®Google Scholar
• Nybo L, Nielsen B. Hyperthermia and central fatigue during prolonged exercise in humans. J Appl Physiol. 2001;91(3):1055–1060. doi: 10.1152/jappl.2001.91.3.1055
   PubMed Web of Science ®Google Scholar
• Fink WJ, Costill DL, Van Handel PJ. Leg muscle metabolism during exercise in the heat and cold. Eur J Appl Physiol Occup Physiol. 1975;34(3):183–190. doi: 10.1007/BF00999931
   PubMed Web of Science ®Google Scholar
• Young AJ, Sawka MN, Levine L, et al. Skeletal muscle metabolism during exercise is influenced by heat acclimation. J Appl Physiol. 1985;59(6):1929–1935. doi: 10.1152/jappl.1985.59.6.1929
   PubMed Web of Science ®Google Scholar
• van Rosendal SP, Coombes JS. Glycerol use in hyperhydration and rehydration: scientific update. Med Sport Sci. 2012;59:104–112.
   PubMedGoogle Scholar
• van Rosendal SP, Osborne MA, Fassett RG, et al. Guidelines for glycerol use in hyperhydration and rehydration associated with exercise. Sports Med. 2010;40(2):113–129. doi: 10.2165/11530760-000000000-00000
   PubMed Web of Science ®Google Scholar
• Bortz WM, Paul P, Haff AC, et al. Glycerol turnover and oxidation in man. J Clin Invest. 1972;51(6):1537–1546. doi: 10.1172/JCI106950
   PubMed Web of Science ®Google Scholar
• Robergs RA, Griffin SE. Glycerol. Biochemistry, pharmacokinetics and clinical and practical applications. Sports Med. 1998;26(3):145–167. doi: 10.2165/00007256-199826030-00002
   PubMed Web of Science ®Google Scholar
• Anderson MJ, Cotter JD, Garnham AP, et al. Effect of glycerol-induced hyperhydration on thermoregulation and metabolism during exercise in heat. Int J Sport Nutr Exerc Metab. 2001;11(3):315–333. doi: 10.1123/ijsnem.11.3.315
   PubMed Web of Science ®Google Scholar
• Goulet ED, Rousseau SF, Lamboley CR, et al. Pre-exercise hyperhydration delays dehydration and improves endurance capacity during 2 h of cycling in a temperate climate. J Physiol Anthropol. 2008;27(5):263–271. doi: 10.2114/jpa2.27.263
   PubMedGoogle Scholar
• Marino FE, Kay D, Cannon J. Glycerol hyperhydration fails to improve endurance performance and thermoregulation in humans in a warm humid environment. Pflugers Arch Eur J Physiol. 2003;446(4):455–462. doi: 10.1007/s00424-003-1058-3
   PubMed Web of Science ®Google Scholar
• van Rosendal SP, Osborne MA, Fassett RG, et al. Physiological and performance effects of glycerol hyperhydration and rehydration. Nutr Rev. 2009;67(12):690–705. doi: 10.1111/j.1753-4887.2009.00254.x
   PubMed Web of Science ®Google Scholar
• Urbaniak GC, Plous S. Research randomizer (version 4.0)[computer software]. 2013.
   Google Scholar
• Mundial AM. Editor Declaración de Helsinki de la Asociación médica mundial. Principios éticos para las investigaciones médicas en seres humanos. An Sist Sanit Navar. 2008;24: 209–212.
   Google Scholar
• Bruning RS, Dahmus JD, Kenney WL, et al. Aspirin and clopidogrel alter core temperature and skin blood flow during heat stress. Med Sci Sports Exerc. 2013;45(4):674–682. doi: 10.1249/MSS.0b013e31827981dc
   PubMed Web of Science ®Google Scholar
• Moreira DG, Costello JT, Brito CJ, et al. Thermographic imaging in sports and exercise medicine: a Delphi study and consensus statement on the measurement of human skin temperature. J Therm Biol. 2017;69:155–162. doi: 10.1016/j.jtherbio.2017.07.006
   PubMed Web of Science ®Google Scholar
• Cabizosu A, Carboni N, Martínez-Almagro Andreo A, et al. Relationship between infrared skin radiation and muscular strength tests in patients affected by emery-dreifuss muscular dystrophy. Med Hypotheses. 2020;138:109592. doi: 10.1016/j.mehy.2020.109592
   PubMed Web of Science ®Google Scholar
• Martínez-Noguera FJ, Cabizosu A, Marín-Pagán C, et al. Body surface profile in ambient and hot temperatures during a rectangular test in race walker champions of the World Cup in Oman 2022. J Therm Biol. 2023;114:103548. doi: 10.1016/j.jtherbio.2023.103548
   PubMed Web of Science ®Google Scholar
• Bernard V, Staffa E, Mornstein V, et al. Infrared camera assessment of skin surface temperature–effect of emissivity. Phys Med. 2013;29(6):583–591. doi: 10.1016/j.ejmp.2012.09.003
   PubMed Web of Science ®Google Scholar
• Tomkinson GR, Olds TS. Secular changes in pediatric aerobic fitness test performance: the global picture. Med Sport Sci. 2007;50:46–66.
   PubMedGoogle Scholar
• Marins JB, de Andrade Fernandes A, Moreira DG, et al. Thermographic profile of soccer players’ lower limbs. Revista Andaluza de Medicina Del Deporte. 2014;7(1):1–6. doi: 10.1016/S1888-7546(14)70053-X
   Google Scholar
• Elsharkawy H, El-Boghdadly K, Barrington M. Quadratus lumborum block: anatomical concepts, mechanisms, and techniques. Anesthesiology. 2019;130(2):322–335. doi: 10.1097/ALN.0000000000002524
   PubMed Web of Science ®Google Scholar
• Cohen J. Statistical power analysis for the behavioral sciences. New York: Academic press; 2013.
   Google Scholar
• Blazejczyk K, Bröde P, Fiala D, et al. UTCI - New index for assessment of heat stress in man. Przeglad Geograficzny. 2010;82:49–71.
   Google Scholar
• Hitchins S, Martin DT, Burke L, et al. Glycerol hyperhydration improves cycle time trial performance in hot humid conditions. Eur J Appl Physiol Occup Physiol. 1999;80(5):494–501. doi: 10.1007/s004210050623
   PubMed Web of Science ®Google Scholar
• Nikkilae EA, Ojala K. Gluconeogenesis from glycerol in fasting rats. Life Sci. 1962;3(3):243–249. doi: 10.1016/0024-3205(64)90066-9
   Web of Science ®Google Scholar
• Gleeson M, Maughan RJ, Greenhaff PL. Comparison of the effects of pre-exercise feeding of glucose, glycerol and placebo on endurance and fuel homeostasis in man. Eur J Appl Physiol Occup Physiol. 1986;55(6):645–653. doi: 10.1007/BF00423211
   PubMed Web of Science ®Google Scholar
• Trimmer JK, Casazza GA, Horning MA, et al. Autoregulation of glucose production in men with a glycerol load during rest and exercise. Am J Physiol Endocrinol Metab. 2001;280(4):E657–68. doi: 10.1152/ajpendo.2001.280.4.E657
   PubMed Web of Science ®Google Scholar
• Lin EC. Glycerol utilization and its regulation in mammals. Annu Rev Biochem. 1977;46(1):765–795. doi: 10.1146/annurev.bi.46.070177.004001
   PubMedGoogle Scholar
• Terblanche SE, Fell RD, Juhlin-Dannfelt AC, et al. Effects of glycerol feeding before and after exhausting exercise in rats. J Appl Physiol Respir Environ Exerc Physiol. 1981;50(1):94–101. doi: 10.1152/jappl.1981.50.1.94
   PubMed Web of Science ®Google Scholar
• Miller JM, Coyle EF, Sherman WM, et al. Effect of glycerol feeding on endurance and metabolism during prolonged exercise in man. Med Sci Sports Exerc. 1983;15(3):237–242. doi: 10.1249/00005768-198315030-00010
   PubMed Web of Science ®Google Scholar
• Maughan RJ, Gleeson M. Influence of a 36 h fast followed by refeeding with glucose, glycerol or placebo on metabolism and performance during prolonged exercise in man. Eur J Appl Physiol Occup Physiol. 1988;57(5):570–576. doi: 10.1007/BF00418464
   PubMed Web of Science ®Google Scholar
• Hayes PR, Caplan N. Leg stiffness decreases during a run to exhaustion at the speed at VO2max. Eur J Sport Sci. 2014;14(6):556–562. doi: 10.1080/17461391.2013.876102
   PubMed Web of Science ®Google Scholar
• Pardo Albiach J, Mir-Jimenez M, Hueso Moreno V, et al. The relationship between VO(2)max, power management, and increased running speed: towards gait pattern recognition through clustering analysis. Sensors. 2021;21(7):2422. doi: 10.3390/s21072422
   PubMed Web of Science ®Google Scholar
• Moore IS. Is there an economical running technique? A review of modifiable biomechanical factors affecting running economy. Sports Med. 2016;46(6):793–807. doi: 10.1007/s40279-016-0474-4
   PubMed Web of Science ®Google Scholar
• Santos-Concejero J, Granados C, Irazusta J, et al. Differences in ground contact time explain the less efficient running economy in north African runners. Biol Sport. 2013;30(3):181–187. doi: 10.5604/20831862.1059170
   PubMed Web of Science ®Google Scholar
• Nummela A, Keränen T, Mikkelsson LO. Factors related to top running speed and economy. Int J Sports Med. 2007;28(8):655–661. doi: 10.1055/s-2007-964896
   PubMed Web of Science ®Google Scholar
• Aubry RL, Power GA, Burr JF. An assessment of running power as a training metric for elite and recreational runners. J Strength Cond Res. 2018;32(8):2258–2264. doi: 10.1519/JSC.0000000000002650
   PubMed Web of Science ®Google Scholar
• Ackerman J, Seipel J. Effects of independently altering body weight and mass on the energetic cost of a human running model. J Biomech. 2016;49(5):691–697. doi: 10.1016/j.jbiomech.2016.01.016
   PubMed Web of Science ®Google Scholar
• Lyons TP, Riedesel ML, Meuli LE, et al. Effects of glycerol-induced hyperhydration prior to exercise in the heat on sweating and core temperature. Med Sci Sports Exerc. 1990;22(4):477–483. doi: 10.1249/00005768-199008000-00010
   PubMed Web of Science ®Google Scholar
• Easton C, Turner S, Pitsiladis YP. Creatine and glycerol hyperhydration in trained subjects before exercise in the heat. Int J Sport Nutr Exerc Metab. 2007;17(1):70–91. doi: 10.1123/ijsnem.17.1.70
   PubMed Web of Science ®Google Scholar
• de Andrade Fernandes A, dos Santos Amorim PR, Brito CJ, et al. Measuring skin temperature before, during and after exercise: a comparison of thermocouples and infrared thermography. Physiol Meas. 2014;35(2):189. doi: 10.1088/0967-3334/35/2/189
   PubMed Web of Science ®Google Scholar
• Hillen B, Pfirrmann D, Nägele M, et al. Infrared thermography in exercise physiology: the dawning of exercise radiomics. Sports Med. 2020;50(2):263–282. doi: 10.1007/s40279-019-01210-w
   PubMed Web of Science ®Google Scholar