Checking Temps at RIR UPDATE: Mark Martin and Matt Kenseth will have new additions to their respective pit crews next weekend at Richmond. The additional pit workers will concentrate on how the drivers replace the fluids they lose during a race, as well as the cars’ onboard temperatures. Scientists from the Gatorade Sports Science Institute will condict a pilot study on Martin and Kenseth to determine sweat loss, cardiobascular responses and heat stress in drivers during a NASCAR race. During an average race, cockpit temperatures can climb to 140 degrees, putting drivers at risk for dehydration and heat illness. The race-day test will help provide drivers with fluid replacement and heat illness prevention recommendations.(That’s Racin’)(9-3-2001) UPDATE: #6-Mark Martin, and #17-Matt Kenseth, were the subjects of a hydration study that was conducted at the Chevy Monte Carlo 400 in Richmond. Scientists from the Gatorade Sports Science Institute (GSSI) monitored Martin and Kenseth throughout the 400-lap, three-hour and 13-minute event to determine how well NASCAR drivers replace the fluids they lose through sweat during a race. In the grueling heat of a race, cockpit temperatures can often soar well beyond 115 degrees, placing drivers at risk for dehydration, heat illness and impaired performance. Martin’s estimated total sweat loss during the race was 4.5 liters (153 ounces), nearly equivalent to 10 lbs. of bodyweight. However, Martin replaced 78% of his total sweat loss by drinking 3.52 liters (119 ounces) of fluid. Martin still experienced a final bodyweight loss of more than 2 lbs., and a post-race urine sample indicated significant dehydration even with this modest 2-lb. fluid deficit. Kenseth also completed the race, but was off the track and out of his car for nearly an hour due to a mid-race crash. Because he spent less time exposed to intensive cockpit temperatures, Kenseth’s fluid loss was less dramatic than Martin’s. According to GSSI, Kenseth lost 2.1 liters (70 ounces) of sweat. Yet, by drinking 1.66 liters (56 ounces) of fluid during the race, Kenseth was able to replace 81% of the fluid he lost, leaving him fairly well hydrated. Overall, both Martin and Kenseth experienced levels of fluid loss similar to those experienced by other endurance and team sport competitors, such as marathoners and football players. But they did a better job of replacing fluids than several athletes GSSI has studied from these sports. For more information about sports nutrition and exercise science pertaining to The Gatorade Company, visit the Gatorade Sports Science Institute web site at www.gssiweb.com or gatorade.com.(Roush Racing PR)(9-26-2001)
