2013 SIRC Research Award - CSIO's Heather Sprenger

Thursday, June 20, 2013

The SIRC Research Award recognizes outstanding sport research in Canada. Acknowledging how sport research benefits the Canadian sporting community is the primary purpose of this award. Congratulations to all who participated.

We would like to extend our sincere thanks and appreciation to all of our judges and to the following sponsors for their tremendous support: CIHR - Institute of Musculoskeletal Health and Arthritis, EBSCO Host and Coaches of Canada.

“It is through research and learning that we improve. We are fortunate to have excellent sport researchers in Canada who continue to expand our knowledge, challenge our thinking and move us forward. The research papers submitted to this year’s SIRC Research Award are a great example of the brightest minds Canada has in the fields of sport research and e are very pleased to recognize the innovative research in both the areas of high performance sport and impact of sport on the community.” Debra Gassewitz, President and CEO SIRC

And the awards go to…

The Impact of Applied Research on Athletic Excellence - High Performance Category:

“The Effect of Dehydration on Muscle Metabolism & Cycling Performance During Prolonged Exercise in Males” - Dr. Heather Sprenger - University of Guelph

Abstract:

Dehydration of ~1-2% body mass (BM) loss has been shown to augment normal physiological responses to exercise compared to being hydrated and may impair endurance performance. The reality in sport is the majority of athletes arrive to exercise in a dehydrated state and only replace ~50% of sweat losses during exercise leading to significant fluid deficits and amplified physiological stress compared to arriving hydrated and drinking enough fluid throughout exercise to minimize sweat losses. This study investigated the effects of arriving to exercise in a fluid deficit (~0.6%) combined with fluid restriction during 90 min of moderate intensity cycling (~65% VO 2 peak) followed by a time trial (TT, 6 kJ/kg BM) in nine trained male cyclists (VO 2 peak = 4.4 +- 0.2 L/min ). Subjects lost 1.4%, 2.3%, and 3.1% of their BM from sweat loss incurred after 45 min, 90 min, and after the TT respectively. As the degree of dehydration increased, all measured physiological responses were significantly augmented, specifically heart rate, core temperature(Tc), rating of perceived exertion (RPE), blood & muscle lactate, total carbohydrate use, and a trend for greater muscle glycogen use. Additionally, TT performance was 13% slower when male participants were dehydrated by 2-3% BM with all physiological measures exacerbated compared to responses when hydrated.

Bio:

Dr. Sprenger received her Ph.D. degree from the Department of Human Health & Nutritional Sciences at the University of Guelph, Guelph, ON. Her graduate research was funded by the Gatorade Sport Science Institute (GSSI) where Dr. Sprenger’s specialty involved investigating fluid balance before and during exercise and the effects of exercise-induced dehydration on physiological responses, substrate oxidation, muscle metabolism, and performance. Currently Dr. Sprenger applies the principles of sport physiology to many teams and athletes across the province as a Sport Physiologist and Research Lead at the Canadian Sport Institute Ontario. Being a two-sport National Team athlete herself, both in ice hockey and road cycling, Dr. Sprenger’s current research is focused on multi-disciplinary applied sport science research initiatives to improve podium potential and performance in Canadian athletes. Dr. Sprenger has published in such journals as Applied Physiology, Nutrition, & Metabolism, Medicine & Science in Sports & Exercise, Journal of Strength & Conditioning Research, American Journal Physiology, Endocrinology, & Metabolism, and the International Journal of Sports Nutrition & Exercise Metabolism.

Source

Latest News

  • August 18, 2017
    The fall will see the launch of the Ontario Para-swimming Academy at the Toronto Pan Am Sports Centre that will give Ontario Para-swimmers the resources needed to succeed on the international stage. The new initiative will be managed by Don Burton...
  • Ontario Athletes Bring Home 212 Medals
    August 15, 2017
    Ontario athletes topped the medal standings at the 2017 Canada Summer Games, bringing home 212 medals and making fans across the province proud. Team Ontario’s athletes are returning home with 87 gold, 65 silver and 60 bronze medals, including...
  • International Paralympic Committee VISTA 2017 Conference Volunteer Call-Out
    August 14, 2017
    Do you have a passion for Paralympic Sport Science and Sport Medicine? For volunteering? Have you ever dreamed of taking part in a once-in-a-lifetime opportunity and representing your hometown? Well look no further! About VISTA 2017 Toronto, Ontario...
  • RBC Training Ground seeks podium potential athletes in Ontario
    July 31, 2017
    TORONTO (July 31, 2017) - This Fall, four RBC Training Ground Local Qualifiers are set to take place across Ontario, culminating with a Regional Final in Toronto this October in the hopes of finding new Olympic talent. Canadian Sport Institute...
  • Mixed free relay earns third medal for Canada
    July 31, 2017
    BUDAPEST , Hungary – Canada picked up its third medal of the FINA World Championships Saturday, earning bronze in the mixed 4×100-metre freestyle relay in Budapest, Hungary. The team of Yuri Kisil, Javier Acevedo, Chantal Van Landeghem and Penny...