TheFinalSprint.com - Track & Field, Marathons, Racing News, Training Advice, Elite Athlete Blogs, Interviews, Podcasts, Videos and More! - TheFinalSprint.com is the Premier Destination for Track & Field, Marathon, Cross Country, Olympic and Road Racing Enthusiasts.

Lead Stories: Monday, December 1, 2008

Low Blood Sugar Causes Mental Fatigue During Competition

Posted November 23rd, 2007 at 3:45 PM by Martha Jones

Section: Nutrition, Race Prep & Recov, Health & Fitness, Exercise

Athletes can expect to feel fatigued when their blood sugar levels drop. Researchers at Loughborough University, UK showed that athletes who did not take sugar during soccer competition lasting 90 minutes felt more tired, had less competitive desire, and had far lower blood sugar levels than athletes who took a sugared drink every 15 minutes during their game (Scandinavian Journal of Medicine & Science in Sports, October 2007).

Your brain gets more than 98 percent of its energy from sugar in the bloodstream. However there is only enough sugar in the bloodstream to last about three minutes. The liver must constantly release sugar into the bloodstream, but there is only enough sugar in the liver to last eight hours during rest and far less than that during exercise. So athletes who do not take a source of sugar during events lasting more than an hour can suffer the psychological effects of low blood sugar levels what include a mental feeling of fatigue and lowered competitive desire.
Read the rest of this entry »

2 comments, add yours | Permalink

Running vs. Cycling
Which burns more calories?

Posted December 12th, 2006 at 7:00 AM by Jeanie Rebb

Section: Running & Training, Health & Fitness, Exercise

The standard comparison is that one mile of running equals four miles of cycling, but that’s lousy science.

Although running requires the same amount of energy per mile at any speed (110 calories per mile), riding is affected by wind resistance so the faster you ride, the more energy you use. So you have to compare running and cycling at different cycling speeds.

Dr. Edward Coyle of the University of Texas determined average values of oxygen consumption by cyclists to develop a table to estimate the approximate caloric equivalence between running and cycling.
Read the rest of this entry »

9 comments, add yours | Permalink