In endurance events, the first cause of fatigue is loss of muscle sugar, so athletes do whatever they can to preserve sugar levels. Caffeine causes the body to produce large amounts of adrenalin, which causes fat to be released from fat cells and float in the bloodstream.
This extra fat is taken up by the muscles and used for energy, thus preserving the body’s limited stored supply of muscle sugar. When muscles run our of sugar, the athlete requires more oxygen to do the same job, slows down, fatigues earlier, and has difficulty maintaining his performance.
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How much time should you spend working at your maximum level in your sport, compared to miles or days spent going at a relaxed pace?
Researchers at the University of Madrid in Spain divided competitive distance runners into two groups. One group did frequent intense workouts and fewer slow recovery miles, while the second group did fewer intense workouts and more slow miles (Journal of Strength and Conditioning Research, August 2007).
At the end of five months, the runners who did fewer intense workouts and more recovery miles improved far more than those who ran fewer miles and spent a lot of their time trying to run very fast.
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Welcome to the official blog of rising U.S. track & field star
Jon Rankin; the inaugural member of TheFinalSprint.com’s
Elite Athlete Blog Series. Make sure to check back every other Wednesday for Jon’s latest entry.
Hi everyone. I hope this entry finds all of you happy and healthy this holiday season. I am writing this entry while I sit on my bed feeling terribly sore. Yesterday, December 17th, twenty of us athletes from the U.S. Olympic Training Center in Chula Vista, CA experienced something that will forever change our perspectives on mental toughness and limitations: we spent the day going through the BUD/S Navy Seal training course
The day started off with all of us getting up at 4:30 AM. We departed at 5:10 AM for the Naval Special Warfare Training Center in Coronado, CA. We couldn’t arrive late because to keep the instructors waiting would have made an already-hard day that much harder. They would already be yelling at us and putting us through the worst day, psychologically, of our lives. So we left really early to avoid being late and start off on the wrong foot.
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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.
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Tapering refers to the period just before a major race or game, when an athlete reduces workload to be in peak shape on the day of the competition. Ordinary exercisers can apply this training principle when they plan to enter a local race or charity event.
Top athletes must spend a tremendous amount of time training to be able to compete successfully. Their huge volume of work leaves them near exhaustion and before major competitions, they have to find the best way to reduce fatigue while retaining fitness. Many studies have been done to help athletes and coaches decide on the best strategy.
Researchers at the University of Montreal compiled the results of 27 scientifically acceptable studies. They concluded that the best duration of tapering is two weeks, the optimum training volume reduction is by 40 to 60 percent, and the intensity of workouts should be maintained (Medicine & Science in Sports & Exercise, August 2007).
Training load during taper: Almost all of the studies agree that athletes should reduce the amount of work they do. While each athlete must decide on his optimal reduction, many bicycle racers drop from up to 400 miles a week down to fewer than 200, and many runners drop from above 100 miles to fewer than 40.
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Most athletes know all too well the intense feelings of fatigue and exhaustion that tend to follow intense workouts and training sessions. Frequent naps and long-night sleeps become common for the individual used to pushing their body to perform physical feats. But why exactly is it that strenuous workouts lead to such drowsiness while other forms of exercise can actually help boost our energy levels?
According to a recent article from The New York Times, this is one issue that is still unresolved. Though much research has been dedicated to the topic of sleep, there is a significant lack of studies on the effect intense exercise such as endurance running can have on an individual’s sleeping patterns.
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Need advice? Injured? Confused? Overwhelmed? Bored? ASK FLASH!
ASK FLASH is a free advice column to help you with all of your running, fitness and nutrition inquiries. To ASK FLASH — simply fill out the form at the conclusion of the column.
This week we briefly tackle the topic of running form…
Q. I was looking through my race photos and I noticed that a turning outwards of the ankle in a few photos– mainly the ones from the Capitol Hill classic (photo 1), which were taken immediately after a big long steep uphill. So, perhaps the hill had something to do with it. Both photos 2 & 3 are at the finish lines of marathons, which were relatively flat.
Another question is– If this ankle turn is a problem, does this make a difference for longer races? Or does it only affect shorter distances/sprints where every split second counts? ~Elizabeth from Virginia (Pictured)
A. Form is an interesting topic. In general, I believe it is important to minimize any body movements that are not working toward moving you forward in a comfortable and efficient manner. To that end, the fact that your ankle is turning significantly in two of the pictures that you sent me is some evidence that there is inefficiency in your stride. However, don’t let that discourage you …
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Are you digging for the doctor’s number more often lately? Aches and pains forcing you to miss workouts? If you suffer from nagging injuries it may be more than just a streak of bad luck holding you down; it may be your state of mind.
In a consensus statement issued last year by the American College of Sports Medicine, a team of doctors and sports psychologists discovered a link between psychological factors (mainly stress) and injury.
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In just the past month, I have had to travel on business to three different destinations on three separate occasions. This plethora of traveling has often made it difficult to run, but since I maintain an active racing schedule, I really can’t afford to have these trips impede on the 80-90 miles of weekly running required by my training program.
After my most recent trip, I returned home fatigued and endured a series of terrible runs on the ensuing days. I’ve been spending these trips sitting around a conference table, not hiking around or digging ditches, so it was not immediately clear to me why travel is so taxing on the body.
However, after serious reflection, I identified several reasons why traveling can be perilous to a running regimen:
Excessive intake of salt causes high blood pressure in some, but not all, people. High blood pressure increases risk for heart attacks, strokes, and kidney damage.
Why do some people develop high blood pressure when they take in a lot of salt, while others do not?
A recent study from the University of Minnesota shows that middle-aged people who start an exercise program lose their tendency to develop high blood pressure when they take in extra salt (Journal of Human Hypertension, May 2006).
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