Indiana University

Skip to:

  1. Search
  2. Breadcrumb Navigation
  3. Content
  4. Browse by Topic
  5. Services & Resources
  6. Additional Resources
  7. Multimedia News

IU Health & Wellness

Research and insights from Indiana University

Feb. 24, 2010

IU Health and Wellness for February discusses the following topics:

Training tips for the marathon and half-marathon
Spring break -- just a (crash diet) away
Peering through the looking glass: The reflection of body image


Poor planning can lead to disappointment and pain on race day.

Training smarter. Half marathons and marathons can be over in a matter of hours, but runners, both newbies and elite, often spend months training for the 13.1- and 26.2-mile races. Robert Chapman, director of the Human Performance Laboratory in Indiana University's School of Health, Physical Education and Recreation, and coach of Brook Team Indiana Elite, discusses four common mistakes runners make when preparing for these major races.

Mistake #1: Discounting the importance of the weekly long run. For the half-marathon and marathon, the weekly long run is one of the most important components of training. The adaptations that take place physiologically and psychologically during the long run are critical in helping the runner complete the race distance, as well as helping the runner achieve a goal time. Key adaptations that take place with the weekly long run:

  • Increased storage of muscle glycogen. Glycogen is the primary storage form of carbohydrates in the body, and the amount of glycogen the body can store is limited. In a typical person, there is enough glycogen present to fuel about two to three hours of moderate exercise. When glycogen stores get low or run out, the runner "hits the wall" and will struggle to finish the event. However, glycogen stores can increase as a result of training, and stores improve significantly as a result of including long runs each week.
  • Improved psychological ability to handle the race distance. With each weekly long run, there is an improvement in the runner's ability to mentally tolerate exercising for long periods of time.
  • Improved ability to absorb and tolerate the "pounding" the legs will take during the race. Feet, joints, tendons and muscles are all gradually strengthened over time from the overloading they receive from the weekly long run. Many runners who fail to finish a marathon do so because of leg pain and discomfort, resulting from the weight-bearing pounding over 26 miles.
  • Chapman recommends a long run once each week, starting early in training at about 20 percent of overall weekly volume. From there, athletes in the half-marathon should aim for a minimum long run distance of 8-10 miles, ideally completed at least twice before their race. Marathoners should aim for a minimum long run distance of 15 miles, completed at least twice before the race, with at least two long runs of around 20 miles being ideal.

Mistake #2: Selecting a race without considering the weather or lifestyle considerations for training. Most marathons are held in the spring or fall because of the milder temperatures in the Northern Hemisphere. Most experts recommend a training buildup of 10-16 weeks for most experienced runners prior to a marathon, perhaps a few weeks less for a half marathon. For athletes who select a spring race, this will mean completing a large portion of their training during the thick of winter -- where cold temperatures, snow and ice, and limited daylight hours can all have a dramatic effect on the quality of training and motivation for completion. Runners with work and family commitments, who have to train in early morning or evening hours, may find preparation for a spring marathon challenging. For athletes who select a fall marathon or half marathon, the bulk of the training load will come during the heat and humidity of summer. For most runners, training in extreme heat is more challenging than training in cold weather, where additional clothing can be worn. While it may be considerably easier to get runs in during early morning or late evening hours, summer is typically full of family vacations and weekend outings that can make sticking with a rigid training routine more difficult. In the end, when deciding on a marathon or half marathon, each runner should take a look not just at the time of the year of the race, but the logistics of how well they will be able to complete their training in the three to four months prior to the event.

Mistake #3: Failing to "practice" the race day routine. After weeks and weeks of training, many runners end up failing to finish or meet their goals -- often due to some simple, small detail that was overlooked regarding race day routine. Here are some examples:

  • Not being used to running in the early morning, when most races start.
  • Logistics such as bus departure for the race start, parking, proximity of race to hotel.
  • Breakfast decisions, such as what and when to eat.
  • Clothing, shoes, socks -- will they cause chafing or blistering?
  • Uncertainty about the sports drink provided by the race and whether it upsets runners' stomaches.
  • Shoe choice -- newer or older pair.

Many of these questions can be worked out during weekly long runs, such as clothing and breakfast choices. Runners also can contact race organizers for details about sports drinks and then try out the drinks during training. The weekly long run is not just an important component for training adaptations. It is also a great "dry run" for the race.

Mistake #4: Starting the race too fast. Three athletes who Chapman coaches qualified for the U.S. Olympic Marathon Trials and another won the Columbus Marathon in her debut at the distance. In all four cases, the athletes executed a "negative split" strategy -- where the second half of the race was faster than the first. Based on the paces completed in training, runners should have a strong idea of what pace they are capable of executing for the race distance, with slight modifications based on changing race day conditions such as weather. Once that pace is determined, Chapman recommends a conservative approach, especially if the goal is simply to finish the race. Even if a runner has a goal time in mind, a conservative, negative split approach will often lead to best performances, typically without the late race discomfort that normally accompanies a more aggressive pacing approach. Starting out at a conservative pace can often be a challenge with the excitement of the race start, the bands and music, and even fireworks that are present when the gun fires. However, the most common recipe for disaster in a marathon is going out too fast.

Chapman can be reached at 812-856-2452 and The Human Performance Laboratory is in the School of HPER's Department of Kinesiology. Top


The skinny on crash diets. Thoughts of spring break and warm sunny beaches often lead to thoughts of crash diets. "All diets can work initially, but crash diets are not good in the long run because they are not sustainable," said Bobbie Saccone, registered dietitian and nutrition counselor at the Indiana University Health Center in Bloomington. "You often end up gaining more than you lost in the first place." Crash diets, which typically involve severely reduced calorie intake, can have the following negative side effects: low energy, poor concentration, increased depression and irritability, and increased risk for binge eating. And ultimately, they can slow down your metabolism. Saccone said the calories we take in must equal the calories that we take out or burn. "The only way to lose weight is to disturb this balance and cause a calorie deficit." In one pound of body fat there are roughly 3,500 calories. Saccone gives the example that if one ate 250 less calories per day and burned 250 calories through exercise (total of 500 calories), then a person could lose about one pound per week. "A half to two-pound weight loss per week is an acceptable amount of loss, and it is more likely to stay off," she said.

Saccone offers the following alternatives to crash diets:

  • Decrease food intake and increase exercise. Just using exercise is not good enough for weight loss. According to Saccone, "exercise is good for maintaining weight but not necessarily for losing weight." When you exercise more you are usually hungrier later and tend to eat more. Good nutrition is also part of the equation.
  • Change certain habits. Think about habits that interfere with losing weight (grazing at night, choosing a restaurant without healthy options, not buying fruits and vegetables) and try to change them. Any type of change, even small changes can make a difference. It can be something as simple as using half the amount of salad dressing you normally use, eating one more piece of fruit or serving of vegetable every day, using one teaspoon less peanut butter on your sandwich, eating a few M&M's instead of a handful. Little changes do add up.

"In the case of weight loss, the tortoise really does beat the hare," says Saccone. "For permanent success, it's best to make small healthful changes in diet and exercise and stick with them so they develop into your regular habits."

Saccone can be reached at 812-855-7338 and Top

mirror photo

Do these jeans make me look fat? In the U.S., 75 percent of adult women and 54 percent of adult men are dissatisfied with their appearance. Chris Meno, psychologist at the Indiana University Health Center in Bloomington, said many studies involving eating disorders have identified poor body image and disordered eating, such as chronic dieting, over-exercise, occasional binge eating, vomiting or use of diet or weight loss pills, as risk factors for dieting and the development of eating disorders in both women and men. Of college-aged women, 40 percent to 60 percent have concerns about disordered eating and body image. Why are so many men and women unhappy with their appearance? Meno said it may be due to Western culture's constant chatter about weight loss and obesity, the idealization of thinness, and the implied message that in order to be "attractive," one should resemble those who grace the pages of fashion and fitness magazines. There have been studies showing that within minutes of viewing these idealized images, women experience body dissatisfaction, guilt, and feelings of stress and depression. It should be noted that men also report greater body dissatisfaction after viewing athletic or muscular images just one time.

DeeDee Dayhoff, clinical social worker with Counseling and Psychological Services at the IU Health Center, offers the following tips on how to become comfortable with your body image:

  • Limit/stop your "fat talk." Examples of fat talk include: "I hate how fat these jeans make me look." "I can't believe I just ate all of that for lunch." Fat talk is "toxic chatter" and erodes self-esteem.
  • Resist engaging in fat talk about others. This includes making critical comments about the way that others look.
  • Work on developing a more accepting and positive attitude about your body. Every day, you can make an effort to name something that you appreciate or that your body helps you do.
  • Develop a more critical eye and ear about negative messages conveyed in the media. Don't allow the media to control your self-esteem or perception of your body image; think critically about what the advertisement is trying to sell you or what distorted messages about appearance are being projected.
  • Get rid of all of your "skinny jeans" or any clothing, magazines or scales that make you feel you have to diet to fit into them. Wear clothing that is comfortable and that makes you feel great about the body that you do have.

For more information about body image or to seek help, contact the IU Health Center at 812-855-5002, Counseling and Psychological Services (CAPS) at 812-855-5711 or Health & Wellness Dietitians at 812-855-8230. To learn more about COPE, visit Top

For additional assistance with these items, contact Tracy James at 812-855-0084 or, or Ashley Davidson at