Sports Medicine
A Crucial Period
Good Pain, Bad Pain
On Your Knees
Secondary Injuries
Imaging Technology
What's Sciatica?
The Female Athlete
Putting Your Feet First
Itis Schmitis
Too Much, Too Soon
Under the Influence
What's Goin' On?
Think Inches, Not Pounds
Preventing Vaginitis
That Painful Pull
Athlete's Heart
Exercise & Arthritis
Chilled to the Bone
Measuring Body Fat
Exercise and Your Breasts
Choosing a Sports Doctor
Lean on Me (Shoulder)
Exercise & Anemia
Exercise Abuse
Pelvis Sighting
Hand Aid
It's All in the Wrist
Back in Action
Altitude Adjustment
Tennis Elbow, Anyone?
Exercising in the Heat
Agony of the Feet
Restless Legs
Night Time Cramps
Birth Control Concerns
No Periods, No Babies?
Post Partum Prescription
Weight Loss Mystery
Undesirable Cooldown
To Brew Or Not To Brew
Fitness After Baby
Biking and Back Pain
Swimmer's Shoulder
A Hidden Athlete
Avoiding Osteoporosis
Drug Testing
Maximum Heart Rate
Headway Against Headaches
Torn Rotator Cuff
Fat Figures
Bloody Urine
Sag Story
Lackluster Leg
Bothersome Bulge
Gaining in Years
Taking It On the Shin
Aching Ankles
Hoop Help
Tender Toes
Meals For Muscle
Growing Pains
Hot Tips
High Altitude PMS
Personal Bests
Air Pollution
Ankle Blues
Heartbreak Heel
Yeast Relief

Exercising in the Heat

Hyperthermia can take the fun and health out of summer exercise.

Hot weather exercising can do more than make you hot, tired and thirsty. Many of us remember the gruesome sight of Andersen-Schiess stumbling to the marathon finish line in the 1984 Los Angeles Olympics, suffering from hyperthermia.

Serious heat illness is even more likely to strike those who push their endurance and are not as well conditioned as Olympic marathoners.

Exercising in warm weather is safe if you know how to manage your exercise program and adjust your workout to the conditions.

While exercising you are exposed to both external and internal heat. External heat comes from the combination of environmental temperature and humidity - the heat index.

Humidity increases the effect of heat by limiting the effectiveness of sweat evaporation to cool you. Heat radiation from certain surfaces such as pavement, concrete or sand may make you feel hotter.

During intense exercise, muscle activity increases internal heat production 15 to 20 times more than at resting levels. Exercise intensity and duration, body size and shape, fitness level, acclimatization, state of hydration and type and color of clothing also affect internal heat production.

The body's "thermostat," located in the hypothalamus of the brain, senses any rise in body temperature and sends signals to dilate sufface blood vessels, increase respiratory rate and begin sweating. About 85 percent of heat loss is caused by the evaporation of sweat. Adequate hydration is the key to your body's ability to cool itself by sweating.

Heat illness occurs when the body produces more heat than it can dissipate. Most often this happens when dehydration accompanies excessive heat production.

Severity progresses as described below; from the mild stages of heat cramps and heat fatigue through more serious heat exhaustion to heat stroke, which can be fatal. See the next page for description of the various stages of heat illness.

Next | 1 | 2 | 3 | 4 |

Order Now!
Order The Athletic Woman's Survival Guide
Table of Contents

Foreword: Billie Jean King

Comments by Barb Harris
Editor in Chief,
Shape Magazine

General Health
Common Medical Problems
Dental Health
Infectious Disease
Sexual Health
Emotional Well-Being
Eating Disorders
Alcohol & Other Drugs
Environmental Health

The information in this web site is for educational purposes only and is not providing medical or professional advice. It should not be used for diagnosing or treating a health problem or disease. It is not a substitute for professional medical care. If you have or suspect you might have any health problems, you should consult a physician.

Copyright 2000 - Sports Doctor, Inc.