Li Ming was a retired woman who enjoyed working in her garden. Even the unusual heat wave that hit her region one summer didn’t deter her from tending her flowers and other plants. The temperature rose above 100 degrees Fahrenheit, and the humidity teetered at 90 percent. On the third day of these record-breaking temperatures, Li Ming called her daughter, Kim, but she sounded confused on the phone. Kim became alarmed and rushed to Li Ming’s house, where she found her mother lying on the kitchen floor unconscious. Apparently Li Ming’s large fan wasn’t enough to fight the effects of the heat and humidity, and she suffered heatstroke, which can be life-threatening.1

One can lower the risk of heat-related illness, such as heatstroke, by drinking plenty of liquids, particularly water. Next to air, water is the most vital element needed for survival. By weight, a newborn infant is approximately 75 percent water, and an adult about 70 percent.

The gray matter of the brain is approximately 85 percent water, blood is 83 percent water, muscles are about 75 percent water, and even hard marrow bones are 20 to 25 percent water.2 Almost every cell and tissue of the body not only contains water but is continually bathed in fluid and requires water to perform its functions.

Water, the liquid of life, is a medium in which metabolism takes place. It is:

About two thirds of the water our body requires come from ingested liquid, about one-third from our food, and a small amount of liquid is synthesized during food metabolism. Fruits and vegetables generally have higher water content than other food groups.

Ideally the body maintains a balance between the amount of water lost each day and the amount taken in to replace it. The amount of water lost each day depends on climatic conditions and physical activities.

What if Water Intake Is Inadequate?

When we don’t provide our bodies with enough water, they attempt to avoid dehydration by decreasing sweat and urine output. If this compensatory mechanism proves inadequate and insufficient fluid intake persists, dehydration occurs. Dehydration causes an impairment of the body cooling mechanisms, along with a possible rise in body temperature and an inefficient clearance of body waste. The blood thickens and blood flow becomes impaired, increasing the risk of intravascular clotting. This may manifest as stroke or heart attack. Drinking an inadequate amount of water also increases the risk of developing kidney stones and gallstones. It’s estimated that adequate hydration of older people could save thousands of days of hospitalization and millions of dollars each year.

Insufficient water intake also leads to constipation, to the delight of the laxative industry. Exercise and fiber intake play a role as well.

How Much Water Is Needed?

In a healthy person, a practical guide to water intake is to consume sufficient amounts throughout the day to ensure that the urine is a pale color. (Urine may be a bright-yellow color after taking certain medications, including vitamin pills.)

Begin drinking water in the morning, because the body is relatively dehydrated from insensible (invisible) perspiration during sleep. Then continue to drink water at regular intervals throughout the day.

Be sure to drink water that is pure and clean.It is the most healthfully beneficial liquid we can consume.

Water as a Cleansing Agent

Another important use of water is cleansing. Regular bathing removes accumulated dirt and contaminating debris, reducing the risk of infection.

Frequent hand washing may reduce transmission of many infectious agents from person to person.


Hydrotherapy is the use of water as a simple home therapeutic application. It’s best applied as a help for simple muscular aches, pains, and bruises. When dealing with muscular aches, apply hot, wet towels alternated with cold, wet towels (ending with a cold application) to affected areas to improve blood flow. If recent injury and bruising have occurred, cold compresses are more appropriate.

Appropriate Concern for Earth’s Inhabitants

Water is a precious and indispensable resource. It’s therefore important to conserve it:

  1. Avoid wasting water. When possible, install toilets and showerheads in your home that use less water. When brushing your teeth, turn on the water taps only to wet and rinse your toothbrush; turn taps off while brushing your teeth. Repair leaking faucets.
  2. Avoid polluting water. Water can be polluted by human excrement, industrial waste, and chemicals. Animals raised in large agricultural feed-lot operations consume huge quantities of water, and their excrement has the potential to pollute groundwater and nearby rivers and streams. Eating a vegetarian diet helps to conserve water, because foods consumed in a plant-based diet require much less water to produce.

Water of Life

Life cannot exist without water. All body functions require it. Similarly, in our spiritual lives, we cannot live eternally without the Water of Life—Jesus Christ.

May we be transformed as we drink, bathe, and are soaked in His compassion, love, and acceptance.

  1. U.S. Department of Health and Human Services, National Institute on Aging, “Hyperthermia,” Accessed online Apr. 4, 2012.
  2. M. G. Hardinge, A Philosophy of Health (Loma Linda University School of Public Health, 1980), p. 37.

Kathleen Kuntaraf, M.D., M.P.H., now retired, was an associate director of the General Conference Health Ministries Department.

At age 91 Grace was still active playing tennis, lifting weights, and walking. Fifty-one years before, however, at the age of 40, her condition had been very different. Grace’s spine was badly injured during a ski accident that occurred at the time, and as the years passed her back pain intensified. Her physician told her that he couldn’t do much to help her because she was “too old.” Grace later was diagnosed with emphysema and had difficulty breathing.

Grace, however, had a strong will to recover and decided to try an exercise program offered at a local medical center. For six weeks she worked out three times a week, two to three hours a day. She lifted weights, walked on a treadmill, rode a stationary bicycle, and did breathing exercises. Even when she was in pain and didn’t feel like doing anything, she didn’t quit. Eventually her breathing improved and the back pain disappeared. She was able to walk reasonable distances—and had energy to spare! Her doctor told her that he had never seen such progress in anyone her age. Grace attributes her health improvement to exercise.1

Benefits of Physical Exercise

Regular exercise is not only a preventive measure; it also works to maintain health at its best. Studies clearly demonstrate that participating in regular physical activity provides many health benefits, including improved cardiorespiratory and muscular fitness, improved bone health, reduced symptoms of depression, lower risk of coronary disease and stroke, and lower risk of type 2 diabetes, among many others.

Studies show that people who are physically active for approximately seven hours a week have a 40 percent lower risk of dying prematurely than those who are active for fewer than 30 minutes a week.

Heart disease and stroke are two of the leading causes of death worldwide. Studies show that a significant reduction in the risk of cardiovascular disease occurs at activity levels equivalent to two and a half hours a week of moderate-intensity physical activity.

The decline in bone density during aging can be slowed with regular physical activity. Research studies of physical activity to prevent hip fracture show that participating in two to five hours of physical activity per week of at least moderate intensity is associated with reduced risk.

Metabolic syndrome is a condition in which people have a combination of high blood pressure, abdominal obesity, an adverse blood lipid profile (low levels of high-density lipoprotein [HDL] cholesterol, raised triglycerides), and impaired glucose tolerance. Studies have shown that people with metabolic syndrome respond to persistent, regular physical activity; a restrictive diet; and appropriate medications.2 Other studies show that those who engage regularly in moderate-intensity aerobic activity have a lower risk of developing type 2 diabetes than do inactive people.

Research shows that within a year it’s possible to achieve weight stability through two and a half to five hours per week of walking at a pace of about four miles per hour.

If you want to postpone your funeral, exercise regularly!

Three Types of Physical Activities:

Physical exercises are generally grouped into three types3 and have different effects on the body:

Flexibility exercises, such as stretching, improve the range of motion of muscles and joints.4

Aerobic exercises, such as cycling, swimming, and walking, focus on increasing cardiovascular endurance.5

Resistance exercises, such as weight training, increase muscle strength6 and lower or prevent bone loss associated with menopause.7

The Best Physical Activity

Dr. Kenneth Cooper, of Aerobics fame, promotes brisk walking rather than running or jogging. Walking can be done almost any time or place, and enjoyed alone or with friends. Comfortable walking shoes and clothing are all that is needed. Brisk walking exercises most muscles and systems of the body. It stimulates the release of endorphins, which elevate the mood and improve one’s outlook on life.

More than 150 years ago Ellen G. White said, “Walking, in all cases where it is possible, is the best exercise, because in walking, all the muscles are brought into action.”8

Exercising Faith

As regular aerobic exercise helps us live better, so it is with the exercise of faith. We can trust God to lead our lives according to His loving prescription for health.

  1. “An Exercise Story,” Accessed online Apr. 4, 2012.
  2. “Effect of Physical Activity and Diet on the Treatment of Metabolic Syndrome,” Accessed Apr. 20, 2012.
  3. “Your Guide to Physical Activity,” Accessed online Apr. 4, 2012.
  4. D. O’Conner, M. Crowe, W. Spinks, “Effects of Static Stretching on Leg Capacity During Cycling,” Journal of Sports Medicine and Physical Fitness 46, no. 1 (2006): 52-56.
  5. J. Wilmore, H. Knuttgen, “Aerobic Exercise and Endurance: Improving Fitness for Health Benefits,” The Physician and Sports Medicine 31, (2003): 45. Retrieved Oct. 5, 2006, from ProQuest Database.
  6. N. de Vos, N. Singh, D. Ross, T. Stavrinos, et al., “Optimal Load for Increasing Muscle Power During Explosive Resistance Training in Older Adults,” The Journals of Gerontology 60A, no. 5 (2005): 638-647. Retrieved Oct. 5, 2006, from ProQuest Database.
  7. WebMD, “Resistance (Strength) Training Exercise,” Nov. 10, 2010, Accessed online Apr. 4, 2012.
  8. Ellen G. White, in The Health Reformer, July 1, 1872.

Kathleen Kuntaraf, now retired, was an associate director of the General Conference Health Ministries Department.