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What the Father of Aerobic Exercise Wants You to Know About Healthy Aging

5 keys to staying fit and why you can’t skip strength training


Kenneth Cooper
Courtesy Ron Jenkins/Sunwest Communications

Key takeaways

  • Staying physically active at every age is essential for optimal health, according to Dr. Kenneth Cooper, the “father of aerobics.”
  • He emphasizes combining aerobics with strength training, especially as muscle loss increases later in life.
  • Cooper prioritizes sleep, diet, supplements as needed, weight measures beyond BMI and yearly exams to support longevity.

If you believe your days of aerobics are behind you, think again. According to Dr. Kenneth Cooper, who pioneered aerobics for improving health, remaining physically active is critical for combating diseases and driving healthy aging. And he should know, because at age 95, he still works out five days a week. 

“No drug can replace the effects of an active lifestyle,” says Cooper, a preventive medicine doctor and researcher who regularly sees patients at the Cooper Clinic in Dallas. 

An Oklahoma native, Cooper was active as a boy and ran track in high school (he had Olympic aspirations). At the time, many experts thought too much heart-pumping movement could have adverse effects on health and specifically the heart.

Support for Staying Active

If you can use a professional trainer to learn some basics about physical activity, Cooper recommends it. He’s a fan of muscle activation technique (MAT) specialists, who can pinpoint issues with your muscles, including weakness and tightness. If you can work out only at home, there’s a lot you can do with light weights and resistance bands, he adds.

But Cooper didn’t always maintain his physical fitness, especially when attending the University of Oklahoma School of Medicine. He was out of shape in his late 20s and experienced chest pains, though nothing was wrong with his heart. “At 29 years of age, I was a mess,” Cooper recalls.

He took up running in the early 1960s while working toward a master’s degree in public health at the Harvard School of Public Health. He says it was then that he learned more about preventing diseases, not just treating them.

In the mid 1960s, he completed the aerospace medicine residency program and began developing an exercise conditioning program for the Air Force at Wilford Hall U.S. Air Force Hospital in San Antonio. There, he formulated the 12-minute and 1.5-mile fitness treadmill tests, which are used widely today among coaches and trainers. He wrote his first book, Aerobics, in 1968, which became a global movement. In 1989, Cooper and colleagues published a landmark study that used the treadmill test to show that the higher a person’s fitness level, the lower their mortality risk, especially from heart disease and cancer.

In his 20th book, Grow Healthier as You Grow Older, Cooper writes that in the military, he began dreaming of a preventive medicine clinic. Today, thousands visit the 30-acre Cooper Clinic campus in Dallas — complete with a hotel, gym and spa — to undergo extensive one-day testing. This helps people understand how to improve their mental and physical health with exercise, naturally, at the core.

Dr. Kenneth Cooper, the father of aerobics, exercising
Dr. Kenneth Cooper exercises about five times per week.
Courtesy Ron Jenkins/Sunwest Communications

How Cooper works out

“Fitness is a journey, not a destination,” Cooper says. Before he goes home from work at night, he spends 30 minutes pedaling on a recumbent bike while watching TV, pushing his heart rate to about 130 beats per minute using a heart rate monitor. He also does about 10 minutes of weight training three times a week. And he walks his dog about 15 to 20 minutes per day.

“I use exercise at the end of the day to burn off stress,” says Cooper, adding that it helps him sleep better.

Though he’s known for aerobic training, Cooper says strength training is just as vital, especially to compensate for age-related muscle loss.

He’s focused on maintaining muscle, not building it, he says. Cooper’s weight training routine includes walking with a kettlebell in one arm as if carrying a suitcase, standing rows, chest presses, squats, a banded two-arm row and banded hip bridges. On weight machines, he completes chest and leg presses, rows and crunches. He also balances on one leg at a time and steps from side to side. He completes two sets of 20 repetitions.

For people 51 to 60 years old, about 40 percent of a workout should be strength training and the rest, aerobics; that should increase to 45 percent strength training for people over 60, he says.

Staying fit without a gym

Can’t get to a gym but still want to stay fit? In addition to walking, Cooper recommends these exercises:

  • Walk holding a weight, similar to the kettlebell move above.
  • Sit in a chair and stand up.
  • Stand and extend your leg away from the side of your body.
  • Stand and bend your knee, curling your heel to your glute.
  • Hold a plank on the edge of your bed.
  • Lift your knees high when walking.

Cooper’s keys to healthy aging

Dr. Kenneth Cooper works out
Dr. Kenneth Cooper, 95, known as the "father of aerobics" works out.
Courtesy Ron Jenkins/Sunwest Communications

These are priorities to improve your health and longevity, according to Cooper.

1. Get your heart pumping. If you keep moving at every age, that will support healthy aging, Cooper says. “You’re never too old to get started,” he says. Begin with light walking, swimming or cycling, and vary your exercise program as much as possible so it becomes a habit.

Don’t worry about reaching a specific heart rate. Instead, use the talking test to gauge your intensity — aim for being able to speak comfortably while exercising but still feeling challenged, he says.

2. Diet matters. Eat at least five fruits and vegetables per day. What you don’t consume is just as vital, he says, pointing to the dangers of drinking, especially in excess.

“I don’t eat much red meat,” says Cooper, who likes fish — mainly salmon — and has that one day a week. Reducing sugar intake is also important for optimal health, he says. 

For breakfast, he typically has half a grapefruit, oatmeal with blueberries, or half a muffin and one soft-boiled egg. Lunch is usually a cup of soup with vegetables. Dinner is often fish or chicken with potatoes, spinach, green beans or other vegetables, occasionally grilled with olive oil and sea salt. Cooper isn’t into desserts, but he does enjoy a chocolate chip cookie or banana pudding now and then.

3. Pay attention to your weight. Your doctor may talk to you about your body mass index (BMI), but Cooper says waist circumference — or body roundness index (BRI) — is a better measure of health, though you can use both. BRI gauges belly fat, which is linked to cardiovascular disease, cancer and other diseases. Once your waist is within acceptable limits, your weight will be good, he says.

4. Use supplements for support if needed. Cooper is a big believer in taking vitamins and supplements as directed by a doctor. He is especially enthusiastic about vitamin D, which he believes helped him overcome two bouts of COVID-19 (the Omicron variant) while experiencing only a headache. The connection is well-researched: A 2023 meta-analysis of 58 clinical studies linked ample vitamin D levels to less-severe illness.

5. Get a yearly physical exam. Cooper is a staunch supporter of annual exams. Your doctor should look at your BMI and waist circumference, while also measuring your blood pressure. Lab work should include testing for diabetes and cholesterol levels, and pay attention to C-reactive protein (a marker of inflammation), which is linked to many diseases, he adds. A treadmill test can give you a better glimpse of your health, as it can detect heart disease before symptoms arise. Men should have a prostate cancer screening, he adds.

Staying fit for the future

Cooper hopes more older adults will start being more physically active — and for those who already are, that they will stay that way regardless of age.

“You can get healthier as you get older,” he adds.

Jon Krause

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The key takeaways were created with the assistance of generative AI. An AARP editor reviewed and refined the content for accuracy and clarity.

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