Person running on treadmill (left) Joseph Antoun (left)
Dr. Joseph Antoun walks as much as possible.
  • Dr. Joseph Antoun, the CEO of a longevity company, shared his workout schedule. 
  • Muscle loss after age 40 can lead to a slower metabolic rate, weight gain, and health issues, he said.
  • To stay healthy, Antoun walks 10,000 steps daily and does cardio and strength training. 

A doctor and CEO of a longevity-focused nutrition company who views movement as one of the pillars of healthy aging shared his workout routine with Business Insider.