For 10 years, Miller has maintained a 40 pound weight loss, but Lee got a shock at his yearly checkup.
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"I had gone to a physical and had blood work done and came back with higher blood sugar levels than were good," Miller said.
The man who used to train for triathlons, was diagnosed with pre-diabetes and he worried that full-blown diabetes could be next.
Dr. Joshua J. Joseph of Ohio State University Wexner Medical Center and his colleagues assessed the heart health of more than 7,000 people who did not have diabetes.
The researchers then used the American Heart Association's measure of heart health, called Life's Simple Seven.
For starters, did they have blood pressure of less than 120 over 80? Fasting glucose less than 100, total cholesterol less than 200, and BMI of less than 25? Did they exercise for 150 minutes a week and eat well with two servings of fish weekly? Finally, if they had ever smoked, did they quit?
"People who had four or more of those compared to 0-1, had a 70-80 percent lower risk of diabetes over 10 years," Joseph explained.
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Miller did develop diabetes, but believes shedding about 20 more pounds and increasing his exercise again could be the key to keeping the symptoms under control.
"My doctor feels if I can get there, I may have a chance with exercise," he said.
Miller says he has cut out all soda and limits his carb intake to 45 grams per meal. He's also planning to start training for a triathlon again as motivation.
In addition to the other heart-healthy recommendations for preventing diabetes, Joseph suggests limiting sugar-sweetened beverages to only 36 ounces or less every week.