Want to quit your junk-food addiction? Tie up your shoes and hit the gym.

Scientists from the University of Texas in Austin have discovered that periodic exercise can change individuals to make healthier decisions about their food choices in general..

The research, written in the International Journal of Obesity, tracked 2,680 grown-ups who neither worked out frequently nor followed a diet.

Following 15 weeks of regular aerobic exercises, the researchers described that the once-lazy attendants were more inclined to choose fruit and vegetables over fried stuff and soft drinks.

“People often think that if you start exercising, [you] will feel more hungry and you will offset your work,” Molly Bray, head of UT’s department of nutritional sciences and lead author of the research, informs The Post. “But the data doesn’t support at all . . . There is a nice consequence of being physically active.”

Attendants aged 18 to 35 exercised intensely for 30 minutes on exercise bikes, treadmills or cross-trainer three times each week.

They were told to not change their diet — but the researchers found that their appetite instinctively moved from the fast food counter to the produce lane.

“I think it’s a combination of conscious and unconscious,” says Bray about the change of diet. “They find they are more capable than they thought, and it enables them to make other healthy changes.”

Although the research doesn't say why the change occurs, she assumes it's feasible that the natural effect of exercise counts as well, particularly on the grounds that exercising can build "feel-good" chemicals in your head, for example, dopamine or serotonin.

The results are recognized by 39-year-old Jacob Harb, who left a wandering filled career as a Porsche executive to open a restaurant, Yara, in Midtown.

Not working out “starts to infringe on your decision making,” says the Hell's Kitchen inhabitant, who says he ended up munching on chips when he couldn't include his exercises.

“There were weeks that I had to force myself to the gym to get back on track.”

At present, his hours are less hectic. Harb feels that it is less demanding to stick to his normal everyday practice — yoga, running and weight lifting — and to his Mediterranean-oriented eating regimen.

“It’s good to have this validated with research,”

says Harb.

Bawl says the discoveries should alter how we, as a general public, think about nourishment and general health.

“People focus a lot on dieting and deprivation,” says Bray. “I think if you said, ‘Introduce this aspect into your routine,’ rather than, ‘Take this aspect away from your life,’ it might resonate more.”