a long duration of time. when were the people in that study first weighed? and was there a trigger for them? >> this was a huge cohort. researches asked people what did they weigh for when women were 18-year-olds and men 21 years old. they were talking about when their first entered adulthood, they weren't that old. but by the time they hit 55, that's what when they noticed these health consequences with weight gains. the more weight gain, the higher risk of disease. >> that all being said, don't wait until you're 40 or later to start making a change when we start seeing the pounds pile up. thank you so much. got to leave it there. really nice to meet you. >> you too. join kira phillips for her recordings of detective mark