Boys who are too active Weight gain A study shows that boys are not at greater risk during puberty of dying from heart disease later in their lives. overweight When they are younger and have normal weight throughout adolescence. The study examined the impact of BMI on two distinct developmental periods, childhood and adulthood. puberty Adult men are at greater risk of cardiovascular death. It seems that excessive BMI increases during puberty are a risk factor. Unhealthy . “In this study we show that a significant increase in BMI during puberty was particularly important. However, high BMI at eight years old is not associated with increased cardiovascular mortality,” Jenny Kindblom (Associate Professor, University of Gothenburg), Sweden. The study found that boys with a BMI greater than seven have higher risks. BMI units during puberty. This group has a 22 percent higher chance of dying from cardiovascular disease later in their lives if they have an extra BMI unit. The study was published in The Lancet Diabetes & Endocrinology.