From the article:

Researchers found that total cholesterol, LDL cholesterol and triglycerides all increased up to a certain age and then decreased while the inverse was true for HDL, known as “good” cholesterol. Men with lower cardiorespiratory fitness had a higher risk of developing high cholesterol in their early 30s while men with high fitness did not see this development until their mid-40s. Additionally, men with low cardiorespiratory fitness reached abnormal HDL and non-HDL cholesterol levels around their early 20s and mid-30s, respectively, while those with higher fitness saw normal amounts for the entire lifespan.