Although childhood physical fitness seems to reveal some inverse associations with obesity and blood pressure in early adulthood, these effects diminished markedly into middle age. This is found in a long long study from Norway. Follow-up data were collected for 1016 teenagers in 1991, 1999 and 2006. Fiste measurement was in 1981. At baseline, physical fitness was inversely related to BMI, triceps skinfold thickness, and blood pressure. These associations were also present in prospective analyses at ages 15, 25 (except for systolic blood pressure), and 33 years (only BMI measured) – albeit with progressively diminishing magnitude and lost at age 40.