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Ferro, D.A. (author), Deijen, J.B. (author), Koppes, L.L. (author), van Mechelen, W. (author), Twisk, J.W. (author), Drent, M.L. (author)Background: Physical activity and fitness in adolescence may improve cognition in adulthood by increasing insulin-like growth factor I (IGF-I). Methods: As part of the Amsterdam Growth and Health Longitudinal Study, following subjects from age 13 to 42 years, physical activity and fitness of 303 subjects were assessed annually between the ages...article 2016
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van Turenhout, E.C. (author), Deijen, J.B. (author), Koppes, L.L.J. (author), van Mechelen, W. (author), Twisk, J.W.R. (author), Drent, M.L. (author)The present study explored sex-and age-related interactions of IGF-I polymorphisms with IGF-I serum levels. In 2000 data on IGF-I promoter polymorphism and IGF-I level were available of 344 (mean age 36; 162 men) and 6 years later in 287 subjects (133 men). As the sample sizes of groups of subjects with IGF-I genotypes 192/192, 190/192, 192/194...article 2011