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Citius and longius (faster and longer) with no alpha- actinin-3 in skeletal muscles?
  1. Alejandro Lucia (alejandro.lucia{at}uem.es)
  1. Universidad Europea de Madrid, Spain
    1. Jesús Oliván (jesus.olivan{at}uem.es)
    1. Universidad Europea de Madrid, Spain
      1. Félix Gómez-Gallego (felix.gomez{at}uem.es)
      1. Universidad Europea de Madrid, Spain
        1. Catalina Santiago (catalina.santiago{at}uem.es)
        1. Universidad Europea de Madrid, Spain
          1. Marta Montil (marta.montil{at}uem.es)
          1. Universidad Europea de Madrid, Spain
            1. Carl Foster (foster.carl{at}uwlax.edu)
            1. Department of Exercise and Sport Science, University of Wisconsin-La Crosse, La Crosse, WI, United States

              Abstract

              The muscle protein alpha-actinin-3 (ACTN3) is normally thought to be expressed in type II muscle fibres and to be necessary for high-power, high-velocity muscle contractions, such as those typically seen in speed/power athletes. We report the case of a Spanish elite long jumper (two times Olympian, personal best of 8.26 metres) whose genotype for the ACTN3 gene is 577XX, i.e., ACTN3 deficient. These data suggest that there might be notable exceptions to the concept that ACTN3 is the ‘gene for speed’.

              • ACTN3
              • fibre type
              • genetics
              • long jump
              • performance

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