RT Journal Article SR Electronic T1 C34T mutation of the AMPD1 gene in an elite white runner JF British Journal of Sports Medicine JO Br J Sports Med FD BMJ Publishing Group Ltd and British Association of Sport and Exercise Medicine SP e7 OP e7 DO 10.1136/bjsm.2005.019208 VO 40 IS 3 A1 A Lucia A1 M A Martin A1 J Esteve-Lanao A1 A F San Juan A1 J C Rubio A1 J Oliván A1 J Arenas YR 2006 UL http://bjsm.bmj.com/content/40/3/e7.abstract AB The case is reported of an elite, male, white endurance runner (28 years of age), who is one of the best non-African runners in the world despite carrying the C34T mutation in the gene (AMPD1) that encodes the skeletal muscle specific isoform of AMP deaminase, an enzyme that plays an important role in muscle metabolism. The frequency of the mutant allele in sedentary white people is 8–11%. Previous research has shown that this mutation, at least in homozygotes, can impair the exercise capacity of untrained people and their trainability. The maximum oxygen uptake of the study subject was exceptionally high (83.6 ml/kg/min), whereas his ammonia and lactate concentrations at high submaximal running speeds were lower than those of other world class runners who are not carriers of the mutation. The partial metabolic deficiency of the study subject is possibly compensated for by his exceptionally favourable anthropometric characteristics (body mass index 18.2 kg/m2).