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  • Title: Upper arm circumference is associated with race performance in ultra-endurance runners.
    Author: Knechtle B, Knechtle P, Schulze I, Kohler G.
    Journal: Br J Sports Med; 2008 Apr; 42(4):295-9; discussion 299. PubMed ID: 17599951.
    Abstract:
    OBJECTIVE: To investigate the association of anthropometric parameters to race performance in ultra-endurance runners in a multistage ultra-endurance run. DESIGN: Descriptive field study. SETTING: The Deutschlandlauf 2006 race in Germany, where athletes had to run 1200 km within 17 consecutive days. There were no interventions. SUBJECTS: In total, there were 19 male Caucasian ultra-endurance runners (mean (SD) 46.2 (9.6) years, 71.8 (5.2) kg, 179 (6) cm, BMI 22.5 (1.9) kg/m(2)). MAIN OUTCOME MEASUREMENTS: Determination of body mass, body height, length of lower limbs, skin-fold thicknesses, circumference of limbs, body mass index (BMI), percentage skeletal muscle mass (%SM), and percentage body fat (%BF) in 19 successful finishers in order to correlate anthropometric parameters with running performance. RESULTS: A significant association of upper arm circumference with the total running time was found (p<0.05, r2 = 0.26). No significant association was found with the directly measured anthropometric properties body height, body mass, average skin-fold thickness and the circumference of thigh and calf (p>0.05). Furthermore, no significant association was observed between the running time and the calculated parameters BMI, %BF, and %SM (p>0.05). CONCLUSIONS: In an ultra-endurance run over 1200 km within 17 consecutive days, circumference of the upper arm was the only factor associated with performance in well-experienced ultra-endurance runners. Body mass, BMI, body height, length of limbs, skin-fold thicknesses, circumference of limbs and the calculated percentage body composition of skeletal muscle mass and body fat showed no association with running performance.
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