För den som vill förkovra sig så gjordes det en studie på ultralöpare för inte så länge sedan där man kom fram till att fettprocenten allena inte påverkade resultatet, däremot "However, higher body mass and having a larger upper arm circumference were both associated with slower finish times"
"More weight to carry around will slow you down, especially in your upper body, where strong, powerful muscles don’t “carry their own weight” like strong legs do.
Notably, calf or thigh circumference were not associated with slower race times.
The findings concerning upper-arm circumference were in agreement with an earlier study by several of the same researchers. In that study, the researchers used a similar protocol, measuring nineteen male finishers of a 750-mile, 17-day race across Germany.2"
Så helst så lite massa som möjligt över armar, rygg, bröst, låg fettprocent och sedan bra ben. Nejtack, jag får vara en kass löpare istället.
edit: här är referenserna om man vill plöja studier;
Knechtle, B.; Duff, B.; Welzel, U.; Kohler, G., Body Mass and Circumference of Upper Arm Are Associated With Race Performance in Ultraendurance Runners in a Multistage Race—The Isarrun 2006. Research Quarterly for Exercise and Sport 2009, 80 (2), 262-268.
Knechtle, B.; Knechtle, P.; Kohler, G., Upper arm circumference is associated with race performance in ultra-endurance runners. British Journal of Sports Medicine 2008, 42, 295-299.
Knechtle, B.; Wirth, A.; Knechtle, P.; Zimmermann, K.; Kohler, G., Personal best marathon performance is associated with performance in a 24-h run and not anthropometry or training volume. British Journal of Sports Medicine 2009, 43, 836-839.
Knechtle, B.; Knechtle, B.; Rosemann, T.; Lepers, R., Predictor variables for a 100-km race time in male ultra-marathoners. Perceptual and Motor Skills 2010, 111 (3), 681-693.
Knechtle, B.; Knechtle, P.; Rosemann, T.; Senn, O., What is associated with race performance in male 100-km ultra-marathoners – anthropometry, training or marathon best time? Journal of Sports Sciences 2011, 29 (6), 571-577.