Nyt løbestudie med en uheldig forsøgsprotokol
21. Feb, 2013 af Ole Stougaard

Nyt løbestudie med uheldig forsøgsprotokol

Jeg faldt i dag over et nyt løbestudie i Medicine & Science in Sports & Exercise.

Her undersøger de endnu en gang forskellen mellem forfodsløb vs hællanding.

I dette studie adresserer de løberelaterede lændeproblemer, og om hvorvidt en ændring fra hællanding til forfodsløb, kan mindske lændeproblemerne.

Purpose: Barefoot running (BF) is gaining popularity in the running community. Biomechanical changes occur with BF, especially when initial contact changes from rearfoot strike (RFS) to forefoot strike (FFS). Changes in lumbar spine range of motion (ROM), particularly involving lumbar lordosis, have been associated with increased low back pain. However, it is not known if changing from RFS to FFS affects lumbar lordosis or low back pain. The purpose of this study was to determine whether a change from RFS to FFS would change lumbar lordosis, influence shock attenuation, or change comfort levels in healthy recreational/experienced runners.

Det er tydeligt at forsøgslederne ikke helt har forståelsen af, hvordan vi løber, samt at den måde de instruerer løberne i at lande på forfoden, ikke gør nogen forskel ift en forbedret løbeteknik.

Subjects were then instructed on how to run using two different foot strike patterns, FFS and RFS. The FFS pattern was taught with the verbal cueing consisting of 1) “try to run on your toes” and 2) “do not let your heels touch the ground.” The RFS pattern was taught with the verbal cueing consisting of 1) “try to run with your heels hitting the ground” and 2) “try to run with your heel hitting the ground first.” Each subject was allowed to practice the different foot strike patterns on the treadmill until they felt they could use these patterns correctly

De eneste der sker er, at løberne ændrer på den måde de vinkler foden i landingsøjeblikket, men det ændrer ikke på, hvor de lander i forhold til kroppen.

The results of this study suggested that a change in foot strike pattern from RFS to FFS decreased the overall ROM in the lumbar spine during running but did not make a difference in the amount of flexion or extension in which the lumbar spine was positioned. Results also identified that RFS was perceived to be a more comfortable running pattern than FFS for recreational or experienced runners.

Interessant er det også, at i dette studie der foretrækker løberne at lande på hælen!!!

Den samme obersvation har jeg også gjort mig, når jeg taler med selvlærte forfodsløbere. De oplever sjældent, at deres løb bliver lettere og mindre belastende. Nærmest tværtimod!

Men sagen er en helt anden, når løbere lærer at lande inden under kroppen – og som et resultat af dette på forfoden – så bliver deres løb let, hurtigt og uden belastning.