<b>Korfball-Based Training and Motor Skill Development in Young Athletes: A Randomized Controlled Trial</b>

Background: Korfball is a mixed-gender sport that may foster inclusive motor development in youth; however, experimental evidence remains limited. This randomized controlled trial (RCT) investigated the effects of an 8-week korfball-based training program on explosive lower limb performance in children aged 10–12 years.Methods: Thirty healthy children were randomly assigned to either a korfball training group (n=15) or a control group (n=15). The intervention group performed supervised korfball-based training three times per week for eight weeks, while controls continued standard physical education. Pre- and post-tests included the Margaria-Kalamen (MK) power test (primary outcome) and the Standing Long Jump (SLJ) (secondary outcome). Outcome assessors were blinded. Statistical analysis involved 2×2 repeated-measures ANOVA with partial eta squared (η²ₚ); significance was set at p&lt;0.05.Results: All participants completed the study. Significant Group×Time interactions were found for both MK (F(1,28)=34.333, p&lt;0.001, η²ₚ=0.710) and SLJ (F(1,28)=14.819, p=0.002, η²ₚ=0.514). Time effects were significant for both MK (F(1,28)=20.880, p&lt;0.001, η²ₚ=0.599) and SLJ (F(1,28)=7.595, p=0.015, η²ₚ=0.352). The intervention group improved MK power from ~470 W to ~618 W and SLJ from 150.5±12.6 cm to 159.1±12.1 cm, whereas the control group showed no meaningful changes. No Group×Sex interaction was detected (p&gt;0.33). No adverse events were reported.Conclusions: Eight weeks of korfball-based training significantly enhanced anaerobic power and explosive lower limb performance in children. Gains were comparable between sexes, supporting the inclusive nature of korfball. The program appears suitable for school-based physical education.Trial registration: [Registration number, registry, and date]. If not prospectively registered, please state retrospectively registered.Keywords: korfball; youth athletes; explosive power; Margaria-Kalamen; standing long jump; randomized controlled trial