Vurgun, HEdis, Ç2024-07-182024-07-182322-3537http://akademikarsiv.cbu.edu.tr:4000/handle/123456789/5991It was to examine the development of handball athletes' functional movement screen (FMS) and muscle endurance of the core strength training applied on the unstable ground,which is included in the warm-up sessions for 6 weeks (Week/3 Days) during the season. Method: 16 young handball players who played 5 training sessions and 1 official competition a week participated in the study (age: 18.31 +/- 0.47,height: 177 +/- 0.96 cm,weight: 64.3 +/- 10.42 kg,BMI: 20.28 +/- 2.79 kg/m(2)). Before and after 6 weeks of training,the athletes were tested with FMS tests (deep squat,in-line lunge,hurdle step,rotate stability and trunk stability),and the endurance values of the core area at 4 different angles. Results: According to statistical analysis results,while FMS total scores (p = ,001, Es = 0.61), deep squat (p = .003, Es = 0.50) hurdle step p = .008,Es = 0.38,p = ,0.20,Es = 0.33), significant improvements after 6 weeks core training (p>0.05),no statistical significance was found in core endurance with other FMS measurements. Result: Unstable floor static core training,which will be applied only after the warm-up session during the season,can help the athletes to correct and protect their basic movement practices. Core exercises,which will be applied only in the warm-up session,can protect the athletes from injury risks and save the trainers' core training sessions without spending an extra training session,allowing athletes to do different technical-tactical training.EnglishSTABILITYACTIVATIONSTRENGTHPERFORMANCEPREVENTIONPROGRAMBALANCESQUATTRUNKBODYArticle