Samband mellan "core"-stabilitet, funktionell rörlighet och prestation

[King Grub]

The purpose of this study was to determine the relationship between core stability, functional movement, and performance. Twenty-eight healthy individuals (age = 24.4 +/- 3.9 yr, height = 168.8 +/- 12.5 cm, mass = 70.2 +/- 14.9 kg) performed several tests in 3 categories: core stability (flexion [FLEX], extension [EXT], right and left lateral [LATr/LATl]), functional movement screen (FMS) (deep squat [DS], trunk-stability push-up [PU], right and left hurdle step [HSr/HSl], in-line lunge [ILLr/ILLl], shoulder mobility [SMr/SMl], active straight leg raise [ASLRr/ASLRl], and rotary stability [RSr/RSl]), and performance tests (backward medicine ball throw [BOMB], T-run [TR], and single leg squat [SLS]). Statistical significance was set at p </= 0.05. There were significant correlations between SLS and FLEX (r = 0.500), LATr (r = 0.495), and LATl (r = 0.498). The TR correlated significantly with both LATr (r = 0.383) and LATl (r = 0.448). Of the FMS, BOMB was significantly correlated with HSr (r = 0.415), SMr (r = 0.388), PU (r = 0.407), and RSr (r = 0.391). The TR was significantly related with HSr (r = 0.518), ILLl (r = 0.462) and SMr (r = 0.392). The SLS only correlated significantly with SMr (r = 0.446). There were no significant correlations between core stability and FMS. Moderate to weak correlations identified suggest core stability and FMS are not strong predictors of performance. In addition, existent assessments do not satisfactorily confirm the importance of core stability on functional movement. Despite the emphasis fitness professionals have placed on functional movement and core training for increased performance, our results suggest otherwise. Although training for core and functional movement are important to include in a fitness program, especially for injury prevention, they should not be the primary emphasis of any training program.

J Strength Cond Res. 2010 Feb 19. Relationship Between Core Stability, Functional Movement, and Performance.

[killenigrillen]

Hur stor ska en testgrupp vara för att vara signifikant?
28 personer känns som en väldigt liten grupp för att dra någon som helst slutsats på?

[schmecker]

studien väger väl ganska lätt i sig själv, det behövs fler och större som ger liknande resultat. men kul att nån tar sig tid och testar huruvida core-hypen är befogad...

liknande (men av samma forskare)
J Strength Cond Res. 2008 Nov;22(6):1750-4.
The relationship between core stability and performance in division I football players.

Nesser TW, Huxel KC, Tincher JL, Okada T.

Department of Physical Education, Indiana State University, Terre Haute, Indiana, USA. tnesser@indstate.edu

The purpose of this study was to identify relationships between core stability and various strength and power variables in strength and power athletes. National Collegiate Athletic Association Division I football players (height 184.0 +/- 7.1 cm, weight 100.5 +/- 22.4 kg) completed strength and performance testing before off-season conditioning. Subjects were tested on three strength variables (one-repetition maximum [1RM] bench press, 1RM squat, and 1RM power clean), four performance variables (countermovement vertical jump [CMJ], 20- and 40-yd sprints, and a 10-yd shuttle run), and core stability (back extension, trunk flexion, and left and right bridge). Significant correlations were identified between total core strength and 20-yd sprint (r = -0.594), 40-yd sprint (r = -0.604), shuttle run (r = -0.551), CMJ (r = 0.591), power clean/body weight (BW) (r = 0.622), 1RM squat (r = -0.470), bench press/BW (r = 0.369), and combined 1RM/BW (r = 0.447); trunk flexion and 20-yd sprint (r = -0.485), 40-yd sprint (r = -0.479), shuttle run (r = -0.443), CMJ (r = 0.436), power clean/BW (r = 0.396), and 1RM squat (r = -0.416); back extension and CMJ (r = 0.536), and power clean/BW (r = 0.449); right bridge and 20-yd sprint r = -0.410) and 40-yd sprint (r = -0.435), CMJ (r = 0.403), power clean/BW (r = 0.519) and bench press/BW (r = 0.372) and combined 1RM/BW (r = 0.406); and left bridge and 20-yd sprint (r = -0.376) and 40-yd sprint (r = -0.397), shuttle run (r = -0.374), and power clean/BW (r = 0.460). The results of this study suggest that core stability is moderately related to strength and performance. Thus, increases in core strength are not going to contribute significantly to strength and power and should not be the focus of strength and conditioning.

PMID: 18978631 [PubMed - indexed for MEDLINE]

[Guddi]

Hur stor ska en testgrupp vara för att vara signifikant?
28 personer känns som en väldigt liten grupp för att dra någon som helst slutsats på?Är resultatet signifikant så är resultatet signifikant. Desto större grupper desto större chans att man ser skillnader.

28 personer är en standardssiffra när det gäller träningsstudier. Det man ska akta sig för är att dra slutsatserna till andra populationer än den population som de 28 deltagarna tillhör. Tyvärr så är det ibland en stor variation på personerna i en studie och då ökar risken för att resultatet inte ska vara överförbart på en mindre subgrupp. Dvs om man studierar en grupp med personer mellan 20-50 år så kan man inte säga att det resultatet som sker gäller för en grupp där personerna är mellan 20-24 år.

Angående resultaten så går de hand i hand med majoriteten av alla andra studier på området. Frågan är ju också hur funktionellt functional movement screen är. Det är poppis men det känns ju inte direkt som att man testar någon specifikt...