TY  - JOUR
AU  - Granacher, Urs
A2  - Granacher, Urs
A2  - Goesele, A.
A2  - Roggo, K.
A2  - Wischer, T.
A2  - Fischer, S.
A2  - Zuerny, C.
A2  - Gollhofer, Albert
A2  - Kriemler, S.
DB  - BISp
DP  - BISp
KW  - Absprungkraft
KW  - Beinkraft
KW  - Beinmuskulatur
KW  - Beinstreckkraft
KW  - Belastungsintensität
KW  - Hypertrophie
KW  - Kind
KW  - Kindertraining
KW  - Kniebeuge
KW  - Kniestreckung
KW  - Kraftmessung
KW  - Krafttraining
KW  - Kraftzuwachs
KW  - M. quadriceps femoris
KW  - Muskelhypertrophie
KW  - Muskelmasse
KW  - Sportmedizin
KW  - Sprunghöhe
KW  - Sprungkraft
KW  - Sprungkrafttraining
KW  - Trainingseffektivität
KW  - Trainingsintensität
KW  - Vorpubertät
KW  - Widerstand
KW  - Widerstandskraft
LA  - eng
TI  - Effects and mechanisms of strength training in children
TT  - Wirkung und Mechanismen des Krafttrainings bei Kindern
PY  - 2011
N2  - It has been demonstrated that strength training can be organized in children in a safe and effective way. However, there is limited data regarding its impact on muscle hypertrophy. This study investigated the effects of a high-intensity strength training (HIS) on knee extensor/flexor strength, countermovement (CMJ) jumping height, postural control, soft lean mass and muscle cross-sectional area (CSA) of the dominant leg in prepubertal children. Thirty-two children participated in this study and were assigned to an intervention (INT; n=17) or a control class (n=15). The INT participated in 10 weeks of weight-machine based HIS integrated in physical education. Pre/post tests included the measurements of peak torque of the knee extensors/flexors at 60 and 180°/s, CMJ jumping height, postural sway, soft lean mass of the leg by bioelectrical impedance analysis, and CSA (m. quadriceps) by magnetic resonance imaging. HIS resulted in significant increases in knee extensor/flexor peak torque (60°/s and 180°/s). HIS did not produce significant changes in CMJ jumping height, postural sway, soft lean mass, and CSA. Although HIS was effective at increasing peak torque of the knee extensors/flexors in children, it was unable to affect muscle size. It appears that neural factors rather than muscle hypertrophy account for the observed strength gains in children.Verf.-Referat
L2  - https://dx.doi.org/10.1055/s-0031-1271677
DO  - 10.1055/s-0031-1271677
SP  - S. 357-364
SN  - 0172-4622
JO  - International journal of sports medicine
IS  - 5
VL  - 32
M3  - Gedruckte Ressource
M3  - Elektronische Ressource (online)
ID  - PU201111009302
ER  -