TY - JOUR
TI - Knee flexion and extension strength in young Brazilian soccer players: The effect of age and position
AU - Herdy, C.V.
AU - Galvao, P.
AU - Costa, G.S.E.
AU - Ramos, S.
AU - Simao, R.
AU - Pedrinelli, A.
AU - Mansur, S.
AU - Goncalves, D.
AU - Paschalis, V.
JO - Human movement science
PY - 2018
VL - 19
TODO - 3
SP - 23-29
PB - Sciendo
SN - 0167-9457
TODO - 10.5114/hm.2018.76076
TODO - null
TODO - Purpose: To compare isokinetic knee flexors and extensors concentric muscle strength in young soccer players of different ages and playing positions. Methods: Seventy-seven young male soccer players were divided into 3 age categories: U-15, U-17, and U-20, with the consideration of 4 game positions: goalkeepers, defenders, midfielders, and forwards. The concentric tests of the hamstrings (Hcon) and quadriceps (Qcon) were performed at 30°/s, 60°/s, and 180°/s, and the ratio of 180°/30° was calculated. Results: The values of Qcon for the U-15 turned out significantly lower in comparison with the U-20 in 30°/s and 180°/s and in the 180°/30° ratio. The Hcon values for the U-15 were significantly lower than for the U-20 at 30°/s, 60°/s, 180°/s, as well as in the 180°/30° ratio. Strength levels were shown to be significantly different between the 3 analysed categories. The goalkeepers presented with Qcon and Hcon values significantly higher than the other playing positions, regardless of the angular velocity used. Conclusions: U-15, U-17, and U-20 athletes do not have the same level of strength. The goalkeepers demonstrated high strength values, suggesting the importance of specific training for each game position. © University School of Physical Education in Wroclaw.
ER -