Accuracy of maturity prediction equations in individual elite male football players.

Background: Equations predicting age at peak height velocity (APHV) are often used to assess somatic maturity and to adjust training load accordingly. However, information on the intra-individual accuracy of APHV in youth athletes is not available.

Aim: The purpose of this study is to assess the accuracy of predication equations for the estimation of APHV in individual youth male football players.

Similarities and differences between sports subserving systematic talent transfer and development: The case of paddle sports.

Objectives: The aim of this study was to investigate similarities and differences for 18 sports toward canoe/kayak in order to identify donorsport and/or multisports, based upon a systematic analysis of the task constraints per sport that are assumed to be either crucial or less important from the coaches' viewpoint.

Design: Descriptive survey analysis.

Methods: 891 certified coaches from 19 sports valued (0-10; not important at all-very important) 15 characteristics by a questionnaire (Flemish Sports Compass) within their sport.