Factors affecting repeated sprint ability (RSA) were evaluated in a mixed-longitudinal sample of 48 elite basketball players 14 to 19 years of age (16.1±1.7 years). Players were observed on six occasions during the 2008-2009 and 2009-2010 seasons. Three basketball-specific field tests were administered …

Pitch size varies in official soccer matches and differently sized pitches are adopted for tactical purposes in small-sided training games. Since interactive team behaviour emerges under constraints, the authors evaluate the effect of pitch size (task) manipulations on interactive team behaviour in small-sided …

This paper presents an analysis of two comparable studies with LEGO Robotics-based activities in a social skills training program for children with autism spectrum disorders (ASD). One study has been carried out with a group of 16 children in the Unit of Pediatrics Psychology and Psychiatry in HSJD in …

Senioren zijn vaak minder snel en sterk dan ze altijd zijn geweest. Dit komt deels door de afbraak van spiervezels en een veranderde, zittende leefstijl. Met name de witte spiervezels, gebruikt voor korte, krachtige handelingen, worden op hogere leeftijden afgebroken. Dit heeft als resultaat dat ze voor …

De bekendste verklaring voor de noodzaak van de dwangrotatie van de humerus bij maximale abductie is van Hoppenfeld, waarin hij duidt op een ossale beperking. In deze verklaring suggereert Hoppenfeld dat het glenohumerale gewricht, na exorotatie van de humerus en bij een stilstaande scapula, een gewrichtsuitslag …

In this essay Chris van der Heijden (Dat nooit meer [Never Again]) answers his critics. He accepts in general what Bob Moore says, although his criticism is rather abstract. He does agree partly with Koes Aerts, but not on some crucial points – for example the method. Van der Heijden doesn’t agree at …

The aim of the present study was to find early markers for overreaching that are applicable in sport practice. In a group of elite soccer players aged 15–18, the stress–recovery balance and reaction times before and after exercise were assessed. Overreaching was indicated by an elevated submaximal heart …

Talent development programmes for professional soccer clubs aim to guide players towards professional level performance. We identify whether the intermittent endurance capacity of these players may have changed over time. Since the 2000/2001 competition season, the intermittent endurance capacity of …

The present study examined whether performance characteristics discriminated between selected and deselected players in talent development programmes. This examination was carried out in talented soccer players, aged 16-18 years using objective measurement instruments. Four domains of multidimensional …

In soccer, critical match events like goal attempts can be preceded by periods of instability in the balance between the two teams' behaviours. Therefore, we determined periods of high variability in the distance between the teams' centroid positions longitudinally and laterally in an international-standard …