The relationship between peak height velocity and physical performance in youth soccer players

Longitudinal changes in height, weight and physical performance were studied in 33 Flemish male youth soccer players from the Ghent Youth Soccer Project. The players' ages at the start of the study ranged from 10.4 to 13.7 years, with a mean age of 12.2 +/- 0.7 years. Longitudinal changes were studied over a 5 year period. Peak height velocity and peak weight velocity were determined using non-smoothed polynomials. The estimations of peak height velocity, peak weight velocity and age at peak height velocity were 9.7 +/- 1.5 cm x year-1, 8.4 +/- 3.0 kg x year-1 and 13.8 +/- 0.8 years, respectively. Peak weight velocity occurred, on average, at the same age as peak height velocity. Balance, speed of limb movement, trunk strength, upper-body muscular endurance, explosive strength, running speed and agility, cardiorespiratory endurance and anaerobic capacity showed peak development at peak height velocity. A plateau in the velocity curves was observed after peak height velocity for upper-body muscular endurance, explosive strength and running speed. Flexibility exhibited peak development during the tear after peak height velocity. Trainers and coaches should be aware of the individual characteristics of the adolescent growth spurt and the training load should also be individualized at this time.     

Coexistence of proangiogenic potential and increased MMP-9, TIMP-1, and TIMP-2 levels in the plasma of patients with critical limb ischemia

Journal of Zhejiang University-SCIENCE B - 本研究通过比较间歇性跛行 (IC)...     

Tackling knowledge ‘like a business’? Rethinking the modernisation of higher education in Poland

The year 1989 marked the official end of communist rule in Poland and the replacement of ‘Gosplan’ by new instruments for liberal-democratic governance. In terms of the economy this heralded a departure from Gosplan’s five-year planning cycles, performance targets and the ‘propaganda of success’. Paradoxically, however, 27 years later, the marketisation of higher education in Poland has been accompanied by a continuation of Gosplan thinking. This is manifested in a neoliberal vision of the modern, ‘corporate’ university as a largely utilitarian enterprise, but subject to a style of performance management strongly resonant of the Soviet era. This article analyses the thinking, ideas and ideologies that have shaped contemporary higher education in Poland. It is contended that the rise of the ‘corporate university’ signals the twilight of the Humboldtian tradition and raises questions about what the corporate ideal of ‘excellence’ may mean for the future of the university.