Maximal-intensity isometric and dynamic exercise performance after eccentric muscle actions

A well-documented observation after eccentric exercise is a reduction in maximal voluntary force. However, little is known about the ability to maintain maximal isometric force or generate and maintain dynamic peak power. These aspects of muscle function were studied in seven participants (5 males, 2 females). Knee extensor isometric strength and rate of fatigue were assessed by a sustained 60 s maximal voluntary contraction at 80 degrees and 40 degrees knee flexion, corresponding to an optimal and a shortened muscle length, respectively. Dynamic peak power and rate of fatigue were assessed during a 30 s Wingate cycle test. Plasma creatine kinase was measured from a fingertip blood sample. These variables were measured before, 1 h after and 1, 2, 3 and 7 days after 100 repetitions of the eccentric phase of the barbell squat exercise (10 sets x 10 reps at 80% concentric one-repetition maximum). Eccentric exercise resulted in elevations in creatine kinase activity above baseline (274+/-109 U x l(-1); mean +/- s(x)) after 1 h (506+/-116 U x l(-1), P < 0.05) and 1 day (808+/-117 U x l(-1), P < 0.05). Isometric strength was reduced (P < 0.05) for 7 days (35% at 1 h, 5% at day 7) and the rate of fatigue was lower (P < 0.05) for 3 days at 80 degrees and for 1 day at 40 degrees. Wingate peak power was reduced to a lesser extent (P < 0.05) than isometric strength at 1 h (13%) and, although the time course of recovery was equal, the two variables differed in their pattern of recovery. Eccentrically exercised muscle was characterized by an inability to generate high force and power, but an improved ability to maintain force and power. Such functional outcomes are consistent with the proposition that type II fibres are selectively recruited or damaged during eccentric exercise.     

The education of children with special educational needs in England

In the last few years, the Warnock Report and the 1981 Education Act have had a major effect on the education of children with special educational needs in English schools. This paper discusses the main points of the Report and the subsequent legislation and then takes examples of three local educational authorities — Leicestershire, Coventry, and Barnsley — to illustrate the range of responses that have been made. Although there is obvious overlap, the three approaches are rather different in emphasis and illustrate the ways in which an educational system based on local autonomy can respond to proposals and legislation made at national level.

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Zusammenfassung Der Warnock Report und das Schulgesetz von 1981 haben an englischen Schulen erheblichen Einfluß auf die Erziehung von Kindern ausgeübt, die einer Sonderschulerziehung bedürfen. Der vorliegende Artikel behandelt die in dem Warnock Report hervorgehobenen Schwerpunkte und die daraus hervorgegangene Gesetzgebung. Um die Verschiedenartigkeit der Reaktionen aufzuzeigen, werden Beispiele von drei kommunalen Erziehungsbehörden (local education authorities) aus Leicestershire, Coventry und Barnsley angeführt. Trotz offensichtlicher Überschneidungen unterscheiden sich die drei o.a. Ansätze in ihrer Akzentuierung; sie zeigen, wie ein auf lokaler Autonomie basierendes Erziehungssystem auf Vorschläge und Gesetzgebung reagieren kann, die auf nationaler Ebene Gültigkeit haben sollen.

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Résumé Au cours des dernières années, le rapport Warnock et la Loi de 1981 sur l'Education ont eu une répercussion remarquable sur l'éducation des enfants ayant des besoins éducatifs spéciaux en Angleterre. Cet article traite les principaux points du rapport et de la législation subséquente et cite en exemples trois autorités éducatives locales — Leicestershire, Coventry et Barnsley — pour illustrer les différentes réponses qui ont été données. Bien que les trois approches se chevauchent clairement, elles se focalisent sur des points plutôt différents, et illustrent les façons dont un système éducatif basé sur une autonomie locale peut répondre aux propositions et à la législation émanant du niveau national.