A mathematical model for power output in rowing on an ergometer

A mathematical model relating power output of rower to stroke rate on an ergometer (the Concept II Indoor Rower TM, Model C) is studied. The model is used to analyse the ergometer performance of a particular rower. It is determined that he can be more efficient (i.e. decrease power output while maintaining fixed velocity) by decreasing stroke rate, but at the expense of increasing force during the drive. It is also shown that he can be more efficient by increasing the drag factor (using higher vent setting) without increasing force. Dependence of power output on rowing style (the shape of the force curve) is also examined. It is shown that variation of force during the drive has little effect on efficiency, but efficiency is reduced by asymmetry of the force curve that favours the legs.     

关于有氧健身操的调查与研究

通过对有氧健身操、有氧操的锻炼内容、强度及音乐的调查,认为目前参与有氧健身操不乏其人．但大多数人都进行得较盲目。建议规范健身组织以及健全健身指导员组织。     

英语中体育项目名称赏析

从一个新的角度出发,将英语同体育运动有机地结合为一体,以详实的资料和正确的论述将体育项目名称的来源、演变及内涵融会贯通,为最普及的一门语言(英语)与最为普及的一项活动(体育)高层次地融合做了有益的尝试。     

Entwicklung gro?er Systeme mit generischen Methoden – Eine übersicht über den Sonderforschungsbereich 501

Ohne Zusammenfassung