The The kinematic interrelationships between the lower limbs, pelvis, trunk, and racquet in the performance of the high velocity tennis serve were investigated for 10 participants using a 12 camera opto-reflective Vicon MX system, operating at 250Hz. The average absolute peak racquet centre velocity was 34.0m∙s-1, which is comparable to previous studies using high performance players. Peak vert...

One of the health objectives for the nation is to have 60% of adults 18-64 years regularly active in vigorous physical activity by 1990. In this paper an effort is made to determine whether American society is making satisfactory progress toward this goal. Two independent databases are analyzed: time diaries collected from a national sample of American adults in 1981; and the Simmons Market Res...

Exercise has become a vital part of many women's lives. However, theoretic concerns have been raised about the safety of some forms of exercise during pregnancy. Because of the physiologic changes associated with pregnancy, as well as the hemodynamic response to exercise, some precautions should be observed. The physician should screen for any contraindications to exercise and encourage patient...

A table tennis player should fixate at different distances; track the objects with different speed, and in different visual environment. Their visual skills must be well developed for these capabilities. Therefore, visual acuity in reduced lumination and facility of ocular accommodation those are two criteria for visual skills have been compared in table tennis players and normal non-players. T...

INTRODUCTION Racket sports require athletes to constantly improve and progress in their physical qualities in order to maintain competitive standards. This includes achieving and maintaining an optimal body composition. However, few studies have been published addressing this topic. OBJECTIVE This study tries to provide a complete anthropometric profile, including somatotype and body composit...

Overhead athletes including those in racket sports, throwers, volleyball players, and swimmers require full, unrestricted use of their upper extremity to compete at optimal levels. Scapulothoracic and scapulohumeral (rotatorcuff) muscle function are critical for normal overhead activities of the shoulder and play an important role in normal shoulder function. Furthermore, weakness of scapulotho...

OBJECTIVES To determine the recent incidence of eye injury due to sport in Scotland, identify any trend, and establish which sports are responsible for most injury? The type of injury and final visual outcome is also evaluated. METHODS A prospective observational study of ocular injuries sustained during sport was performed over a one year period. Only patients requiring hospital admission we...

In competitive sports it is often very hard to quantify the performance. A player to score or overtake may depend on only millesimal of seconds or millimeters. In racquet sports like tennis, table tennis and squash many events will occur in a short time duration, whose recording and analysis can help reveal the differences in performance. In this paper we show that it is possible to architect a...

Introduction: This study investigated the sport-related ankle injuries attending an accident and emergency (A&E) department during a one-year period. Methods: A total of 1,715 sports injuries cases attending an A&E department from 1 January 2005 to 31 December 2005 were prospectively recorded. Details of each classified case were recorded in a computerized record system by the triage nurse. At ...

The frame of a string instrument is subject to a large tension force when the strings are installed. Intuitively, one might expect that the frame would be stiffened by the strings. Experimental data and a theoretical analysis are presented to show that this is not generally the case. An archer’s bow is much stiffer when it is strung, but a tennis racquet is softened when the strings are added. ...