Training principles: evaluation of modes and methods of resistance training--a coaching perspective

Current information and evidence indicate that for most activities free weight training can produce superior results compared to training with machines, particularly when the free weight training involves complex, multi-joint exercises. A number of reasons can account for the superiority of free weights; the major factor deals with mechanical specificity. Mechanical specificity is concerned with appropriate movement patterns, force application and velocity of movement. Considering the available evidence that adherence to the concept of specificity of exercise and training can result in a greater transfer of training effect then free weights should produce a more effective training transfer. Therefore, the majority of resistance exercises making up a training programme should include of free weight exercises with emphasis on mechanical specificity (i.e. large muscle mass exercises, appropriate velocity, contraction type etc.). Generally, machines should be used as an adjunct to free weight training and, depending upon the sport, can be used to a greater or lesser extent during various phases of the training period (preparation, pre-competition, competition).     

Making IT work for municipalities: Building municipal wireless networks

The lack of widely available, affordable broadband Internet access has spurred a movement in which municipalities are rolling out wireless broadband networks. This movement has raised a number of questions including: Why are municipalities acting as the early adopters of wireless broadband technology? How does increased state regulation of municipal broadband networks affect this trend and how can cities respond? As cities use wireless broadband technology to enhance services to citizens, the growth of municipal wireless deployments has transitioned from linear to exponential. In response, many states have passed laws to regulate and restrict cities' ability to own, operate, deploy, or profit from either telecommunications or information services. Current and pending laws will be examined to understand how cities can deploy a wireless broadband network under these regulations. An analysis of municipal facilities and technology expertise illustrates the opportunity for public–private cooperation in wireless deployments. This paper will show that cooperation is beneficial in many cases. Finally, current business models will be examined for their ability to foster cooperation between the public and private sectors, bridge the digital divide, and create competition among private sector providers.     

Launching Interdisciplinary Programs as College Signature Areas: An Example

Increasingly administrators are concerned with inspiring and supporting faculty members in the creation of interdisciplinary programs in response to research and funding shifts and public need. This article presents an initative undertaken at the University of Colorado Denver, demonstrating a method for identifying and launching a set of signature interdisciplinary programs for a diverse college environment that overcomes hesitancy and hindrances at the individual, departmental, and institutional levels.     

Departments in Academic Receivership: Possible Causes and Solutions

This article explores the concept of academic receivership in U.S. colleges and universities. Academic receivership occurs when control of an academic department or program is removed from the faculty and an outside chair is put in place by the college or university administration. A literature review is supplemented by a small survey to assess how common receivership is and how it is administered. Combined, these elements allow for a discussion of the warning signs that a department is becoming dysfunctional and a procedure to guide a department through the receivership process.

Athens 2004: the pollution climate and athletic performance

Athens sits in a basin approximately 450 km² in area, surrounded by mountains and open sea. Anthropogenic emissions in conjunction with the topographical and meteorological conditions can result in high air pollution within the city. The pollutants of concern for athletes competing in Athens 2004 appear to be nitrogen dioxide (NO₂), ozone and particulate (PM₁₀) pollution. Exposure to elevated ozone concentrations has been reported to give rise to symptoms that include cough, chest pain, difficulty in breathing, headache, eye irritation and a decrease in forced expiratory volume in one second. All of these effects are likely to impact upon performance, and several studies of cyclists suggest this to be the case. In contrast, the impact of ambient concentrations of NO₂ appears to be negligible on normal activities, but at high exercise intensities the impact remains unclear. The use of currently available information and models to predict the effect of ozone and other pollutants on elite athletes is problematical, since such models are based upon significantly lower ventilation rates than those achieved by some elite athletes. In addition, it is already known that the response to ozone can vary somewhat between individuals. Since the individuals who will be competing in Athens are physiologically very different to the participants in most published studies, it is difficult to predict individual responses. There is some evidence to indicate that adaptation to the adverse health and performance effects of ozone can occur, so that performance is partially recovered on re-exposure. The adaptation is not seen in all studies and appears to be dependent on several factors, including the initial sensitivity of the individual to ozone. Antioxidant supplementation has also been shown in some studies to partially ameliorate the adverse effects of ozone by counteracting the oxidative stress mechanism associated with this pollutant. Whether this transfers to performance enhancement per se remains unclear at present. Additional research is required to gain a sound understanding of the effects of a complex mixed air pollution exposure on the pulmonary function and performance of athletes exercising at high work intensities.     

Threshold frequency of an electrically induced cramp increases following a repeated,localized fatiguing exercise

Abstract

Though clinical observations and laboratory data provide some support for the neuromuscular imbalance theory of the genesis of exercise-associated muscle cramps, no direct evidence has been published. The purpose of this study was to determine the effect of local muscle fatigue on the threshold frequency of an electrically induced muscle cramp. To determine baseline threshold frequency, a cramp was electrically induced in the flexor hallucis brevis of 16 apparently healthy participants (7 males, 9 females; age 25.1 ± 4.8 years). The testing order of control and fatigue conditions was counterbalanced. In the control condition, participants rested in a supine position for 30 min followed by another cramp induction to determine post-threshold frequency. In the fatigue condition, participants performed five bouts of great toe curls at 60% one-repetition maximum to failure with 1 min rest between bouts followed immediately by a post-threshold frequency measurement. Repeated-measures analysis of variance and simple main effects testing showed post-fatigue threshold frequency (32.9 ± 11.7 Hz) was greater (P < 0.001) than pre-fatigue threshold frequency (20.0 ± 7.7 Hz). An increase in threshold frequency seems to demonstrate a decrease in one's propensity to cramp following the fatigue exercise regimen used. These results contradict the proposed theory that suggests cramp propensity should increase following fatigue. However, differences in laboratory versus clinical fatiguing exercise and contributions from other sources, as well as the notion of a graded response to fatiguing exercise, on exercise-associated muscle cramp and electrically induced muscle cramp should be considered.     

Individual differences in the self-image of adolescents with learning disabilities: the roles of severity, time of diagnosis, and parental perceptions.

The self-images of 49 adolescents with learning disabilities (Grades 9 through 12, mean age = 15.9) and 49 normally achieving peers (Grades 9 through 12, mean age = 16.0) were compared using the Offer Self-Image Questionnaire (OSIQ). The group with LD scored significantly lower than the comparison group on 4 of the 10 OSIQ scales. Later-diagnosed adolescents with LD scored significantly higher than early-diagnosed adolescents on two of the scales. Severity of the learning disability was not found to be related to self-image scores. In a second study, parental perceptions of the self-images of 28 of the 49 students with LD were studied by administering the Offer Parent-Adolescent Questionnaire (OPAQ) and an informal questionnaire to their parents. On 6 of the 10 OPAQ scales, parents perceived their children as having a lower self-image than the adolescents themselves reported. Significant but moderate relationships were found between parents' perceptions and adolescent self-image scores. Results of the two studies are interpreted in terms of a multidimensional conception of self-image that considers factors inherent to the individual as well as interpersonal and institutional factors.