Effects of Exercise and Milk Consumption on Blood Serum Cholesterol in Rats

Abstract

This study investigated the effects of exercise on blood cholesterol and correlated those effects with estimates of body fat through experiments with 45 albino weanling rats (15 litter mate trios). The rats were confined to individual cages in a temperature-controlled room and fed a stock diet until they were 11 weeks old. At this time the trios were divided. Group A was continued on a stock diet and exercised for an hour in the morning and an hour in the afternoon by forced swimming. Group B was subjected to the same exercise but a portion of the stock diet was replaced with powdered whole milk, so that 30 percent of the caloric intake was derived from the whole milk supplement. Group C was fed the stock diet but activity was restricted. After 15 weeks blood samples were taken, the animals sacrificed, and the heart and adrenals weighed. The specific gravity of the carcass was also determined. Exercise resulted in a statistically significant decrease in total and free blood serum cholesterol concentration. These animals were also leaner and had larger hearts and adrenal glands. Serum cholesterol was negatively related to carcass specific gravity. The milk supplement had no significant effect on any of these measures. Several possible explanations for the effects of exercise on blood cholesterol are discussed.     

Vom erwartbaren Erkenntnispotenzial der Auftragsforschung zu Sportvereinen

Sports club research has a long tradition in Germany and has produced a considerable variety of methodological approaches and theoretical as well as empirical knowledge. This article provides an epistemologically oriented determination and reflection of the potential of knowledge of current sports club research against the background of the tender objectives of the sports development report on waves 7 to 9 (SEB 3.0). It becomes clear that in conflict between normatively charged goals of the SEB—defined by the public client (principal)—non-judgmental, theory-guided and theory-based empirical sports club research is hardly possible. This means that it is rather difficult to carry out sports club research that is based on current research and is also able to generate new and reliable scientific knowledge. Therefore, a clearer differentiation is recommended between knowledge-guided research and normatively broken objectives aimed at policy advice. In dealing with these issues, methodological and methodological strategies are proposed to achieve the goals of SEB 3.0. At the same time, the chance of generating additional theoretical and empirical knowledge on the subject of “sports club” is increased.     

Building effective places for multicultural learning

Architects who use universal design create accessible spaces for diverse users. Jeanne Higbee and Heidi Barajas describe how that model can be adapted to the design of effective learning environments for a wide range of students.     

Selected resources for emergency and disaster preparedness and response from the United States National Library of Medicine

The Toxicology and Environmental Health Information Program (TEHIP) of the National Library of Medicine (NLM) works to organize and provide access to a wide range of environmental health and toxicology resources. In recent years, the demand for, and availability of, information on health issues related to natural and man-made emergencies and disasters has increased. Recognizing that access to information is essential in disaster preparedness, a new focus of NLM's 2006-2016 Long Range Plan calls for the establishment of a Disaster Information Management Research Center (DIMRC) that will aid in collecting, disseminating, and sharing information related to health and disasters. This paper introduces several of TEHIP's resources for emergency/disaster preparedness and response, such as the Radiation Event Medical Management Web site (REMM) and the Wireless Information System for Emergency Responders (WISER) . Several of NLM's other disaster preparedness and response resources will also be reviewed.     

Deviating glucose results in an international dual-center study. A root cause investigation

During a dual-center study on obese and normal weight children and adolescents, focusing on glucose metabolism, we observed a marked difference in glucose results (N = 16,840) between the two sites, Salzburg, Austria and Uppsala, Sweden (P < 0.001). After excluding differences in patient characteristics between the two populations as cause of this finding, we investigated other preanalytic influences. Finally, only the tubes used for blood collection at the two sites were left to evaluate. While the Vacuette FC-Mix tube (Greiner Bio-One, Kremsmünster, Austria) was used in Uppsala, in Salzburg blood collections were performed with a lithium heparin tube (LH-Monovette, Sarstedt, Germany). To prove our hypothesis, we collected two blood samples in either of these tubes from 51 children (Salzburg N = 27, Uppsala N = 24) and compared the measured glucose results. Indeed, we found the suspected bias and calculated a correction formula, which significantly diminished the differences of glucose results between the two sites (P = 0.023). Our finding is in line with those of other studies and although this issue should be widely known, we feel that it is widely neglected, especially when comparing glucose concentrations across Europe, using large databases without any information on preanalytic sample handling.     

Coaching Sales Performance: A Case Study

Century 21 International, like so many sales organizations, suffered lower productivity and higher attrition from new sales associates than they judged to be acceptable. The answer, Century 21 executives believed, was to develop a twenty-one module, multimedia training program. An external consultant urged them to study the situation prior to committing to any one solution. The results were clear. While new sales people certainly needed to have their field skills “buffed” after going through pre-licensing training and entering the office, that was not their most critical need. Far more important was an in-office support system, someone to tell them how to think through inevitable rejections, how to approach recurring challenges, how to maintain confidence even when sales do not occur, how to prospect portions of the community and how to integrate into the real estate community. The data revealed the need for a solution system comprised of training, incentives, performance support materials, the introduction of a new position, a coach, into each office, and a selection method for that coach. This article describes the front end study, the program, and some of its results in real estate offices across the United States.     

Muskuläre Regulation bei ermüdungsinduzierter Vorbelastung im Krafttraining

International sport strives for increasing the level of performance in sports. Risks of manipulating the performance are not unusual. At the same time, improvements in science, engineering and data processing offer further opportunities for planning effective, low-risk and year-round training programmes for specific sports. This paper presents new approaches based on the example of techniques for strength training. Selected experimental results highlight the limitations and provide conclusions for the scientific foundation and individualization of high performance training. The approach of “muscle pre-fatigue” is verified in a training study with high jumpers. The statements show how important scientifically controlled analysis is for individual training programmes and what high significance they have for optimizing the training process. These will be essential requirements for a legal improvement of high performance in international sport.