Nutritional Advice Essay Example | Topics and Well Written Essays - 500 words

Nutritional Advice - Essay Example BMI cannot be used for people with a high percentage of muscle mass. This implies that in order to stay healthy, the athlete can increase his or her weight above the normal BMI range provided that the mass that is gained come mostly from muscle gain instead of fat. Given all these, it can be easily deduced that the principle behind the athlete's nutrition program would be to prevent muscle wasting from intensive cardiovascular physical activity by providing energy sources that would spare the muscles, the body's protein from being utilized for energy; and to provide just enough energy for the body to build muscles without gaining much fat. Such is not as easy as it sounds. In order to be successful in gaining muscles, all the three energy sources must be critically controlled: Carbohydrate intake must be controlled only to the extent that all can be utilized for energy and not converted to fat; protein intake must only be limited to the needs of the body to prevent fat synthesis as well as body system complications that might arise (e.g. kidney failure); fat intake must be limited only to the needs of the body but not so much as to affect its other functions such as the synthesis of other body components (e.g. cholesterol and hormones) and the solution of the fat-soluble vitamins, A, D, E and K (Whitney, Cataldo, et. al. 92-196).

Compare and contrast the basic principles of dilution and local Essay

Compare and contrast the basic principles of dilution and local exhaust ventilation. Discuss at least five items for each and the elemtns for each system - Essay Example These contaminants may pass through an air cleaner before emission into the environment. Both of the systems require make up air so as to replace that which is exhausted, failure to which would lead to a decline in the room pressures. Both systems employ fans, which create a pressure difference allowing the flow of air along with its constituents, such as contaminants, into the exhaust system (Nims, 1999). Several differences exist between the two systems. To begin with, the local exhaust ventilation is characterized by the presence of a hood (inlet). The dilution ventilation lacks a hood. The hood is placed next to the source of emission; therefore, enabling the removal of virtually all sorts of contaminants by the local exhaust ventilation. In this respect, the local exhaust ventilation is best suited and perhaps the only choice for extremely flammable and highly toxic air borne contaminants. Only small amounts of air are exhausted by the local exhaust ventilation compared to the dilution ventilation. This means that dilution ventilation will require greater amounts of cooled or heated make up air than the local exhaust ventilation (Nims, 1999). The basic local exhaust of ventilation is comprised of the hood, ducts, cleaner, fan and exhaust stacks (Nims, 1999). The hood is placed near the source of emission of the contaminants. The ducts carry the contaminant in the local exhaust system. They should have minimal resistance for efficiency. Smooth and round ducts are ideal, and the flow rates in them should not be excessive as this will creates abrasion and noise. Air cleaners eliminate the contaminants before exhausting the air. State or federal regulations dictate the type of air cleaner to be employed. Fans are regarded to as the workhorses in the exhaust ventilation system. They provide pressure differences to suction the contaminants throughout the system and into the outdoor environment. The