Exercise Physiology Case Study

Exercise Physiology It has long been thought that strenuous or prolonged exercise can affect the human’s endocrine system. This is an interesting scenario because endocrine system synthase performs as a negative feedback system. This means that when there is an unusually high level of a hormone in the blood, a signal will be sent back and production of that particular hormone will be stopped. The negative feedback system can easily keep all hormones levels at the optimal level for humans. When people train or exercise for a prolonged period of time they must understand the stress they can potentially bring upon their body. The changes in some hormonal levels can be beneficial or harmful to an individual’s performance and health. In order …show more content…
The biggest difference in this study was patients performed exercise until exhaustion. This led to a similar finding in the decrease in testosterone, and with the prolonged exercise testosterone levels dropped below that of a normal control day in which no exercise was performed. I found the overall approach of this study very beneficial. Test subjects were recruited for this long distance endurance running were placed into two categories of previous training and no training. The approach was to overstrain some in each group and leave some non-overstrained. It is understood that trained individuals versus untrained individuals can better resist the changes seen in catabolic hormones in response to prolonged exercise. There are two catabolic hormones that I will analyze and they are cortisol and epinephrine. Cortisol levels are quite interesting over the course of exercise. In a study conducted by Institute of Exercise Biology found that there was an initial increase in cortisol levels during the first twenty to thirty minutes of exercise. After this increase there was a decrease observed, and this decrease can fall below pre-exercise levels of cortisol. Then a second increase of cortisol in the blood can be observed during the second hour of exercise …show more content…
The body stops the secretion of these anabolic hormones because it needs to secrete hormones like epi and glucagon which can increase the amount of blood glucose in circulation by stimulating the liver. The higher intensity levels of exercise as explained before need to focus on glycogenolysis to meet fuel needs. There basically is no need for anabolic hormones to build up lipids, fats, for a fuel source when they will not be utilized in high intensity or long endurance exercise. This can especially be seen towards the final minutes of exercise. During these last minutes of high intensity there was actually an increase in free fatty acids, FFA, concentration in the blood. This indicates that lipolysis is not being utilized as an alternate source of fuel. It cannot be determined if these changes are a direct reciprocal of each other, but we can hypothesize that there is a general positive correlation between the decrease use fats and increase use of aerobic