Exercise physiology

Exercise is dependent on skeletal muscle contraction and relaxation via energy released from the breaking of the high­energy phosphoanhydride bonds of ATP. ATP is generated from ADP+P​i​using energy derived from the metabolism of macromolecules such as proteins, carbohydrates, and fats. Mild or moderate exercise uses primarily fats as the energy source for K​ ATP generation. Mild exercise is not limited by depletion of energy substrate. ​Oxidative phosphorylation provides most of the ATP requirement

me. My first attention was to become a physical therapist when I started at South but I ended up changing my major to Exercise Science. I met with my advisor at the time before fall classes started and decided to change my major. It needed to be changed because I was told I would have to do at least two more years. After finding that out I felt it was pointless to continue exercise science and do something in a major that I would still enjoy. I met with my advisor and felt more confident about my

They found that a high ambient temperature caused significant decreases in cardiac output. This failure to adequately increase cardiac output constitutes an important contributory factor limiting sedentary, unacclimated men's capacity to exercise in the heat. Gonzalez-Alonso and colleagues (Gonzalez-Alonso &Calbet, 2003) extended this knowledge and looked at the primary factors that limit V02max in trained men in thermoneutral and hot conditions. They found a decrease in V02max and time to fatigue

Fatigue diminishes your mental alertness and riding skills, and as many athletes know, fatigue also degrades muscular coordination. Motorists driving in cars need only concern themselves with staying awake and alert. On the other hand, the act of motorcycling itself is physically exhausting. After several hours on a bike, numb hands, tired forearms, neck fatigue, constant wind exposure, and the pressure of the helmet on your head combine together to wear you down. In such a state, the biker is a

Increase in exercise means there is an increase in muscle contractions. In order for your muscles to contract energy is needed. The energy needed comes from the aerobic respiration which involve glucose + oxygen to react together and make carbon dioxide + water. Increase in heart rate pumps more blood with glucose and oxygen. The breathing will increase to get rid of the carbon dioxide and to provide more oxygen, and the pulse will increase to provide the energy and oxygen needed. Our pulse rate

The effects of cardio recovery time using the step test on men vs women Lindsey Littlejohn BIOL 140 Lab   Using the step-test experiment, in order to assess the effects of how gender can effect cardio recovery time. We divided our class into two groups with two individuals in each group. It did not depend on what gender calculated your recovery time for you. We measured our partners pulse rate before even beginning the step-test and after they exercised using step-test. After the step test

metabolic rate (sleeping metabolic rate) and our arousal (wakefulness). At the onset of exercise, VO2 cannot initially support or new metabolic demands at sub-maximal level, so an oxygen deficit is created and must be compensated by our anaerobic metabolic systems. As exercise continues, for about 3-5 minutes, our aerobic system syncs in and supplements VO2, and a steady state is achieved. Heart rate increases as exercise increases in order to support an increase in VO2 and the metabolic demands required

while having a normal body temperature, being refrain from eating for up to 12 to 14 hours prior to measurement, or even going without from a vigorous exercise for at least 48 hours prior to measurement.

Cardio-respiratory endurance is the ability of the lungs and heart to use and transport oxygen over an extended period of physical activity. To effectively measure the cardio-respiratory endurance of the individuals in our class, a multi-stage fitness test (commonly know as the beep test) was performed. Cones are placed 20m away from each other on a flat, non-slip surface as participants are required to run from one end at the sound of a recorded ‘beep’ noise and must reach the other side before

Due to the activation of the SNS via dynamic exercise, the body’s CV system underwent regulatory changes to ensure the active skeletal muscles were supplied with sufficient oxygen, via the redistribution of blood, due to the increased metabolite production and need for waste removal. The need for more oxygen supply resulted in increases in HR during dynamic exercise. Sympathetic activation causes adrenaline to be released into the bloodstream (polson). The raised hormonal activity of adrenaline causes