Question

Please answer each question below based on your favorite athlete. The athlete can be amateur, sub-elite, or professional; they just need to be a real person that can be verified via the internet. Be sure to show all calculations. You are allowed to use resources (e.g., textbooks or journal articles) to support your answers, though you do need to be sure to reference or cite any of these resources correctly. You may find it useful to discuss your answers with a friend (or friends) in class. You should not, however, copy or share your final answers with each other. Any assignment submitted with some similarity to other student submissions may be considered a violation of the OSU Academic Integrity Policy. 1. (2 points) Who is your favorite athlete and in which sport do they participate? Russell westbrook b as Ketbalt (3 points) Optimization of which skeletal muscle ATP production system would be most important for maximal performance in their given sport? Why? 2. 3. (3 points) Calculate their dietary energy needs during a standard, non-competition day. Remember to account for both basal metabolic rate (you can use the calculations for resting metabolic rate (RMR) and physical activity level. You may want to refer to chapter 8 in your text. 4. (3 points) Based on their respective event, do they require more than the RDA of 0.8 g/kg protein for an average individual? Why or why not? Calculate their total dietary nitrogen needs triacylglycerol, plasma fatty acids, or plasma glucose) would provide the bulk of their cellular energy? Why? 5. (3 points) During their respective sporting event, which fuel source (i.e., muscle glycogen, muscle (3 points) Is it necessary for them to consume energy during a competition in their respective event? Why or why not? If so, how much? 6.

Answer 1

1. Rafal Nadal , he is a tennis player .

2. Slow fibers are predominantly used in endurance exercises that require little force but involve numerous repetitions. The aerobic metabolism used by slow-twitch fibers allows them to maintain contractions over long periods. Endurance training modifies these slow fibers to make them even more efficient by producing more mitochondria to enable more aerobic metabolism and more ATP production. Endurance exercise can also increase the amount of myoglobin in a cell, as increased aerobic respiration increases the need for oxygen. Myoglobin is found in the sarcoplasm and acts as an oxygen storage supply for the mitochondria.

The training can trigger the formation of more extensive capillary networks around the fiber, a process called angiogenesis, to supply oxygen and remove metabolic waste. To allow these capillary networks to supply the deep portions of the muscle, muscle mass does not greatly increase in order to maintain a smaller area for the diffusion of nutrients and gases. All of these cellular changes result in the ability to sustain low levels of muscle contractions for greater periods without fatiguing.

4.Everyone needs to eat protein, no matter how active they are, but due to the especially strenuous demands on their bodies, athletes need more protein than the average person. The U.S. Recommended Daily Allowance of protein for adults is 0.8 gram per kilogram of body weight.

Athletes should aim to eat between 1.2 and 2 grams of protein per kilogram of their body weight every day.

5. During their respective event , muscle glycogen will provide the bulk of cellular energy .