. Explain whether consuming additional protein during a space mission would help to restore fat-free body mass.
FIRST: Answer the following 3 questions below (50-100 words for each question).
SECOND: Respond to the 3 post below (75-100 words).
Save your time - order a paper!
Get your paper written from scratch within the tight deadline. Our service is a reliable solution to all your troubles. Place an order on any task and we will take care of it. You won’t have to worry about the quality and deadlines
Order Paper Now
1. Explain whether consuming additional protein during a space mission would help to restore fat-free body mass.
2. What type of exercise training program would you advise an astronaut to undertake 6 months prior to a Mars mission and during the mission?
3. Upon return from mission, how does post-flight exercise prescription change, if any?
Response 1: Delania A.
Due to a decrease in total fluid volume within the several days in microgravity causes reduction in the hearts total work effort (McArdle et al., 2015). Microgravity exposure, heart size decreases from reduction in the left ventricular volume, specifically with the left ventricular end-diastolic volume (McArdle et al., 2015). Due to the body making the necessary adaptions within microgravity, without compromising “normal” cardiovascular function during a mission (McArdle et al., 2015). The changes in cardiac functions in the left and right ventricular mass and left ventricular end-diastolic volume utilized a magnetic resonance imaging to isolate whether microgravity from a physical inactivity produced changes in cardiac loading functions (McArdle et al., 2015). A physiological adaptation to reduced myocardial load and work in real or stimulated microgravity produces the cardiac atrophy (McArdle et al., 2015).
Response 2: Alice C-O
The long-term microgravity exposure, via spaceflight or -6° head-down tilt bedrest, has been shown to produce significant cardiovascular deconditioning as well as a decreases in exercise performance. There is little known about how acute microgravity exposure influences the cardiovascular system’s ability to adjust to increases in physical work (Ade, 2008). A study was done to compare cardiovascular and exercise performance during acute upright, supine and -6° head-down tilt positions. The results suggest that the exercise capacity is immediately decreased upon exposure to a microgravity environment, prior to any cardiovascular deconditioning. With this being said that’s why astronaut’s exercise performance should be evaluated with exercise tests in the -6° head-down tilt position prior to space flight in order to establish a baseline response (Ade, 2008).
Response 3: Kendra C.
The supine prelaunch position with the lower limbs raised above the thoracoabdominal coronal plane initiates a fluid shift, which continues during orbit, with blood and other fluids moving from the lower limbs to the torso and head. During space flight, the volume in the lower limbs decreases by about 10% (1–2 L of fluid from the legs’ vascular and tissue space) compared with preflight. The facial fullness and unique puffy appearance of the head coupled with reduced volume in the lower limbs associated with this fluid redistribution is referred to anecdotally as the “puffy face–bird leg” syndrome. Microgravity has the largest effect of the space-flight environment on human physiology; all organ systems are affected to some degree. The shift of fluid toward the head distends the baroreceptors of the central vasculature, which triggers suppression of the renin-angiotension-aldosterone system, release of atrial natriuretic peptide leading to increased renal excretion of salt and water, and a net reduction in plasma volume (Williams et al., 2009).
