How does gender affect VO2 max?

How does gender affect VO2 max?

• A. Men generally have approximately 20 percent higher VO2 max than women.
• B. Women generally have approximately 20 percent higher VO2 max than men.
• C. There is no gender difference in VO2 max.
• D. Men have 50 percent higher VO2 max.

Answer: (A)

VO2 max reflects how much oxygen the body can take up, transport, and use at maximal effort. Differences between men and women come from physiology that affects oxygen delivery: men typically have larger heart size and stroke volume, higher haemoglobin levels (more oxygen carried in the blood), and more muscle mass. These factors combine to give a higher maximal cardiac output and greater oxygen delivery in men, so their absolute VO2 max is about 20% higher on average. When VO2 max is adjusted for body weight, the gap is smaller and varies with training and body composition, but the common guideline is that men are around 20% higher in absolute terms. The other options don’t fit typical physiology: there isn’t a general situation where women surpass men, nor is the difference as large as 50%.

VO2 max reflects how much oxygen the body can take up, transport, and use at maximal effort. Differences between men and women come from physiology that affects oxygen delivery: men typically have larger heart size and stroke volume, higher haemoglobin levels (more oxygen carried in the blood), and more muscle mass. These factors combine to give a higher maximal cardiac output and greater oxygen delivery in men, so their absolute VO2 max is about 20% higher on average. When VO2 max is adjusted for body weight, the gap is smaller and varies with training and body composition, but the common guideline is that men are around 20% higher in absolute terms. The other options don’t fit typical physiology: there isn’t a general situation where women surpass men, nor is the difference as large as 50%.