Ever wish you could breathe easier and sustain more intensity mid-workout? You may have overheard the term "VO2 max" at the ...

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VO₂ Max is the gold standard for cardiovascular fitness. It reflects how the heart, lungs, and cells work together, and provides a clear benchmark for improving healthspan and performance.” — Dr.

Add Yahoo as a preferred source to see more of our stories on Google. VO2 max testing requires a mask to measure oxygen intake and carbon dioxide output to determine your cardiovascular fitness.

VO2 max is a trendy stat for measuring your fitness, and it can help improve longevity too. Having a higher VO2 max is good, but more important for health is how the number changes over time.

Learn more about this metric and the best training sessions to add to your schedule to boost your cardio fitness.