VERIFIED BENCHMARK

CO2 Tolerance Test

Cardiorespiratory Capacity, Longer times are better
Schedule Set goal Record score
  • This is a test of respiratory function
  • Take 4 full breaths: A 3-5 second inhale, followed by a 5-10 second relaxed exhale, a 1 second pause, then begin to inhale again.
  • At the top of the 4th inhale when your lungs are totally full, start a timer and exhale as slowly as possible. Stretch out the exhale for as long as possible. It’s helpful to close your eyes so that you can more effectively stay relaxed.
  • Stop the timer when your air runs out, or you feel the need to inhale
  • Record the total elapsed time in seconds the box below