The VO2 response to exhaustive square wave exercise: influence of exercise intensity and mode

S B Draper, D M Wood, J L Fallowfield
European Journal of Applied Physiology 2003, 90 (1-2): 92-9
We investigated the oxygen uptake ( VO(2)) response to exhaustive square wave exercise of approximately 2, 5 and 8 min duration in cycling and running. Nine males completed a ramp test and three square wave tests on a motorised treadmill and the same four tests on a cycle ergometer, throughout which gas exchange was assessed (Douglas bag method). The peak VO(2) from the ramp test was higher for running than for cycling [mean (SD): 58.4 (2.8) vs. 55.9 (3.7); P=0.04]. However VO(2max) (defined as the highest VO(2) achieved in any of the four tests) did not differ between running and cycling [60.0 (2.9) vs. 58.5 (3.3); P=0.15]. The peak VO(2) was similar ( P>0.1) for the 5 and 8 min square wave tests [98.5 (1.8) and 99.2 (2.3) % VO(2max) for running; 97.0 (4.2) and 97.5 (2.0) % VO(2max) for cycling] but lower ( P<0.001) for the 2-min test [91.8 (2.5) and 89.9 (5.5) % VO(2max) for running and cycling respectively]. VO(2) increased over the final two 30-s collection periods of the 2-min test for cycling [Delta VO(2)=0.18 (0.15) l.min(-1); P<0.01] but not running [Delta VO(2)=0.00 (0.09) l.min(-1); P=0.98]. We conclude that in the aerobically fit the peak VO(2) for square wave running or cycling at an intensity severe enough to result in exhaustion in approximately 2 min is below VO(2max). In running, VO(2) plateaus at this sub-maximal rate.

Full Text Links

Find Full Text Links for this Article


You are not logged in. Sign Up or Log In to join the discussion.

Trending Papers

Remove bar
Read by QxMD icon Read

Save your favorite articles in one place with a free QxMD account.


Search Tips

Use Boolean operators: AND/OR

diabetic AND foot
diabetes OR diabetic

Exclude a word using the 'minus' sign

Virchow -triad

Use Parentheses

water AND (cup OR glass)

Add an asterisk (*) at end of a word to include word stems

Neuro* will search for Neurology, Neuroscientist, Neurological, and so on

Use quotes to search for an exact phrase

"primary prevention of cancer"
(heart or cardiac or cardio*) AND arrest -"American Heart Association"