Could I please have your thoughts. If I was a rower and didn't run, I would find this test hard on a treadmill. Would I expect, in using muscles in a way they are not used to, to experience a slower running economy and to show more lactate intervention at a lower heart rate ie lower thresholds than if I did the test on a rowing machine that I am used to performing on? The question is really, is the test sport specific and should it be done on machines or under conditions you are used to?