Can I use heart rate monitor during sex to improve performance? (1 Viewer)

[kuromusha]

I just received my Polar RC3 heart rate monitor watch thing, the only reason I bought it was because it was sold at a significant discount at ozbargain.

I'm have no plan to run or do any exercise, but can I use the device during sex to improve my cardio?

 

[obliviousninja]

How is that gonna improve ur cardio