What is the best way to control my breathing when doing cardio?

During cardiovascular exercise, you should make a conscious effort to breathe deeply through your diaphragm (nose) with a smooth purposeful rhythm. Try to breathe as naturally as possible just as long as you are not taking in short shallow breaths. This is not suggested and can cause more harm than good.

If you come to a point in your exercise where you are losing control of your breathing patterns then you can reset your rhythm by taking deep breaths. Try this method by inhaling through your nose deeply and exhaling out your mouth for a few cycles. These should be elongated breaths. Gradually, you should start feeling a bit more control of your breathing as you start to breathe more normally.