Even emphasize the being out of breath by breathing harder than your lungs started to breathe, and then let your lungs pump and pump and pump until they find their own equilibrium.

The result is delightful, and the physical freedom that follows is more than delightful.

I remember seeing two girls climbing in the high Rocky Mountains in this way, when other women were going up on ponies.
Finally one of the guides looked back, and with an expression of mild astonishment said "Well, you have lungs!" This was a very pleasant proof of the right kind of breathing.
There are many good points for climbing and walking and swimming and all outdoor exercise that can be gained from the best sort of physical culture; and physical culture is good for girls when it gives these points and leads to a spontaneous love for outdoor exercise.

But when it results only in a self-conscious pose of the body then it is harmful.
We want to have strong bodies, free for every normal action, with quiet nerves, and muscles well coordinated.

Then our bodies are merely instruments: good, clean, healthy instruments.