I read on this page the phrase, 'Treading water – great all round body conditioner'. What does this mean, to condition the body? I've heard of 'conditioning' before (when reading fitness how-to's), ...
I'm not afraid of water or cold, but very sensitive to cold water, especially on my belly, waist and back. When other people claim the water's warm, I have difficulties to breathe. Can I do anything?