If one stops the other will run on for a time, but its wear is increased.

When a man stops exercising and ceases to carry off by means of his skin some of these impurities, he throws an additional load on his kidneys.

When a man goes without exercise and begins to accumulate fat, that fat gradually deposits itself and not alone about the waist; it invades the muscular tissue all over his body even to his heart.

As this accumulation grows there come with it a muscular slackness and a disinclination to exercise.

The man is carrying greater weight and with less muscular strength to do it.