To enjoy the glow of good health, you must exercise.
Exercise should be regarded as tribute to the heart.
If all human lives depended upon their usefulness - as might be judged by certain standards - there would be a sudden and terrific mortality in the world.
Fat is one of the chief enemies of the heart because it has to be plentifully supplied with blood and thus needlessly increases the pumping load that the heart must sustain.
A concave chest means that your diaphragm is sagging.