ثمَّ الرياضة أمنع سَبَب لِاجْتِمَاع مبادىء الامتلاء إِذا أصبت فِي سَائِر التَّدْبِير مَعهَا مَعَ إنعاشها الْحَرَارَة الغريزية وتعويدها الْبدن الخفة وَذَلِكَ لِأَنَّهَا تثير حرارة لَطِيفَة فتحلّل مَا اجْتمع من فضل كل يَوْم وَتَكون الْحَرَكَة مُعينَة فِي إزلاقها وتوجيهها إِلَى مخارجها
Now exercise is that agent which most surely prevents the accumulation of these matters, and prevents plethora. The other forms of regimen assist it. It is this exercise which renews and revives the innate heat, and imparts the necessary lightness (airiness !) to the body. For it causes the subtile heat to be increased and daily disperses whatever effete substances have accumulated; the movements of the body help to expel them, conveying them to those parts of the body whence they can readily leave it