ST401896 at BROWNVM.BROWN.EDU
Tue Mar 24 22:47:49 EST 1992
Some viewpoints on ageing:
--ageing comes about from breathingand eating. Organisms extract energy from
oxygen and food. Along the path from converting oxygen to water, some
nasty free radicals are created (e.g. superoxide). These free
radicals wreak havoc on proteins and DNA, but the food we eat contain
antioxidants which counter these damages.
--near starvation extends your lifespan because your metabolic rate
goes down. You breathe less, eat less, live less.
--exercise is good because you lower your basal metabolic rate. Maximum
oxygen intake goes down compared to sedentary individuals. It's
bad to combine near starvation with exercise because low antioxidant
levels (due to low food consumption) are accompanied by high free radical
production (heavy breathing).
More information about the Ageing