Exercise also prevents obesity and reduces the energy intake: energy
stored ration. Dietary restriction is known to retard ageing: maybe
there's a link?
Incidentally, although free radicals are commonly portrayed as villains
they actually play important roles as second messengers at very low
concentrations. H2O2 is now known to be a co-factor in the sperm acrosome
reaction even though at high concentrations it's extremely toxic. NO, CO
are also important. Damage comes when free radicals spin out of control.
Dr Jim Cummins +61-9-360 2668
School of Veterinary Studies FAX =61-9-310 4144
Murdoch University cummins at possum.murdoch.edu.au
Murdoch, Western Australia 6015
