In reply to mlt:
Thats terrible. The extra 100g must really affect your running badly. Here are some other ways of saving weight if there's nothing else you can cut from your shorts:-
a) Have crap before you go out in your shorts
b) Have a nice long pee
c) Cut your hair off.
d) Only use half the shoe lace on your running shoes.
e) wear a female running top rather than the full size man job.
f) Cut the soles out of your shoes and just use the uppers. No one else will notice.
g) Cut the tops off your shoes and just use the soles. You will need to use a shoelace to tie them to your feet.
And just think how much further and faster you'll go.
('100g saving', he mutters as he leaves for the pub shaking his head)