There are no excuses.
If you have working legs- use them.
Many would love to have them.
If you have working arms- strengthen them.
Some don't have the ability to simply feed themselves.
If you have both-
seriously - get off your behind... and just do it.
Dig deep for the desire, the energy, the want, the need and most importantly - the self-worth. YOU are worth it. Don't sell yourself short. Ever.