Are you worried about what people will think if they see you running? Do you think people will laugh at you? Are you worried that someone you know might see you?
Why? Do you judge people? Do you see people running and think not nice things? Do you laugh??? Would you? Laugh at your neighbour giving it a go?
Make your world one of support and encouragement and love. Not jealousy and resentment and frustration.
Put your shoes on. Hold your head high. And run.
And don't forget to suck your tummy in when you see Bill and Joan from number 8.