Or stretch your legs during lunch. It will clear your mind and make you more productive for the remainder of the day. Especially when others are encouraging you to do so. Integrity sold cannot be repurchased. Do not allow yours to go on the trading block, for there will always be a ready buyer.
Integrity means doing what is right, even if it is unpopular, unfashionable and unprofitable.
Develop a reputation for honesty and integrity. If you have failed in these areas in the past, your new job is an opportunity to start fresh. It is a reputation you must earn over time. And live up to that reputation at all times, at work and everywhere else. Don't use profanity, even when others do.