Comment Re:Relax.. Take a deep breath.. (Score 1) 347
The challenge vs skill image at http://en.wikipedia.org/wiki/Mihaly_Csikszentmihalyi sums this up I think - Anxiety happens because you're not in control (either you've not organised your thoughts/tasks as well as you need, or you haven't yet enough skill to be able to counteract it).
Exercise will help, but it won't get rid of the underlying reason for your anxiety. Find out what it is then determine how you can fix it.
The business will go on if you're not around for a day/week/month. Know this and stop holding everything on your own shoulders. Stop thinking about work out of work (turn your phone off when you're not in work (and not 'on call')) and enjoy life more.