[Osem]

Take up a martial art like karate, there are loads of clubs around and session times to suit everyone. You don't have to be super fit, it's great for general wellbeing, mental health, self control and so many other things, plus there's a social side which would enable you to meet new people with a common interest. Over the years I've seen many an angry young testosterone fuelled man change completely as a result of the discipline and hard work involved. It's great for self confidence too.