Thanks. I had actually already wondered about whether I was depressed. I don't think I am, though this was not at all obvious to me, and I had to consider the possibility for some time before rejecting it. I perhaps have a slightly flat affect compared to some, but I think I enjoy life and have a basically happy disposition.

I recently starting a bodyweight exercise regime with a friend (2 x 1 hour sessions / week), but we haven't had a session in a while because he recently took an injury boxing. I think I'll start running on my own so I'm not so tied to that one activity (and in accordance with the advice in Optimal Exercise).

I think my diet is decent.