It's been a month and a half since I started the new job, and have thus taken up cycling again as a means of not being late due to public transport. It's amazing the improvement in my fitness since then. I seem to be recovering far more quickly than before, and using generally a lower gear to cycle around than before. Steep hills like Temple Road still seem to cause my calves to explode in pain, and thus tend to get walked up, but I'd say I've knocked 5-10 mins off my time between Cowley and the centre of town. I have also lost weight, although if the trend of the last couple of days to shovel food into my mouth like some demonic trash-compactor continues, this may not last.
In general, cycling in Oxford is better for fitness than cycling in Cambridge because (a) it's a bit hillier and (b) things are further apart. I'm glad to be on the bike again and relishing the feeling of control and freedom cycling gives me.
Cycle. It's the shits.