How effective is a gym? Especially the treadmill? I used to think am so sawa since i would hit the treadmill at speeds of 12-20Kph consistently for like 20 minutes, reducing the speed to 5-10 for the last 10 minutes or so.
...until I tried the real thing - running on the road, you realize how unfit you are. So, if you can, hit the road early in the morning and come back to the house to shower then head to work. Do press-ups, a bit of weights in the house (you can improvise with jerricans, mitungi, mama etc, run up and down the stairs. Its super effective and very cheap.