Commuting is exercise?

I walk, ride a bicycle and take a sauna bath (?) almost every day. I think commuting is exercise. In the morning I wake up early and go to the station by bicycle. Then I get on a train which is so hot like a sauna bath in summer. I get off it, then take a bus but I haven’t lost weight. Why I can’t lose weight? I’m sure that commuting is excessive excise. I feel stress everyday, so I carelessly eat too much. I have to do another exercise. For example soccer, basketball and basketball are great. It is important to enjoy and not to feel stress.