The Walking Chronicles + Serotonin

 The other evening I was on a walk along with my spouse. I like to walk along with someone else. I am motivated. When I walk alone I tend to cut short my walk. He is a morning person and myself an evening person, hence our schedules do not match. I have tried to walk with friends but haven't been consistent.

Yet I strive to walk almost every weekday. I have read so much about exercise giving off serotonin. Where is my quota? Why do I not get that invigorating feeling? 

Yet I shall walk... Maybe i need to examine my goal.