> You can ... get trainers and coaches...but in the end the ONLY thing that works

> it's really great to do a group class where the instructor tells you what to do

So, trainers and coaches are useless, but "instructors" are alright? I fail to see the difference there.

Interacting with other people can motivate you. Having a trainer or a coach does work. Having someone tell you what to do takes off the mental part off your shoulders and then you can "just do it". And you might also feel bad if you don't show up.