It's definitely the same with me. I always work out very rigorously. For example, one thing I do often is stairs - I run up and down a 3 story staircase, holding a wall sit for 1 minute 30 seconds every time I get to the bottom, and doing 20 pushups every time I get to the top - and I do this for an hour.
Afterwards, I feel really great - just awesome. And during it, I'm 'in the zone' so to speak, definitely enjoying it though, even though it's a lot of hard work. It's a great way to decompress my mind, or to help combat burnouts and such.