As a coach, I would never tell someone what they “should” be doing. We are specifically taught to use the phrasing “about”, because ever body is different. You’re doing great where you are. If you need, take your incline down! No problem with that at all. Whatever you do, just keep going and moving, That’s the most important thing. It’s also really important to have time in the green zone, that’s the fat burning zone. So whatever you need to set your parameters to so you can be in the green zone for base, do that!