RWBlue01

Long story cut short..

Was riding Mt bike. Doing many miles for me.
Put in a few mile on my road bike.
Hurt in different places.

Does the aggressive position on the road bike work different parts of my body? or the same muscles but in different parts?

mr_pedro

Is it muscles that are hurting or are you sore from the position that you were in?
If it is muscles it could be that you were putting out more power as the gearing forced you to go faster up hill than you were doing with the mountain bike.

RWBlue01

Some yes, some are parts of the legs so you may be right on that also.
Speedometer/cadence is dead, so I am not sure how fast I was riding.
I shifted down to the lowest gears, but that still might be above the middle gears on the mt. bike.

Carbonfiberboy 

A different position will emphasize different muscles and also different ranges of motion for those muscles. That said, many MTB racers train on road bikes for the aerobic benefit, there being much more opportunity for long periods at a particular effort level on the road than on the trail.

RWBlue01

I should state that I was commuting and multi-use trail. I am have not been on the single track blazing a path through the woods on my mt bike. I do believe I have a fit issue with the road bike.