Question to LA............... Chiefly, what is the height difference between your handlebar (top) to that of your saddle which I hope is NOT tilted down, btw? Your saddle height (and horizontal) might be well within reason (in other words just fine) at an appropriate length/relation to the pedal............. Whereas you might be realizing undo strain to the glutes and hamstring as you could have too low positioned handelbars (relative to saddle height) which demand you bend over too much thus straining those muscles be same when on the tops, hoods or all the way down. Additionally, not knowing your size/physique but are you too forward in your seating position(s), especially if you have a long femur............? Where is your saddle positioned on the seat post........., central, forward, all the way to the rear? If you are ultimately way forward on just that alone - knee in front of pedal spindle - this might also be the culprit.
Last edited by equinoxranch; 05-22-14 at 08:11 PM.