Saddle fore/aft position is important. I've always found the old idea of dropping a plumb bob from the front of the knee to the pedal spindle, with the crankarm at 3 o'clock is too far forward. On a road bike with drop bars, you'll get too much weight on your hands, if the saddle is too far forward. I use a large 10cm saddle to bar drop but have no problems, with the saddle set back far enough. I got back on my bike after almost 8 years off, at age 65 and had no problems with the same position I'd been using at age 57.