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saddle fore/aft vs. joints/muscles(4 posts)

saddle fore/aft vs. joints/musclesWannabe
Jul 8, 2002 8:41 AM
I have put in a lot more miles on the road this year than ever before. This last week, while on vacation, I was on my mtb for the first time this year. I found myself scooting back on my saddle so far that my sit bones were almost off the back a couple of times. Never found myself doing this before and have not changed my saddle position on my MTB this year. I do not find myself moving so far back on my road bike saddles.

I've been working with my vertical position a bit on my saddle but not too much with my fore/aft as my LBS said it was in a pretty good spot. My question is:

What effects on muscle groups/joints/tendons will result from moving one's saddle forward or backward?

Andy
IMHO, not a whole lot of effect, except as the fore-aft positionbill
Jul 8, 2002 1:40 PM
changes the effective saddle height. If you push forward, you also are reducing the effective saddle height, which would make you use your hamstrings a little more. If you push back, lengthening the effective saddle height, you would use your quads and, I think, gluts a little more.
saddle position advice...C-40
Jul 8, 2002 1:49 PM
I wonder what your LBS considers a "pretty good spot"? The typical starting point places the knee directly over the pedal spindle, as measured with a plumb bob dropped from the boney protrusion just below the kneecap. From there you have to experiment on your own to figure out if this position allows you to produce optimum power.

You should notice that moving the saddle back tends to favor a slower cadence and higher torque. A more forward position should increase cadence, but reduce the available torque.

You have to decide which produces the best results. If you find your legs burning before your lungs give out, a move forward may be in order. If you're spinning like mad, the lungs are burning, but you're not getting the best speed, move the saddle back to apply more torque. Torque x cadence = power. Both are equally important. The trick is to find the best balance point. Also remember that you can benefit from sliding back on the saddle a bit while climbing, or sliding forward for more spin on the flats.

Make changes in .5cm increments, perhaps less. Ride a given position long enough to fully evalutate it, before making additional movements.
re: saddle fore/aft vs. joints/musclesngrafs
Jul 8, 2002 8:45 PM
The problem may be that having ridden your road bike more you have become accustomed to a more stretched out riding position. You may be sliding back to achieve a similar position on the mountain bike. A longer stem might help.