Sore Hamstrings? Help (Ta)

kluster
kluster Posts: 10
edited August 2008 in MTB general
Hi all, how's it going? Hope you all OK.

Went for a ride about a week ago. Before the ride I increased the length of my seatpost about an inch or two. I done this coz there was a lot of climbing and it was a long ride (about forty miles).
For a few days after the ride my legs were aching (as they would). But still now, the tendons behind my knees, and mostly up the back of my thighs (Hamstrings?) are still sore (especially when I try to put pressure down on the pedals).
Any help or advice please?

It's driving me Mad not been on the bike for two weeks.