I bought a set of panners this weekend and loaded them up for my commute to work today. The weight was not evenly distributed but was not off by too much. I put the heavest one on the left side of the rack. With about 80% of my commute over my left leg started to ache, may be more like a cramp. My question is could this be due to the heaver pack on the right side? Was the pack making my right leg work harder, any suggestions or answers?

Other than thay I took the river route to work today It added about 2 miles and 15 mins to the ride but I enjoyed the change of senaery.