I have recently switched from Nike air Pegasus to asics gel 1160 due to a knee injury and my pain has more or less subsided but I am finding it very hard to get the same speed I had with the Pegasus , I am running at least 4 minutes slower than normal . I find the asics harder to run in even thought I was given a gait analalis and told this was the most suitable shoe for me . Should I go for a slightly lighter shoe or just stick with the 1160 ???