What are some proven recommendations for strengthening hamstrings for a cyclist who seeks to improve climbing?
I am considering hiring a "physio" or trainer to correct a significant muscular imballance I developed years ago during some substancial weight training. That is, while doing leg work, my hamstrings would not fire and all my squats and leg curls where developing my calves instead of my hamstrings. Today, while cycling, my calves are fatiquing from doing so much of the work while my hamstrings are not being engaged.
Training my body to get my hamstrings to fire would be the best way to describe what I'm looking for.

All useful and productive comments are welcomed.