You should, now and again, push a gear that is taller than you can
handle -- if you never push your limits, your limits will shrink.
But never do it hard enough or long enough to leave you sore. Tall
gears put a *lot* of stress on your knees, and you could do permanent
damage.
--
Joy Beeson
joy beeson at comcast dot net
http://wlweather.net/PAGEJOY/