that would be the mohs hardness scale, curly.
BTW (taken form a web page, not wuthored by me)
"Technique Drills
A study was done on riders in the Tour de France several years ago, and its conclusions were surprising. While the riders actually lost power and muscle mass during the three weeks, they were faster at the end of the race as they became more efficient on the bike.
A couple of good and popular drills are listed below.
Spin-ups. Most people have a cadence sweet spot and when they try to spin a little more quickly; their mechanics often fall apart as the pedals turn faster. One simple drill to improve your pedal stroke is to find a gentle downhill and start pedalling at the top at your comfortable cadence. As the bike speeds up, try to shift as little as possible and instead keep up with the speed of the bike by spinning faster. You’ll find that you start to bounce on the saddle as you pedal faster than you are used to. Do this once a week in the early riding season with four-six repeats per workout and you should begin to see a smoother spin and you’ll be able to postpone the bounce until much higher rpms.
One-legged pedalling. Most people have dead spots in their pedal stroke where one leg is a passenger being carried by the other. One way to start to learn how to use both legs through as much of the stroke as possible is to spend some time pedalling with one leg at a time. This is easiest to do on an indoor trainer, but you can also do it on a flat smooth road. You’ll quickly feel the dead parts of your stroke and learn to apply power all the way around. Again, there is no need to do this more than once a week, but you’ll certainly see results quickly."