The metric or SI (Le SystÃ¨me International d'UnitÃ©s) system of units has many derived units from the seven base units. A derived unit would be a unit that is a combination of base units. Density would be an example where density = mass/volume or kg/m3. Many derived units have special names for the properties or measurements they represent. This table lists eighteen of these specialized units along with their basic unit factors.
Cadence (cycling) In cycling, cadence (or pedalling rate) is the number of revolutions of the crank per minute; this is the rate at which a cyclist is pedalling/turning the pedals. Cadence is directly proportional to wheel speed, but is a distinct measurement and changes with gearingâwhich determines the ratio of crank rpm to wheel rpm.
1 Recumbent exercise bikes are more expensive than the upright ones because of their design and larger frame. 2  Your movement is very restricted on the recumbent exercise bike while on an upright bike you can pedal standing up, sitting down or even slouching forward (like in a race bike position). relatively new entry into the world of fitness machines is the ârecumbentâ exercise bike. The recumbent exercise bike seeks to do away with all the discomfort and disadvantages that an upright bike posed for many workout enthusiasts who were just starting off.