Set-up: Make sure your saddle is at an appropriate height, the brakes work and the bike is otherwise properly maintained.
Movement: While the basic movement of cycling is rather straightforwards, a few tips are useful to keep in mind. 1) Keep your feet flat, neither excessively dorsiflexed or plantarflexed. 2) The strongest portion of the cycling movement is always the push phase, but it is critically important to generate power on the lifting and pull phase as well. 3) Keep your elbows, shoulders, and hands slightly relaxed. 4) Do not allow your head to droop, but also do not hyperextend the neck up and back.
Instructions and effects for the Bicycling exercise 
Movement in Sagittal Plane