What are the different types of pedal arms used in bicycles and how do they affect the performance of the bike?

There are mainly two types of pedal arms used in bicycles: platform pedals and clipless pedals. Platform pedals are flat and provide a larger surface area for the foot to rest on, making them more comfortable for casual riding. Clipless pedals, on the other hand, attach to special cycling shoes, allowing for a more efficient transfer of power from the rider to the bike. The type of pedal arms used can greatly affect the performance of the bike in terms of power transfer, comfort, and efficiency.