We're reasonably familiar with pedals on conventional bikes.
- Flats are convenient for normal shoes
- Clips and Clipless provide foot retention and option of pulling up
A recumbent has additional considerations
- No way to "rest" the foot on a pedal because your foot pushes from behind nor down from on-top.
- Heel strike - just the same as toe overlap for smaller DF bikes, heel strike is where your front wheel/s touch your foot while turning.
- Getting started from stopped - pedals are a lot further from the ground so raising your foot in time for the second push stroke while maintaining low speed balance.
- Danger of "leg suck" should your foot fall off the pedal and hit the road while rolling.
What other considerations are there for choosing a pedal for a recumbent bike or trike?