Cycling Pedals What Is The Most Effective Way To Ensure My Feet Remain On The 'cycle Pedals?

What is the most effective way to ensure my feet remain on the 'cycle pedals? - cycling pedals

I have a mild form of cerebral palsy have difficulty forcing my feet to remain flat as the bicycle-pedal cycle. What are the most effective, the earlier a strong and durable, could not be ensured by other means (eg, relaxation) without my help grip pedals?

These are clips / bands really the best way forward? I do not think I feel so secure with the strap only, either.

Thanks