I've looked back through this thread and I can't see if anyone has mentioned that most clipless pedals can be adjusted for spring tension.





These images are meant to be typical, not an endorsement of Shimano.

If you're new to this type of pedal, or lack confidence, make sure the adjustment screws - 2 on double-sided pedals - 1 on single-sided - are wound anti-clockwise as far as they will reasonably go. There are one or two other pedalling systems which use different methods.

After a few rides, wind the tension up a couple of clicks, and repeat until the pedals are as tight as you can confidently ride.