Are SPDs less efficient than "road" pedals?

Are road pedals more efficient? I think many people believe that there must be something inherently more efficient about road style pedals like the Look Keo, Shimano Ultegra SPD-SL, Time, or Speedplay pedals.

But is there any research to support this?

Problem-Solving Programs:

Solve Saddle Pain
https://bikefitadviser.com/solve-your-saddle-problems/

NEW BIKE? Get the right size:
https://bikefitadviser.com/what-size-road-bike/

SOLVE KNEE PAIN on the Bike:
https://bikefitadviser.com/solve-cycling-knee-pain/

My favorite cycling insoles https://amzn.to/2G3Sv9n

Here's a Playlist on...

More information at: bikefitadviser.com

Sign up for free as a member and get exclusive content at https://bikefitadviser.com/index.php?/register/Jprvz5

**** The usual social links: ****
**** facebook.com/bikefitadviser
**** twitter.com/bikefitadviser
**** instagram.com/johnweirath

Видео Are SPDs less efficient than "road" pedals? канала Bike Fit Adviser