Originally Posted by
daveryanwyoming .
Do you have any data to back that up or is it just that you felt more powerful?
Beyond the academic studies that make it highly unlikely someone can increase their sustainable power by nearly 50% (e.g. coyle et al 1991) I've got ride data that at least in my case shows almost no change in sustainable power when I ride platform pedals instead of my clipless system.
One of my Speedplay pedals seized up a while back so I slapped some no cleat, no clip, no strap platform pedals on my road bike and did my scheduled Threshold training on the same route I use week after week. Week to week my power varied by 10 to 15 watts over the course of the season. Comparing two rides on the same course within a few weeks of each other I sustained 312 watts for 20 minutes with the platform pedals and 314 with my clipless system or a whopping 2 watts less riding the platform pedals (in running shoes) vs the same route a couple of weeks earlier with my speedplays and road shoes. That's within the measurement error of commercial power meters and negligible from a performance standpoint. Here's the ride files for comparison:
Yeah, I much prefer to ride with good road shoes and securely attached to the pedals with a good clipless system and there are many safety and comfort advantages that good pedal and shoe systems bring to cycling. But the talk of increased power, particularly something as great as nearly 50% just isn't borne out by pedaling studies or actual measured performance.
Perhaps if you slide your feet all around and pedal with your heels when you don't have your cleats for alignment then there could be some measurable differences but I'm still not buying a 50% increase in power resulting from your pedal system no matter what marketing departments might say. Riders just don't instantly go from sustaining 200 watts to sustaining 300 watts when they buy a pedal system.
-Dave