I'd say you have a bike fit problem. If your frame is too large it might be making the best of a bad situation, but my guess is it's most likely from clueless assembly.

With the seat knuckle in front of the post, your effective seat angle is likely too steep; for best results you should start with a position that allows the bottom of your patella to sit directly over the pedal spindle, and tweak slightly to taste.

And if you're going to do that, you might as well ensure the seat is as high as you can get it without your hips rocking, keep the ball of your foot above the pedal spindle (toe clips are good) and spin a cadence of 80-100rpm.

The difference between the horribly inefficient way most casual cyclists ride and the proper way to do it is night and day.