mimi+me i can't give you anything scientific but for me they definitely help but my riding is at a very basic level so maybe only good for that. My problem is in canter, tend to grip with my knee when trying to nag them on (also a problem!!) and then have problems keeping my foot where i want it on the stirrup iron. With my chaps my leg is glued to the saddle so can't pull knee up even if i try! Infact the only downside to my chaps i think is when dismounting! I tried to swing my leg back, lent forward and ended up with my face buried in pony's mane and my 'swung' leg 2 inches further back than original position, RI was obviously oblivious to the chaps and just looked at me as if 'WTF??' looked like i'd thrown myself into a passionate embrace with the ponio!! I LOVE them, have just ordered more!!