Tnavas
Well-Known Member
You're absolutely right. However, I find it difficult to keep the rest of my hands and wrists relaxed if my thumbs are pressing down on the reins. Believe me, I have tried, and many an instructor would have been delighted not to have to remind me to 'shorten your reins' at regular intervals.
I'm able bodied, and have decent sized hands with long fingers, but this is something that I have never reliably been able to crack.
You don't need to have a heavy press on the rein, if you make a fist - you will find that your thumb wants to sit flat on top - but many people unconsciously lift their thumb up.