My trainer told me not to sweat bucking on a lunge or free lunge. The horse can move at his speed as long as he moves and doesn't stop until I say whoa.
Sam will lope and buck the first few circles if I haven't worked him in a while and he is hot. One reason I do lunge him is to get his wiggles out before mounting.
Are you sure this is an issue to be concerned with? Is it bucking or playful galloping?
A one hand stop is what I was taught to bring Sam into control if I ever feel out of control and a whoa was ignored. Bring either rein to the same knee bringing the horses head to your knee. It disengages the rump and they can't buck. I practice this often. It bends the horse but also teaches him to stop. The first few times he circled in place a few rounds.
Really examine the bucking during lunge. It may be more frolick than you think. I enjoy watching Sam give a little buck to his gallop. He is moving carefree and since I am not on him that's ok.
Just like your horse, Sam will give a buck if I redirect him during the lunge. I guess since my trainer told me not to sweat it, I have no worries with him bucking while riding (from that at least).
Last edited by AQHSam; 02-07-2012 at 10:52 PM.