Shortening and lengthening at the gallop using a related distance. This is another good exercise and the next progression: Set up two cavalletti or easy jumps exactly 16.5 metre apart. For those of you who are not into jumping, a couple of fencing rails on the ground will do (in that case make it 15 m). This is a distance of four easy strides at a good show-jumping canter (350 m/min).