When spring is in the air, every dog knows it. Spring is the season when dogs want to run, play, and stretch their bodies, when their eyes brighten, and their natural zest for life flows through their veins. Spring is a time of action. There are so many canine performance sports today that require peak levels of running, twisting, turning, jumping, and pivoting. Anyone watching a canine agility trial or flyball competition can see the adrenaline pumping through every ounce of the dog's being. Adrenaline can override the senses and the animal can unknowingly hurt himself badly, especially early in the season. The risk of injury is very high when a dog is not properly conditioned. Also, dogs need to be given the opportunity to warm up before engaging in the burst of excitement and energy they experience at the moment they are released for coursing, a herding test, or on a sledding trail.