01/07/2021
Musher BioChemistry 101. ❤️
By Jen Mignard
So this a very simplified explanation of how dogs obtain their energy for running. There are a lot of other variables involved, so please understand this is just a very rudimentary explanation. It’s also the reason that unless your dog has an injury, they should never be sore after an appropriate training run factored on previous conditioning, speed, distance, weight, etc.
Within all of our muscle cells, human and dog, there are tiny powerhouses called mitochondria. They produce chemical energy from the food we eat. Humans have a few, dogs have many. The process by which the mitochondria create that energy is called oxidative phosphorylation. The byproduct of oxidative phosphorylation is molecular water. That molecular water is then used in other cellular processes.
When humans, who have very few mitochondria, run out of that chemical energy from our food, we turn to a process called anaerobic glycolysis. That energy is produced from stored glycogen, and the byproduct is lactic acid. Lactic acid build up in our muscles is what causes us to feel stiff and sore after exercise, and it takes a while for our liver to break it back down.
Because of the large amount of mitochondria in canine muscle cells, dogs that are properly conditioned for the speed and distance they are running do not have to use the anaerobic glycolysis process for energy. Which means no lactic acid build up and no muscle soreness.
Dogs do not need to be sore in order to make strength and speed gains. In humans we often use muscle soreness as a gauge of how much we exerted ourselves or how good a workout session may have been. In dogs, this is very bad.
So there is the extremely rudimentary musher biochem lesson. 🧫🌡
When a dog is repeatedly made sore by inappropriate training methods, the musher/driver is playing with fire. First, it’s a sign the dog is being pushed too hard and thusly, they are going to be more prone to injury. Second, Dogs can’t reason. They can’t reason that being a little sore after a run is ok and it will go away. At some point, they may begin to associate running with being sore. They may begin to not “trust” you. Some very nice dogs have been mentally ruined and no longer want to pull because of this. And sometimes it’s something as simple as getting lost or taking the wrong trail and going too far.
My mentor has finished several Iditarods. 1000 miles in 9-13 days, depending on the musher. That’s such a high bar in dog health, care, and training, and we have a few Iditarod mushers in this group. My mentor has told me a good musher doesn’t sore up their dogs. A good musher doesn’t need to know how to massage their dogs after a run. So if they can train dogs for a 1000 mile race without making them sore, recreational mushers can absolutely do the same. Some food for thought. ❤️