You don't want to be sore when you're running. So I wouldn't suggest you train for a marathon and do CrossFit at the same time; the two don't align with one another. When you're a runner, your body builds the muscle where it needs to build muscle.
You don't want to be sore when you're running. So I wouldn't suggest you train for a marathon and do CrossFit at the same time; the two don't align with one another. When you're a runner, your body builds the muscle where it needs to build muscle.