Ragnar began his physical training with normal body warmup routine. Once the warmup was done, he grabbed the steel sword provided to him by Sally and began to perform from the list of exercises he asked her to do. He had come up with the list after a lot fo considerations to improve the core strength of the body.
After experiencing battle in every moment of his previous life, he knew just how beneficial real life experience against a powerful enemy was. Also, he needed to fight if he truly wanted to awaken all his bloodlines. The troll bloodline which granted him the ability to strengthen his body was only at Intermidiate level awakening. Once it reaches high level or become awakened completely, he would be able to recieves abilities beyond what he currently possess. But to do that he needed to perfect the ability he currently holds.