Mark Sisson is a fitness author and blogger, and a former distance runner, triathlete and Ironman competitor. His latest book “Primal Endurance” is available now via Amazon.
Video Source
42 Comments
Leave a Reply
You must be logged in to post a comment.
Words of the day…mitochondrial biogenesis 😜👍
so because david goggins had been doing all that heavy weight lifting before he ran 101 miles in one day on no training he had a shit ton of mitochondria and they were very efficient making him able to complete an insane race like that, plus the fact that he is an absolute animal who i strive every day to be like.