Complex sentence: He begins an intense physical training regimen which consists of doing 50 pushups and 50 pullups every morning to prepare for war and practices a menacing, tough guy swagger in the mirror to use on whoever angers him.
Split into simpler sentences: He begins an intense physical training regimen which consists of doing 50 pushups and 50 pullups every morning to prepare for war. He famously practices a menacing, tough guy swagger in the mirror to use on whoever angers him.