possibly natural. guys like that have insane grit and determination to get those results, thats why hes a SEAL. I trained with an SF guy before, use of force instructor from Blackwater.. the dude spend some time in prison, hadn't worked out in months and squated 315 for 10 his first time back, right in front of me. ass to grass. couldnt believe it. SERIOUSLY intense and scary mother fucker. devoted to fitness and jacked all year round. those guys are a different breed of person from civilians.
sort of looks foolish with a gun on him though lol. small man syndrome maybe..