A YouTube bodybuilding star known as Joesthetics has died at the age of 30, according to posts shared on social media by his friends and girlfriend. German fitness influencer Jo Lindner, who had 8.5million followers on Instagram and almost 500 million views on his YouTube channel, suffered an aneurysm on Friday according to his girlfriend Nicha. Earlier in June, in an interview for an episode of fellow YouTuber Bradley Martyn's Raw Talk, he spoke about having rippling muscle disease, a condition in which muscles are unusually sensitive to movement or pressure.