By 
Tributes are pouring in after German bodybuilder and fitness influencer Jo Lindner, known to his 8.5 million followers on Instagram as simply "Joesthetics," died suddenly at the age of 30. Lindner's girlfriend Nicha broke the news on social media on Friday June 30, writing that he had died in her arms.
In Lindner's final Instagram post, shared a day before his death, he spoke about his experience with testosterone replacement therapy (TRT) and its effects on his health and fitness, stating that he had taken a year off from the treatment, then resumed it when he "lost [his] gains" and could not recover his own testosterone levels naturally.
"Trust me I tried to stop but be aware it might have long term effects for your life," he wrote. "Overall this post should show that even as a natural u can look amazing and y just need to get in shape!!"
The comments under the post are full of messages from Lindner's friends and peers expressing their shock and sadness at his sudden loss. Bodybuilding coach Hany Rambod wrote that he "still can't believe it," while many others described Lindner as an inspiration to others.
"Rest in peace Joesthetics," wrote trainer Neymul Hassan Islam. "You’ve been a huge inspiration, and you continue to be for the rest of us."
Trainer and fitness model Alex Eubank and professional skier and fitness influencer Deven Fagan both wrote "RIP," content creator Mike Holston wrote "Rest in heaven," while fitness model Ashwin Khullar said that Lindner will be "forever a legend."
A cause of death has yet to be clarified, although Lindner had opened up about his health in recent weeks, explaining on the YouTube show Raw Talk that he suffered from a sensitive cramping condition called rippling muscle disease.
