In undivided Bengal, he began to show off his body at village fairs, and he travelled across the region with circus-like magic shows. He reportedly would bend iron bars with his teeth and neck and balance the sharp edge of a sword on his belly.
At some point, he caught the eye of the British, who still ruled India, and was hired as a physical trainer for the Royal Indian Air Force. In an interview with the Indian Express newspaper, Aich remembered how that job transformed his life and set in motion events that would catapult him to stardom.
"It was 1942 and the Quit India movement had gathered considerable momentum. I had been working as a physical instructor in the Royal Indian Air Force, when I protested against the British oppression at the camp. I slapped a British officer, who made an offensive remark against the Indians during the interrogation," he recounted.
"A court-martial and jail time ensued but it turned out to be a blessing in disguise. The jailer had been very kind and allowed me to train. In fact, he encouraged it. Then, I was shifted to the Alipore Presidency Jail but release followed as India won her freedom."
Aich apparently practiced his metal-bending skills on the bars of his cell, and the guards actually encouraged his passion for bodybuilding by procuring him special protein-rich meals. In the years after India's independence, Aich began to train more vigorously and eventually began raising money for travel expenses to take him to London to compete in 1951's Mr Universe competition.
He lost that year but caught a lucky break by getting a job with British Railways, which allowed him to stay on in London and train for the following year's competition, which he won. He was 40 years old when he lifted the trophy.
Upon his return to India, he devoted his life to training up-and-coming bodybuilders and opened a fitness club. Four years ago, on the eve of his 100th birthday, despite having suffered a stroke a year earlier, he posed for cameras and wowed India again with his still-impressive, albeit wrinkly, biceps.
"I didn't become rich. There is not much money in bodybuilding," Aich told the Indian Express on that day. "But there is respect. And for that, I wouldn't mind being a bodybuilder in my next life as well."