At the age of 70 in 1984, Jack, while handcuffed and shackled, towed 70 rowboats for one mile across a harbor in California.
At the age of 42, he did 1,033 push-ups in 23 minutes, and three years later, he did 1,000 chin-ups (and 1,000 jumping jacks) in less than 90 minutes.
1,000 chin-ups.
Exercise in Peace, Jack. 1914-2011
