The 42-year-old batsman became the sixth oldest player in Test history to slam a ton and took Pakistan to 282 for six at stumps on the opening day. He was unbeaten on 110.
Immediately after Misbah scored his maiden Test ton at Lord's and career's 10th, Misbah dropped on the turf and performed 10 push-ups.
When asked about his gesture, which included a salute to the Pakistan flag flying above the Pavilion, Misbah said, "I promised the army guys I would do the push-ups if I got a century."
"We had an honour code on the boot camp, for push-ups, so that was my promise to them the next time I scored 100. So that was for them, and the salute was for the flag," added Misbah.
Pakistan had a gruelling pre-tour boot camp at a military academy in Kakul in May.
Former cricketers, present Pakistan players and several cricket experts hailed Misbah's gritty century at the historic venue.
Twitterati saluted the Pakistani batsman for his remarkable achievement:
Imagine what Misbah could have contributed if his talent had been groomed earlier! Such a tragic waste of potential.— Imran Khan (@ImranKhanPTI) July 14, 2016
Great inning by Misbah Ul Haq well done pic.twitter.com/1PqTmbp9sx— Saeed Ajmal (@REALsaeedajmal) July 14, 2016
So glad for Misbah for coming back to the place he was caused to be captain and then stamping his authority with an honors board effort!— Roshan Abeysinghe (@RoshanCricket) July 15, 2016
For Leander Peas & Misbah-ul-Haq there is still a life in sports after 40! #lifeafter40— Mohandas Menon (@mohanstatsman) July 14, 2016
77% of Misbah-ul-Haq's Test runs have come as captain...— Mohandas Menon (@mohanstatsman) July 14, 2016
3450 runs as captain
4458 runs overall#EngvPak
Love Misbah.. Unlike for most others nothing's come easy but the determination and strength of character is amazing .. Well done Bhai !!!— Russel Arnold (@RusselArnold69) July 14, 2016
Misbah: I promised army guys, if ever I score a 100, I'll definitely do 10 push-ups to remind you that we were there pic.twitter.com/iT2cjhbbM8— Cricketopia (@CricketopiaCom) July 15, 2016