Correction: This story has been updated to reflect Vice President Joe Biden's current age. As of 3/9/20, Joe Biden is 77.

After he canceled three presidential campaign events in September in order to rest his voice, Sen. Bernie Sanders made a pledge to release his medical records before the Iowa caucus on February 3rd, NBC News reported.

That was before he suffered a heart attack on Oct 1. Still, Sanders has made good on his promise. He released letters on Dec. 30 from his primary physician and two UVM cardiologists that said he's healthy, able to campaign without restriction and fit to serve as president.

Fellow septuagenarians Joe Biden and Sen. Elizabeth Warren also pledged to release their medical records before the Iowa caucus, and both have come through on that promise.

At age 78, the Vermont senator is the oldest candidate in the race for the Democratic nomination and would be the oldest person ever elected president. Both Warren and Biden would also take that title at 70 and 77 respectively, beating out President Trump, who is currently the oldest ever inaugurated.

The director of cardiac rehabilitation at the University of Vermont said Sanders was able to exercise at "a level that is 50% higher than other men his age with a similar diagnosis," the letter said.

A letter from the attending physician of the United States Congress, Brian P. Monahan, said Bernie was in good health and has been "engaging vigorously in the rigors of (his) campaign, travel, and other scheduled activities without any limitation,” Monahan wrote.

According to the letters, Sanders has been treated in the past for "gout, hypercholesterolemia, diverticulitis, hypothyroidism, laryngitis secondary to esophageal reflux, lumbar strain, and complete removal of superficial skin lesions." He's had surgery on left and right-side inguinal hernias as well as a cyst removed from his vocal cord.

Sanders takes five medications, including atorvastatin, aspirin, clopidogrel, levothyroxine, and lisinopril.

Sanders' doctors say his lab work was normal, and his exercise test results were average for men his age. Perhaps we'll spot him around the neighborhood this summer sharing in America's favorite pastime, as we did in June:

Email Isaac Fornarola at ifornarola@freepressmedia.com. Follow him on Twitter: @isaacforn