by Matt Peters How does Spider-Man keep his legs and core flexible? How does the Human Torch warm up his arms and shoulders before he puts his strength and endurance to the test? Matters like those don’t lend themselves to flashy comic book covers, but they fill the pages of one of Marvel’s more unusual projects from the 1970s, Stan Lee Presents: The Mighty Marvel Strength and Fitness Book. Writer-editor Stan Lee had a knack for finding new ways to connect to readers. In the 1960s, he helped build the Marvel brand by bringing a new take to the superhero… Read More