“I CAN GIVE YOU MASSIVE ARMS, BROAD SHOULDERS, AND A GIANT SIZED CHEST IN JUST FOUR WEEKS,” the Body-Tone pamphlet promises. It is the “World’s Fastest Strength and Muscle Building System.” It cost $US20 in the late 1950s, but I found the text of the program in the Stark Center Archives. I am ready to…
Most fitness-minded people have probably heard of fast- and slow-twitch muscle fibres. However, the distinction can be somewhat mysterious, especially in the context of understanding how it relates to our ability to do endurance versus sprinting, and our body’s ability to develop one versus the other, depending on our training.