Let’s say you run as fast as you can for a minute. The first 10 seconds or so are pretty easy, but then you can’t run as fast anymore. With each passing moment your muscles burn a little more, and…
Let’s say you run as fast as you can for a minute. The first 10 seconds or so are pretty easy, but then you can’t run as fast anymore. With each passing moment your muscles burn a little more, and…