Your running pace is usually measured by your average mile time, or at least, by what I understand. I'm a competitive distance runner, so I'm also familiar with the term Race Pace - which is the pace you run at during a race. These are different.
Young hippos can only stay under water for about half a minute, but adults can stay submerged up to six minutes. Source(s): http://www.awf.org/wildlives/140 johnslat Â· 1 decade ago
When submerged underwater, hippos can hold their breath for 5 minutes or even longer if needed. Hippos have nostrils located on the top of their heads, which allows them to breathe even if the rest of their body is under water.