Healthstream Treadmill What Is The Difference Between Treadmill Continuous HP And Peak HP?

What is the difference between Treadmill continuous HP and peak HP? - healthstream treadmill

I saw a lot of treadmill list of sites with their online-shopping-HP machine continuously as odd.
You can sample the following websites:

http://www.yorkfitness.com.au

http://www.healthstream.com.my

http://www.lifespanfitness.com.au

Not sure the number is still expected to pay more attention? and what is it? Thank you in advance.