# VO2 Max: Intervals vs Sustained **URL:** \ **Category:** Training\ **Created:** [June 28, 2023, 2:52pm UTC](https://wahoox.forum.wahoofitness.com/t/vo2-max-intervals-vs-sustained/23006 "2023-06-28T14:52:32Z")\ **Posts on this page:** 1\ **Showing post:** 3
**Author:** ![JGreengrass](https://sea2.discourse-cdn.com/flex020/user_avatar/wahoox.forum.wahoofitness.com/jgreengrass/32/2628_2.png) [@JGreengrass](https://wahoox.forum.wahoofitness.com/u/JGreengrass)\ **Post date:** [June 28, 2023, 4:43pm UTC](https://wahoox.forum.wahoofitness.com/t/vo2-max-intervals-vs-sustained/23006/3 "2023-06-28T16:43:48Z")
They hit in a different way to sustained intervals for sure, as much mentally as I know I’m going to get a break every so often rather than 2+ minutes of pain. How does you HR go during the intervals, some good advice from @Coach.Neal.H here > [@rocket NEW SUFFERFEST: Rue The Day is here! rocket](https://wahoox.forum.wahoofitness.com/t/new-sufferfest-rue-the-day-is-here/18717/27): > > Hi @JGreengrass! Overall, this session should be challenging but should not be nearly impossible to finish. Training isn’t always about hitting your maximum - in fact, only on occasion should a session put you at your limit…and this one generally should never put you there. It might be good to make sure that your current FTP and MAP settings are accurate…as generally speaking, most folks will see heart rate getting into Zone 4 by around the 5th or 6th effort during these kinds of sets/efforts. … --- _[View the full topic](https://wahoox.forum.wahoofitness.com/t/vo2-max-intervals-vs-sustained/23006)._