# 2 x 8m @113-115% or 8 x 2m @133-138% for vo2max?

**URL:** <https://forum.intervals.icu/t/2-x-8m-113-115-or-8-x-2m-133-138-for-vo2max/190>\
**Category:** Training\
**Created:** [7 January 2020 13:42 UTC](https://forum.intervals.icu/t/2-x-8m-113-115-or-8-x-2m-133-138-for-vo2max/190 "2020-01-07T13:42:09Z")\
**Posts on this page:** 1\
**Showing post:** 11

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**Author:** ![david](https://forum.intervals.icu/user_avatar/forum.intervals.icu/david/32/30189_2.png) [@david](https://forum.intervals.icu/u/david)\
**Post date:** [26 January 2020 05:42 UTC](https://forum.intervals.icu/t/2-x-8m-113-115-or-8-x-2m-133-138-for-vo2max/190/11 "2020-01-26T05:42:49Z")

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I need to look at trying 30/15s. What I did test recently is doing the “hard start” thing (first 30s to 60s or so at 120%). That got me more time at above threshold HR without losing much power. Did it for intervals 2 and 3 here.

 ![Screen Shot 2020-01-26 at 07.38.53](https://forum.intervals.icu/uploads/default/original/1X/d4f32baead4cd6111867b98bdf0d4045809c2692.png)

 ![Screen Shot 2020-01-26 at 07.39.38](https://forum.intervals.icu/uploads/default/original/1X/25ebfcda6aee856ba106af83cc0550c84f047080.png)

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