An 8-week VO₂ max training plan for runners

Raise your ceiling in an 8-week block: two interval sessions a week on top of easy running, the Norwegian 4×4 twice at first, then the 4×4 and the Billat 30/30.

Last updated 4 September 2026

Woman in a black sports bra and leggings sprinting on a paved rooftop running track, arms driving, both feet off the ground, construction cranes and city buildings in the background.

The plan

Duration
8 weeks
Runs per week
5
Easy runs
45 minutes in Zone 2, two a week
Long run
90 minutes in Zone 2, once a week
Interval sessions
Two a week: the Norwegian 4×4 both times in weeks 1 to 4, the 4×4 and the Billat 30/30 in weeks 5 to 8
Weekly running time
About 4 hours 20 minutes, every week
Progression
The second interval session changes from the 4×4 to the 30/30 at week 5, and nothing else moves.

What running sessions does the week include?

Two easy Zone 2 runs, one Zone 2 long run, and two interval sessions. That's five runs a week, and the count holds for all eight weeks.

The three Zone 2 runs, one of them the long run, are the floor of three to four Zone 2 runs a week. Two interval sessions a week is the 4×4 guide's figure, and this plan runs it in both phases. If interval running is new to you, start the block the way the guide starts you.

This week is the base plan's week 8 with the Saturday easy run traded for a second interval session, the 4×4 moved to Tuesday, and the long run held at 90.

Easy runs are 45 minutes. The long run is 90 minutes every week, and we hold it there because the block's load is in the intervals. The long run's job in this block is to hold the base rather than build it.

The easy runs and the long run are the base, and the two interval sessions are the ceiling work that stands on it. Rest days are where everything else you train goes.

What do you run in weeks 1 to 4?

The Norwegian 4×4 twice, Tuesday and Friday, around three Zone 2 runs. Weeks 5 to 8 repeat this week.

Tuesday and Friday put three days between the two sessions, and each one sits two days from the long run. That's the spacing the 4×4 guide asks for.

The last Friday of the phase goes to the trial because it sets the 30/30's pace before the second phase starts.

You can run the Norwegian 4×4 and the Billat 30/30 in RunBeat's Timed Intervals:

Timed Intervals in RunBeat RunBeat calls every work and rest phase, and your Apple Music playlists switch with it.

What do you run in weeks 5 to 8?

The Norwegian 4×4 on Tuesday and the Billat 30/30 on Friday, around the same three Zone 2 runs. Week 5 is the only week where anything changes, and the change is Friday.

The 30/30 takes the second slot because it's the session whose pace you set yourself and hold rep by rep. The 4×4 has no pace to give you.

The 30/30 runs once a week. Friday keeps it three days from the 4×4 and two from the long run, the spacing its guide asks for. You start it at the rounds its guide sets and stay there.

How many weeks should a VO₂ max block last?

8 weeks, in two phases of four. That's the top of the 6 to 8 weeks the 4×4 guide runs its block for.

We split it at week 5 because the second phase runs the Billat 30/30, and that session's guide runs its own block from 4 weeks. The first phase needs its own four weeks of the 4×4 before the swap. A 6-week block would leave the 30/30 phase short of its guide's floor.

No study we'd cite says how many weeks a VO₂ max gain takes to arrive, and this plan doesn't put a date on it.

How do you know the block is working?

By what the two interval sessions show you. There's no test on this plan and no VO₂ max number to check.

In weeks 1 to 4 the signal is the speed that puts you in the 4×4's band. That speed is yours, and it isn't the same for all four intervals. A higher ceiling makes the same pace cheaper. The block is working when the same speed sits lower in the band, or when the band takes a faster speed. Finishing able to run a fifth interval is the 4×4 guide's check that you ran the session right, and it says nothing about the block.

In weeks 5 to 8 the check is the 30/30's own: holding the round count its guide sets at the trial pace.

After the block, run the 6-minute time trial again to set the next block's pace, and you'll have a second distance beside the first.

The VO₂ max number on a watch is an estimate.

What do you do after the block?

Drop to one interval session a week, the 4×4 guide's figure for holding what the block built.

The week to go back to is the base plan's week 8: one 4×4 and four Zone 2 runs.