How has Jakob improved his kick? And what would be his 800m time now?

that has nothing to do with 800 speed imo.

He his just the best, meaning he has some margin and is fresher than his opponents at 1400m, so he can close faster, not because he has the best raw speed but because he is the one who can use the max % of his raw speed in the last 100.

800 speed is usefull for kicking in 3:40+ races not sub 3:30 races.

I bet his 800 is still not much faster than his PB, maybe a little improvment like mid 1:45.

The answer is easy: He grew up (he is close to being a fully grown man now even though he - opposite his older brothers - haven´t been sporting a beard yet).

But even as a teenager his finishing speed was underestimated, just ask Centro, Engels, Hoare, Kipsang and Kerr. None of them have ever been able to outsprint Jakob.

Solid take. I wouldn't be surprised if Jakob went on a tear after losing to Wightman, hitting the weights, adding in more sprint training, etc. That's on top of his incredible engine.

He could hit 1:44, I'm certain. Possibly 1:43 in the right race.

He didn't improve his speed. He improved his speed/endurance in that distance and he know what pace he is able to do.

That's the thing that was lacking to someone like Girma who just run 3 days ago.

Those saying Jakob could run 1:43 are out of their minds. We have no evidence of that. Improvement over 1500m does not mean his 800m got faster. If anything, give t the type of runner Jakob is and how he trains, it means his 5,000m is better. Evidenced by his 2 mile WR.
I don’t think his kick has improved. What’s happening is he is pulling away from guys in the last 100m of 3:27/28 races. Nobody else in the world can run that fast right now. So guess what? When they hit 100m to go, they’re gassed and Jakob still has more in the tank.

1:45 low

You are correct. Slow people talk about this endlessly.

But he out-kicked Nguse in a 3:32.6 race. And he got out-kicked by Wightman last year in a 3:29.2 race.

Probably not 1:43. 7:54 plus 1:43 puts him at a 3:25 mid 1500m according to statsgansta.

1:44 puts him in the 3:26 range which is more realistic. Anyone saying he couldn’t break 1:46 os crazy though.

However, the flip side of that being I don’t think he has world record 5k/10k ability like everyone else seems to. Komen had less 1500m speed than Jakob and barely broke 12:40 with the same 3k ability.

Jakobs probably:

800m- 1:44.5

1500m- 3:26.9

3k- 7:19

5k- 12:40-12:41

10k- 26:40-26:45 (This is the distance his ability is most over estimated on by this board)

Improving your 800m time doesn’t really mean improving your kick in a 1500m race.

And you surely don’t have to post an improved 800m time to be faster.
It may give the runner confidence, but that’s all mental. The workouts give you confidence as well.

Your kick depends on energy use throughout the race.
If two runners are equal and one sits directly behind the other until 100m to go, the leader will get out kicked.
If the follower gets trapped in boxes, has to break and speed up a lot or go wide on turns, he will not catch the leader.

Being clearly fitter than the field will result in wins, almost any way you run it.
Being barely fitter means tactics will come into play. Better energy use in a race means a better kick in a 1500.
You will often see a slower 800 runner out kick a fast 800 runner in a slow 1500 race.
(see Rio)

Hicham was the same. He’d grind out the pace just like Jakob except he would get to 1200 even faster. That’s what Jakob needs to do. Take a bigger risk. Go out in 54 high / 55 low and keep it as even as possible.

Maurten bicarb

He’s strong enough now to set a grueling pace for the first 1200 or so of a race and have more in the tank than everyone else with 300 to go.

In order to kick at the end of a race you have to have something left to kick with. You might go through 1200 in 2:46-2:48 but then do you have enough in the tank to go faster the last 300? Jakob does and that’s why his kick is better.

He’s probably still around a 1:45 800M runner at best.

True, throughout my career I had no problem out-kicking runners who were "faster" than me.

he would have to put down the lactate meter to run faster than 1:45

With little bit of concentration on the event, he should be able to run around 1:45.0.

Unless you know details of J Ingebrigtsen's training, we can't make an analysis of his 800m potential. We certainly can't make an analysis of his 800m potential based on 1500m races in 3:27.xx to 3:32.xx range. So far this summer, J Ingebrigtsen is the most fit 1500m man in the world. He's not finishing raced with a sub-12 final 100m. Why do you assume his kick reflects fast 800m potential? I've been out kicked numerous times in XC races 2 miles and longer by guys with inferior speed, events 1/2 mile and shorter distances.

If you look at the Lausanne finish, you'll see Jakob covered the last 10.6 seconds in 38 steps, for a cadence of about 3.6. Girma's last 37 steps took him 11.5 seconds, a cadence of only 3.2 - barely faster than the normal 3.0 for the earlier portions of a mile + distance race.

Kerr's last 38 steps took 11.6 seconds, also a 3.2 cadence. These guys have the same problem Jakob used to have - stuck in distance loping mode. Jakob has indeed fixed his kick.