Can I break 16 in 5k?

Was it max effort training? Did you run it in spikes?

No didnt run in spikes

It was definitely a tough workout but I followed it up with 4*200M in ~32 seconds FWIW. It was probably about as hard as I could have ran on the given day considering I ran 25 miles in the 2 days leading up to this

You're close, not sure if you can unless you race in cooler conditions and with a bit fresher legs.

maybe

One workout isn’t gonna tell you much. When I ran 15:44 in high school, I was doing a lot of effort based workouts like 7x750m @ tempo to 30 min effort with a 100m jog or 7xKs @ 5:10-5:20 effort with half rest. Focus on LT more than anything which for a 15:50 guy would prolly be 5:25-5:30.

Few other workouts:

8x400 in 71 average, 400m rest, followed by 4*200m in 33
20 min tempo at 5/33
5*1K at 3:12, 400M rest (was 90 degrees with a 72 dew point)

15 mile long run, last 3 average at 5:45

Nah

I ran 4x1600 averaging under 5 minutes. My 5000 PR is 16:12. So I'm gonna say no, you're not quite there.

tbqh, I don't really understand how we have similar PRs because theres 0 chance I could do that workout unless I was probably taking an equal amount of rest. I feel like you should be under 16 based on that, but I'm going off my own fitness/16:14 PR here

but my PR is 15:51 and tbqh i don't want you to beat it

you will crush 16:00

that's my goal too, and if I did that workout, I be ready to go.

In better weather you could run 4:55's.

I think you are closer to 15:30 shape.

I think you're being too generous, but thanks.

You were in sub-16 shape.

OP -- I think you're there based on the conditions. That's doing 3x1600 in sub-5. Wait for better weather & get in the right race.

I think so. Before breaking 16 for the first time I believe I ran 4x1600 w/ 3' off avg. 5:07. That was very hard and then I ran 15:55 about 10 days later. Given the shorter rest and slightly faster splits I would say you can do it.

This is always the biggest key for me. If you were fading ... 5:00, 5:05, 5:10, then that's bad news. Even or improving splits are a good sign.

Splits were 5:06/5:05/5:04

I ran 3 x 1600 in 5:06,5:07, 5:05 w 3 mins standing rest and then ran 16:03 1 week later.

Go out at pace and make a commitment to start pushing from 1000 out and you should get under 16 as long as conditions are good.

I went 15:48 shortly after doing 4 x mile @ 5:08, 5:06, 5:04, 5:00 w/ 2:30 rest in between sets. I think you should be able to do it if you race tough

Physiology doesn't lie. The only true way to know is if you are a 4:40 miler and 10:00 2-miler. If you are then yes you can get close to 16:00. That's really the only way to know.