Engine demo · replay

A day in the Tank

2026-11-01 · engine 0.1.0 · artifact /demo-day.json

Fuel state

Ready

530.1g

of 815.5g · estimate

Quality day

One engine-computed day. Every number below comes straight from the artifact.

477–668g

Carbs

4.2L

Fluids

5,600mg

Sodium

06:00

23:00

06:00wake

Race plan

NYC Marathon

2026-11-01 · goal 4:30

60–90g/h700ml/h800mg/h

running totals

9:24

mile 2.4

Maurten GEL 100 · 25g

9:48

mile 4.6

Maurten GEL 100 · 25g

10:10

mile 6.8

Maurten GEL 100 · 25g

10:32

mile 8.9

Maurten GEL 100 · 25g

10:53

mile 11

Maurten GEL 100 · 25g

11:13

mile 13

Maurten GEL 100 · 25g

11:33

mile 14.9

Maurten GEL 100 · 25g

11:52

mile 16.7

Maurten GEL 100 · 25g

12:11

mile 18.6

Maurten GEL 100 · 25g

12:29

mile 20.3

Maurten GEL 100 · 25g

12:47

mile 22.1

Maurten GEL 100 · 25g

13:05

mile 23.8

Maurten GEL 100 · 25g

13:22

mile 25.4

Maurten GEL 100 · 25g

Caffeine 95.4mg total - heat override active: 1mg/kg cap (heat-sensitive flag plus a hot forecast). Ceiling 400mg/day.

Estimates — not medical advice