NED Sien Ter Heerdt
2 HYROX races over 2 seasons, all in a team with 2 partners. Best Doubles Women time: 1:26:41 at Rotterdam 2026.
Doubles Women: finish time, race by race
Oldest to newest; a line going down means getting fasterEach dot is one Doubles Women race. Not enough complete, clean Doubles Women races yet to measure the change. Team times are shared with a partner, so they move with who you race with.
2 results
| Race | Division | Time | Place | Runs | Stations | Roxzone | Report | |
|---|---|---|---|---|---|---|---|---|
| Rotterdam 2026 19 Apr 2026team: Charlotte Kok, Sien ter Heerdtwhole field → | Doubles Women · team 25-29 | 1:26:41 | 1052nd of 2,052340th of 586 aged 25-29 | 50:37 | 29:01 | 7:08 | View results | See splits Hide splitsSkiErg5:31faster than 6%Sled push1:31fastest 21%Sled pull3:10fastest 11%Burpee broad jump4:08fastest 40%Row5:13faster than 48%Farmers carry2:08faster than 14%Sandbag lunges3:44faster than 46%Wall balls3:36fastest 6%Runs (8 km)50:37faster than 40%Roxzone7:08fastest 43%Run 16:19faster than 34%Run 26:00faster than 30%Run 36:18faster than 32%Run 46:25faster than 31%Run 56:18faster than 39%Run 66:13faster than 42%Run 76:16faster than 43%Run 86:50fastest 47%Full report for this race → |
| Rotterdam 2025 27 Feb 2025team: Sien Ter Heerdt, Laura Van Essenwhole field → | Doubles Women · team U29 | 1:33:17 | 843rd of 1,149410th of 543 aged U29 | 55:11 | 30:49 | 7:19 | View results | See splits Hide splitsSkiErg4:44faster than 31%Sled push1:54faster than 16%Sled pull4:15faster than 34%Burpee broad jump5:36faster than 13%Row5:02fastest 50%Farmers carry1:53faster than 41%Sandbag lunges3:42faster than 37%Wall balls3:43fastest 39%Runs (8 km)55:11faster than 24%Roxzone7:19faster than 41%Run 16:42faster than 32%Run 26:34faster than 21%Run 36:48faster than 22%Run 47:00faster than 19%Run 57:00faster than 27%Run 67:00faster than 20%Run 76:50faster than 25%Run 87:21faster than 27%Full report for this race → |
How to read
Place is the position among timed finishers in the same race, division and gender; a doubles place is the team's. Runs is the organiser's official run total (it can differ from the eight laps added up by a few seconds), stations the eight stations added up, and roxzone the time moving between them. The age group is the one entered for that race; for a team it is the team’s age group. How the numbers are made.
The fastest Sien has done each station
| Part | Best | Race | Typical |
|---|---|---|---|
| SkiErg | 4:44 | Rotterdam 2025 · best of 2 | 4:48 |
| Sled push | 1:31 | Rotterdam 2026 · best of 2 | 1:51 |
| Sled pull | 3:10 | Rotterdam 2026 · best of 2 | 4:12 |
| Burpee broad jump | 4:08 | Rotterdam 2026 · best of 2 | 4:17 |
| Row | 5:02 | Rotterdam 2025 · best of 2 | 5:12 |
| Farmers carry | 1:53 | Rotterdam 2025 · best of 2 | 1:52 |
| Sandbag lunges | 3:42 | Rotterdam 2025 · best of 2 | 3:47 |
| Wall balls | 3:36 | Rotterdam 2026 · best of 2 | 4:22 |
| Runs (8 km) | 50:37 | Rotterdam 2026 · best of 2 | 49:12 |
| Roxzone | 7:08 | Rotterdam 2026 · best of 2 | 7:49 |
How to read
Each station's best across Sien's Doubles Women races, from different races, against the typical Doubles Women split. Venues differ (sled carpets, run laps, where the mats sit), so a best can owe something to the venue.
2 team partners
- Charlotte Kok1 race
- Laura Van Essen1 race
From the team results above. A name opens the search: a partner can have more than one page.
Rotterdam 2026, against 2,052 Doubles Women
Shape of the race
Further out means you beat more of the field on that part. A dent is a weak spot.
How you ranked on each station
Longer is better: the share of the field you beat.
Minutes against the typical finisher
Green, left of centre: faster than the typical Doubles Women finisher at this race. Orange, right: slower, and by how much.
The race as one bar: Sien against the typical Doubles Women finisher
The race in order, left to right. A wider block than the one below is slower than typical.
SkiErg cost 0:34 against the typical Doubles Women finisher at Rotterdam 2026. The skierg guide shows whether that is strength or pacing, and the workouts that fix it.
Fix skierg. Then beat 1:26:41.
The RoxHype app is your training plan to race day: built from your splits, your kit and your race date, and adjusted every week.
- A week-by-week plan that counts down to your race
- Extra work on your slowest stations
- Adjusts every week to what you actually did
Free to download. Used by more than 40,000 HYROX athletes.
