The pool and the swim lanes
A hybrid race in a swimming pool uses two areas, the swim lanes set aside for the race and the pool deck where the stations stand. The number of lanes decides the size of each wave, one team or one athlete per lane, and so the number of participants the day can take. The deck needs a clear path from the pool exit to each station, with machines and weights kept away from the edge. The equipment, rower, SkiErg, wall balls, kettlebells or sandbags, often comes from a partner gym, as at the Hydra Challenge in Saint-Hilaire-de-Riez, run with CrossFit Saint-Hilaire-de-Riez.
Pool supervision
In France, article L322-7 of the Code du sport requires a paid-entry pool to be supervised at all times while it is open to the public, by staff holding a state diploma. Article D322-13 authorises maîtres-nageurs sauveteurs and, since 5 June 2023, holders of the BNSSA lifesaving certificate. The French Swimming Federation's practical guide advises reading first the pool's own supervision and rescue plan, the POSS, then the use agreement when a club runs its event in a public pool.
The race does not replace that supervision, it comes on top of it. The lifeguard on duty watches the water, the judges validate the stations. A coach paid to lead a sports activity must also hold a recognised qualification, under article L212-1 of the same code. In Cesson-Sévigné, the rules of the April 2026 Aquarox® put the pool's coaches and lifeguards in charge of the race.
Outside France, the rules on lifeguards and insurance are set by each country and often by the pool itself, so the pool operator is the first person to ask.
Formats and distances
The races held in 2025 and 2026 all alternate swims with stations on the deck, but distances change from one pool to the next. The table lists the formats announced by five organisers.
| Race | Venue | Swim | Stations | Format |
|---|---|---|---|---|
| SWIMROX | Trie-Château (France) | 8 × 50 m or 16 × 50 m | 8 or 16 | Solo or pairs |
| H2ROX | Alkmaar (Netherlands) | 8 × 200 m | 8 | Solo or pairs |
| Hydrox | Waterloo (Belgium) | 7 × 150 m | 7 | Pairs |
| AQUAROX by CAO | Saint-Denis (France) | 8 × 100 m | 8 | Pairs, then solo |
| UCPA Aqua Games | Mérignac (France) | 100 or 150 m per swim | As a relay | Pairs, then solo |
Pairs dominate, with different ways of sharing the work. In Mérignac, both partners swim together and then take turns on the stations, and a solo athlete does half of the stations. Several organisers offer an entry level next to the full format, such as the SWIMROX 400 next to the 800, or the Découverte, Challenge and Expert courses in Cesson-Sévigné.
Waves and schedule
Starts go in waves set by the swim lanes. The SWIMROX in Trie-Château lists ten waves between 2 pm and 8.15 pm for 120 athletes at most, with thirty minutes to an hour between starts depending on the format. The Aquarox in Cesson-Sévigné fitted into two sessions of two hours, from 4 pm to 8 pm. A wave only starts once the previous one has cleared the lanes, so the gap between waves is set by the time of the longest format.
Timing
Times are taken in one of two ways. Without equipment, a judge enters each team's finish from a phone and the leaderboard updates with every finish. With chips, each athlete wears a waterproof active transponder on the ankle, on a neoprene strap as in triathlon, read at the pool exit. A sensor at the pool exit can also count each team's laps and add a penalty for every missing swim. The guide timing a hybrid race with chips explains how to work out the number of chips.
For organisers
Pool races on Throwdown
Throwdown brings together on one platform everything a hybrid race in a swimming pool needs, from registration to the live leaderboard, with waterproof chip timing on quote. The format, the prices and the name of the evening stay yours.
- Online registration
- Pairs, solo and levels
- Waves sized to the lanes
- QR code check-in
- Waterproof chips on quote
- Times entered without equipment
- The leaderboard on screen
- Messaging with athletes
- Invoices and visuals
When you create the competition, pick the “Hybrid race” discipline, then set your divisions and the number of pairs per wave.
Insurance and entry conditions
In France, sports clubs and companies take out civil liability insurance for their activity, under article L321-1 of the Code du sport, and article L331-9 extends that duty to the organiser of an event open to federation members. According to the Hauts-de-Seine prefecture's guidance, that cover protects the organiser, its staff and the athletes, as well as the judges. When the race takes place in a pool run by someone else, the use agreement sets the terms for the pool.
Entry conditions are written in the race rules. In Cesson-Sévigné, athletes had to be at least 13, able to swim 50 m, covered by civil liability insurance, and had to fill in a health questionnaire and a signed statement, with a parent's consent for those aged 13 to 17. SWIMROX caps the places in each session to keep supervision suited to the pool and the format.
Registration and prices
Prices on record range from 30 € for a solo SWIMROX 400 to 150 € for a pair at H2ROX in Alkmaar. A pair paid 60 € at SWIMROX 800, 74 € at the June 2026 AQUAROX by CAO and 100 € in Waterloo. In France, a council-run pool usually sells at the front desk or through its booking software, because public revenue follows strict collection rules. A privately managed centre, a club or a gym can sell online and get paid into its own account.
Upcoming dates
Announced races are gathered in the swimming pool hybrid race calendar. The count of pool races covers past editions in France since 2025, their names and organisers, and the swimming pool hybrid race page shows what Throwdown handles for this format.
Frequently asked questions
- In France, yes in a paid-entry pool. Article L322-7 of the Code du sport requires constant supervision by a maître-nageur sauveteur or, since June 2023, a BNSSA holder, for as long as the pool is open to the public. Elsewhere, the pool operator knows the local rules.
- As many as teams per wave. One lane per team or per athlete avoids overtaking in the water, and the number of waves then follows from the number of entries.
- The races on record range from 400 m in total, as 8 × 50 m, to 1,600 m, as 8 × 200 m. A short format next to the full one opens the race to less trained swimmers.
- Civil liability insurance covering the organiser, its staff and volunteers and the athletes. In France, articles L321-1 and L331-9 of the Code du sport make it compulsory for clubs, sports companies and organisers of events open to federation members.
- By hand from a phone, or with waterproof active chips worn on the ankle and read at the pool exit. A sensor at the pool exit can also count every swim.
