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Nuclear Fit Relay

Take on the challenge of Nuclear Fit Relay, an outdoor fitness race designed for teams of three. This relay race tasks teammates with conquering functional fitness stations in a fast-paced, alternating format. Perfect for gym communities, friends and coworkers, it’s the ultimate test of team functional fitness and friendly competition.

Fit – Relay

16+

Intermediate

6k

16
+
July & September
If teamwork is your thing, then Fit Relay is for you!
Perfect for gym buddies, this is our classic Nuclear Fit race, run in a relay format: with a team of three people, two stations and two runs per person, you’ll swap chip timing after two stations.
How you split the runs and functional fitness stations is up to you, so long as each runner completes two each. Teams can be all girls, all men or a mix of both!

What’s Included

  • Chip timing
  • Finishers Medal
  • Free for spectators and free parking
£
July 18th July 2026
£45 Per Person
Current Price: £35.00
£
September 19th Sept 2026
£45 Per Person
Current Price: £30.00
(Prices include booking fee)

Nuclear Offers

NEXT EVENT

18TH July 2026

Days
Hours
Minutes
Next event detail arriving soon
Fit Stations

WHEEL TYRE FLIP

Distance:
Individuals/Doubles/Relay/Pro: 125M

Weight:
Women Individual/Doubles: 24kg
Men Individual/Doubles: 30kg
Mixed Doubles: 30kg

The competitor starts behind the line.  To flip the tyre they need to get into a deep squat, place hands under the tyre, maintain a flat back with their head up and power up through the legs and hips. They can use their knee to assist with the flip.  They can stop to rest. They complete this workout once the competitor and the whole tyre have crossed the line.

FARMER URN HUG

Distance:
Individuals/Doubles/Relay/Pro: 125M

Weight:
Women Individual/Doubles: 24kg
Men Individual/Doubles: 30kg
Mixed Doubles: 30kg

The competitor has to pick the urn up from the station, remembering to keep their core engaged.  The carry begins when they cross the start line.  The urn must be kept close to their chest and they can put it down at any time.  The carry is complete once the competitor and the urn cross the finish line.

PLOUGH PULL

Distance:
Individuals/Doubles/Relay: 125M
Pro: 250M

Weight:
Women Individuals/Doubles: 37kg
Men Individuals/Doubles: 70kg
Mixed Doubles: 70kg

The competitor places the reins over their shoulders and they must stand behind the line prior to starting. They must remain standing at all times, hands and knees are not allowed to touch the ground.  They move the plough (sled) by pulling and moving forward.  They can stop to rest.  The pull finishes once the competitor and the plough cross the finish line.

MILK CHURN CARRY

Distance:
Individuals/Doubles/Relay/Pro: 200M

Weight:
Women Individual/Doubles: 16kg
Men Individual/Doubles: 24kg
Mixed Doubles: 24kg

The competitor has to carry one milk churn in each hand with both arms fully extended.  The carry begins when they cross the start line.  They can put the milk churns down to rest.  The carry is complete once the competitor and the milk churns cross the finish line.

DUCK AND THROW

Distance:
Individuals/Doubles/Relay: 10 throws & 100M run with bag
Pro: 20 throws & 175M run with bag

Weight: 
Women Individual/Doubles: 22kg
Men Individual/Doubles: 32kg
Mixed Doubles: 32kg
Pro Women: 24kg
Pro Men: 32kg

The competitor picks up a bag and runs 40m to the functional fitness station.  They will then be required to throw it over the bar without any assistance, they then duck under the bar and pick up the bag and move forward into the next designated lane.  There are 10 throws in total.  They can stop to rest. The competitor picks up their bag to run 40m back towards the finish line. The workout is complete once they cross the finish line.

Squat and Lift

Reps:
Women Individual/Doubles: 75 reps
Men Individual/Doubles: 100 reps
Mixed Doubles: 100 reps
Pro Women: 125 reps
Pro Men: 150 reps 

The competitors start by sitting down on the box provided and picking up the handles. The lift begins when they stand up and raise the rack above their head, locking their arms out, this counts as one rep.  They must then sit back down onto the box. They can rest at any time standing or sitting. Each correctly completed rep will be counted by an adjudicator. The lift finishes when the competitor completes all the reps.

Features
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Functional fitness format

Participants take on unique functional fitness stations, such as tyre flips, plough pulls and milk churn carries. They are designed to test both endurance and strength.

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Training available

For those that want a little more practice before the big day, training sessions are available throughout the year to get you race day ready.

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Timing Chips

Every competitor will receive chip-timing information, with breakdowns for each run and workout station, giving detailed performance splits and clear insight into strengths, progress and pacing.

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Team and league opportunities

With Individual, Doubles and Relay options available, you can take part either individually or as part of a team. Individuals also have the opportunity to compete for Nuclear Fit League glory!

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A premium experience

Expect smooth organisation, first-class marshals, medals, photos, all part of the premium race-day experience courtesy of the award-winning team behind Nuclear Essex.

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Festival vibes

Expect a lively central arena surrounded by music, crowds, sports massage stations, a variety of stalls, free on-site parking and free spectator access, all of which creates a buzzing energy and a festival-style vibe that celebrates fitness and fun.

TOP 10 FAQ's

Can I buy gift vouchers for friends and family?
Yes — gift vouchers are available to buy online and make the perfect present for adventure lovers.
Can I wear fancy dress or costumes?
We love seeing participants racing in fancy dress and costumes! Just keep in mind that you’ll be climbing obstacles and tackling muddy, wet ditches, so choose an outfit that can handle the challenge.
How can I raise money for a charity?
Sign up to one of our races, create your own bespoke event, or design a Wild Forest mud run — then share your fundraising page with your community.
Do you charge a parking fee?
Parking is free at all sites and events, apart from Nuclear Mud Tribe, which has a £5 parking fee per car. All parking is within a short walking distance.
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How to find us

Nuclear Fit is located in Brentwood, Essex just 15 minutes from the A12, M25 and M11.

By Train and taxi, we’re just 15 minutes from Brentwood station (on the mainline from Liverpool St) or 15 minutes from Epping Underground station.

By Train and taxi, we’re just 15 minutes from Brentwood station (on the mainline from Liverpool St) or 15 minutes from Epping Underground station.