About Nuclear Fit
Nuclear Fit is the ultimate outdoor fitness race designed to test you physically and mentally. This fitness race combines six 1km trail runs with intense workouts and fitness stations, like sled pulls and tyre flips. Don’t like running? Nuclear Fit Storm has all of the fitness stations, with none of the running. It’s a fresh alternative for those looking for a fitness race and to get outdoors.
10TH May 2026
Nuclear Fit is 6 x 1km trail runs alternating with a unique functional fitness station in between each run . The fitness stations are all located in the buzzing central arena called The Core. The trail run will include 2 x 4ft hurdle obstacles. Waves start every 10 minutes and you have 2 hours to complete the race. Your chip timing tag will record your overall time and the split for each functional fitness station and each 1km run.
Individuals
Nuclear Fit is made up of a 1km trail run alternating with a functional fitness station repeated 6 times.
Doubles
Nuclear Fit Doubles is made up of a 1km trail run alternating with a functional fitness station repeated 6 times, as a combined effort with your partner.
Relay
Nuclear Fit Relay is made up of a 1km trail run alternated with a functional fitness station repeated twice per person.
Pro Wave
Nuclear Fit Pro is made up of a 1km trail run alternated with a functional fitness station repeated 6 times. It features longer distances on stations 1, 3, 5 and 6.
WHEEL TYRE FLIP
Distance: 100m
Height of tyre: Women 3ft and Men 4ft
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: 150m
Weight: Women 24kg & Men 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: 125m
Weight: Women 37kg & Men 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: 200m
Weight: Women 16kg & Men 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: 100m
Weight: Women 22kg & Men 32kg
Throws: 10
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: 100 Men, 75 Women
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.
Nuclear Fit is available for private hire — perfect for bespoke events, team challenges, exclusive training sessions, or groups wanting the full course all to themselves.
Included in this is your own dedicated instructor to guide your group, offer top tips, and help you get the most out of every fitness station.
To discuss your private hire requirements, get in contact via the button below.
Need a little preparation ahead of Nuclear Fit? Don’t worry, we have specialised classes designed to train for Nuclear Fit.
This is an opportunity to try out the stations, breaking down techniques and working on your transitions so that you can perform your best on race day.​​​​​​​​​
DATES FOR 2026 COMING SOON
A gift voucher for Nuclear Fit makes a really unique and memorable present.
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Email fit@nuclearessex.com
Can't wait to be back again.
Have been doing Nuclear Fit for the past 2 years. Have done all three dates both years, doing Nuclear Fit, Storm and Fit Pro.
This place knows how to run a fitness event, smooth registration, top quality equipment and the marshalls and judges are another level, always so supportive and cheerful, encouraging every single person that toes the start line.
Anonymous
I love the Nuclear fit races!
It’s a great, fun and accessible race for everyone from beginners to those that compete often, everyone is catered for.
Very well organised and safe, communication is great and the volunteers are so nice! Would 100% recommend doing!
Sarah Weston
Just the best experience and vibe
Organisation always on point and an awesome day out with everyone concerned creating such a fab atmosphere. I love the outdoor concept and find the overall race a great challenge. Sam and the team are always very helpful and supportive and make for a amazing day Highly recommended.
Anonymous
Nuclear Offers
Find us
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.