Why Cramp Hits in the Water, Where It Strikes Bodyboarders Most, and How to Prevent It During Long Surf Sessions and Bodyboarding Trips
It’s nightfall in the Alps. The only thing separating the trail from the darkness beyond is the narrow beam of my head torch and the distant lights of a few runners snaking through the mountains ahead. I’m 70km and 11 hours into a 100km ultra marathon through France, Italy and Switzerland when I feel it, that first tightening deep in my groin.
Then both hip abductors seize completely.
Not a warning twitch. Not a slight stiffness. Full lock-up.
Normally this happens near the end of a race, when the finish line is close enough to drag yourself toward on pure stubbornness. But this time I’m alone in the forest with at least another seven hours still ahead of me. My running form instantly deteriorates into something resembling the waddling penguin walk my three-year-old does after filling his nappy.
I stop. Swear into the darkness. Then, after waddling a painful 500 metres, I finally reached the next checkpoint, a warm tent thick with the smell of tiger balm, sweat and chicken soup. I strip off damp cold clothes, refuel with electrolytes, shovel down bananas and salty snacks, then frantically rub arnica into my hip abductors before vigorously massaging life back into my legs.
Then I head back out into the night.
Slowly, the muscles begin to release. The running returns. By 2am, I cross the finish line in a strong time, moving well again, and without another cramp in sight.
But what does any of this have to do with bodyboarding?
Quite a lot, actually.
Because the exact same things that trigger cramps deep into an ultra marathon also show up during long bodyboarding sessions and bodyboarding holidays; fatigue, dehydration, cold, muscular overload, poor recovery and pushing harder than your body is prepared for. The only difference is that in the ocean, cramp can arrive while you’re fighting currents, paddling for a wave, or duck diving a cleanup set.
Every bodyboarder knows that feeling: calves tightening after hours of kicking, toes curling inside fins, hamstrings threatening to seize halfway through a spin, late in the session.
In this blog, we’ll look at what cramps actually are, why bodyboarders are especially prone to them, the most common cramp hotspots in the surf, and what you can do before, during, and after a session to stop cramps ruining your time in the water. We’ll also share insights from professional bodyboarders as well as members of our Bodyboard Holidays Community WhatsApp group, where a recent discussion on this very topic generated a wealth of comments, experiences, and practical advice that ultimately inspired this article.
What Actually Is a Cramp?
A muscle cramp is, at its simplest, an involuntary and often sudden contraction of a muscle that you can’t consciously relax. It tightens hard, usually without warning, and can range from a brief spike of pain to a sustained lock that forces you to stop what you’re doing entirely.
For bodyboarders, cramps most commonly show up in the calves, feet, arches, toes, and sometimes the hamstrings. These are all the muscle groups doing the constant work of paddling, stabilising, stalling and adjusting your position on the board such as when doing a 360 spin. Once one of them seizes, it can feel like the entire session gets taken away in an instant.
Most cramps last anywhere from a few seconds to a couple of minutes, but the after-effects can linger much longer. A lingering tightness or vulnerability that makes you hesitant to push hard again straight away.
There isn’t one single cause. Most sports medicine research suggests cramps are usually multifactorial, with neuromuscular fatigue playing a central role alongside hydration and electrolyte imbalance. In other words, the muscle has typically been pushed beyond its ability to properly recover and regulate itself in the moment.
Cold water can make this worse. When your body cools down, blood flow to the muscles decreases slightly, which can reduce efficiency and make them more prone to tightening under stress. This is one reason cramps often feel more sudden and severe in colder surf conditions.
The concept of fatigue-driven cramping is well documented in sports science literature, including work published in journals such as the British Journal of Sports Medicine and the Journal of Athletic Training, both of which highlight neuromuscular fatigue as a key trigger in exercise-associated muscle cramps.
Understanding that is only half the picture. The real story becomes clearer when you look at what bodyboarders are actually doing in the water, and why our setup makes us especially vulnerable to cramp in the first place.
Why Bodyboarders Are Especially Prone to Cramp
If cramps are the result of fatigue meeting overload, then bodyboarding essentially stacks the odds against you. The sport demands constant lower-body engagement in an environment that also drains energy faster than most people realise. Unlike land-based training, there’s no real “off switch” between efforts but rather a continuous mix of adjustment, kicking, and explosive leg movements when executing manoeuvres.
“Cramps are one of the most prevalent physical issues in our sport. No one is immune…me included. The most common for me is calf cramps which happen when I kick very hard from a cold start”.
Fin Use and Constant Calf Engagement
The biggest difference between say surfing and bodyboarding comes down to the fins.
Bodyboarders kick constantly. Even when you think you’re resting between waves, your legs are rarely fully relaxed. The fins keep the calves under near-constant tension through repetitive plantar flexion. The pointed-toe position that drives propulsion through the water. Over time, this creates a steady load through the calves, feet, arches, and toes that builds quietly throughout a session.
Duck diving adds another layer. Each dive forces a sharp, forceful compression through the lower legs, followed by an explosive kick to reposition. Long paddles out back can turn into extended periods of continuous kicking, especially in difficult conditions. Unlike surfing, where arm paddling dominates and the legs are relatively passive, bodyboarding turns the lower body into a primary engine.
By the time fatigue starts to accumulate, those small repetitive movements become the exact trigger points for cramp.
Bodyboard Trip Overload
Cramp risk doesn’t just come from what happens in the water, it builds across the entire trip.
Most bodyboarders arrive on a Bodyboard Holiday already carrying some fatigue, then immediately ramp up the load. One session at home suddenly becomes two or three in a single day, often in stronger surf, warmer climates, and longer days, while recovery quietly disappears.
Add travel into the mix and things stack up quickly: disrupted sleep, long days in the sun, alcohol, inconsistent hydration, and the urge to surf at every opportunity. Even small deficits in sleep and fluids begin to compound. When travelling internationally for Bodyboard Holidays, I make a conscious effort to drink far more water than usual on flights and regularly top up electrolytes too. Air travel dehydrates you far more than most people realise, and arriving already behind on hydration is one of the easiest ways to invite cramp into the first few sessions.
Cold Water and Muscle Tightening
Cold water changes how muscles behave under load.
As body temperature drops, circulation to the extremities can reduce slightly, and muscles tend to feel tighter and less responsive. That combination makes fatigue arrive faster and reduces the margin for error before a cramp is triggered.
“Cramp is something I have struggled with, especially in colder water and I feel you need some key fundamentals. Long sessions need smart prep: bananas for potassium, water for hydration(usually with added electrolytes), and ease off the coffee if you want to keep the cramps away.”
This is especially relevant in colder surf destinations like Ireland, the UK, and South Africa, where long sessions in cold water are common. What feels manageable in warm water becomes far more demanding when muscles are battling both fatigue and temperature stress.
The result is often the same: earlier onset of tightness, reduced control, and a higher likelihood of sudden cramping during effort spikes. Growing up bodyboarding on the UK’s chilly south coast (6℃ in the depths of winter), cramp felt less like a possibility and more like an inevitability.
Heavy Kicking in Currents
Finally, there’s the ocean itself.
Bodyboarders spend a lot of time dealing with water movement that demands short bursts of high-intensity effort. Strong rips require powerful kicking just to hold position. Late take-offs often mean explosive acceleration from a standstill. Heavy hold-downs or repeated wipeouts can leave you swimming hard just to regain control.
These are not steady, controlled movements, they’re reactive and intense. That’s exactly the type of effort pattern that accelerates neuromuscular fatigue in the calves and feet.
And once fatigue meets repetition, cramp stops being a possibility and becomes a very real outcome.
Where Bodyboarders Commonly Get Cramp (and Why It Happens There)
Once cramp takes hold, it rarely feels random. It tends to target the same muscle groups again and again, especially in bodyboarding where the movement patterns are so repetitive. Understanding where it hits, and why, makes it much easier to spot the warning signs before a full lock-up happens, like it did to me in the Alps.
Calves (the first to go)
The calves are the most common cramp point for bodyboarders, and it’s not hard to see why.
They’re under constant load from paddling, held in a shortened, flexed position through plantar flexion for long periods. Every kick engages them again, whether you’re paddling out, chasing a wave, or holding position in the lineup. Unlike land-based training, there’s rarely a true recovery phase for the muscle during a session.
Once fatigue builds, the calf can tip from “working hard” to “fully locked” in a matter of seconds, often mid-kick or just as you’re trying to push into a wave.
Feet and Toes (small muscles, big problems)
Foot cramps are particularly common in bodyboarders using stiff or tight fins.
The toes are constantly gripping and stabilising inside the fin pocket, especially in heavier surf where control matters more. Over time, the small intrinsic muscles of the foot become overloaded from this constant stabilisation effort.
It often starts subtly, a tightening in the arch or toes curling slightly, before escalating into full foot cramp that can make fin control almost impossible.Cold water and poor-fitting fins make this significantly worse, as both increase tension in already overworked muscles.
Hamstrings (the delayed reaction)
Hamstring cramps tend to show up later in a session or during longer surf trips when fatigue has really accumulated.
They’re usually linked to repeated explosive kicking, especially when sprint paddling for waves or driving hard through whitewater when paddling out. Unlike calves and feet, hamstring fatigue is often less obvious until it suddenly isn’t, and when it goes, it can shut down kicking power almost instantly. Because they’re part of the larger posterior chain, hamstring cramps often signal that overall leg fatigue is already well advanced.
Hip Flexors and Lower Back (the hidden overload)
Less talked about, but increasingly common in longer sessions, are cramps in the hip flexors and lower back.
These muscles work continuously to keep the bodyboard position stable, especially when paddling or in the trim position. They also help coordinate kicking mechanics, meaning they never fully switch off during a session.
When fatigue builds, they can tighten in a way that affects posture and movement efficiency, indirectly increasing strain on the calves and hamstrings too. This is often where bodyboarders start to feel “stiff” or out of rhythm before more obvious cramping appears elsewhere.
The pattern behind it all
Across all of these areas, the pattern is the same: small, repetitive muscle contractions performed under fatigue, with limited recovery time in between.
Cramp doesn’t usually appear in isolation. It tends to move through the body in a sequence, from calves and feet first, then into hamstrings and supporting muscle groups as fatigue deepens. Understanding that progression is key, because it gives you a chance to react before a full lock-up ends your session.
Common Causes of Cramp in Bodyboarding
If bodyboarding creates the conditions for cramp, this is where the trigger actually gets pulled. It’s rarely one single factor. More often, it’s a combination of small imbalances and accumulated stress that quietly build until the muscle simply can’t cope anymore.
Dehydration (but not in isolation)
Dehydration is often blamed first, and while it definitely plays a role, it’s rarely the whole story.
On a bodyboard trip, it’s easy to underestimate fluid loss. Long sessions in the sun, salt water exposure, and constant movement all contribute to gradual dehydration, often without obvious thirst signals. By the time cramps appear, hydration levels are usually already behind where they should be.
But it’s important to understand this isn’t just about “not drinking enough water.” Dehydration tends to amplify fatigue and reduce muscular efficiency rather than directly causing cramp on its own.
Electrolyte imbalance
Alongside fluid loss comes electrolyte depletion, particularly sodium, potassium, and magnesium.
These minerals play a key role in muscle contraction and relaxation. When levels drop, the neuromuscular system becomes less stable, making muscles more likely to misfire under load. That’s when a normal contraction can tip into an uncontrolled cramp.
This is especially relevant on surf trips where sweating is constant but replacement is inconsistent, a common pattern when people rely only on plain water instead of balanced hydration.
On one of our Portugal bodyboarding camps, a group of guests from Hawaii had an unusual fix for cramps: whenever one hit, they’d paddle in, down a small sachet of mustard, then head straight back into the surf.
Poor conditioning and movement inefficiency
Another overlooked factor is simply not being conditioned for the specific demands of bodyboarding.
General fitness doesn’t always translate. Someone might be strong or aerobically fit, but still lack the calf endurance, ankle mobility, or lower-leg resilience needed for long fin-heavy sessions. Small inefficiencies in technique, overkicking, excessive tension in the feet, or body in the trim position, all increase energy cost per wave.
Over time, that inefficiency accelerates fatigue and increases cramp risk.
Equipment issues (especially fins)
Fins are often the silent contributor.
If they’re too tight, circulation is restricted and muscles fatigue faster. Too loose, and the feet overcompensate by gripping harder. Stiffness also matters, very rigid fins demand more from the calves, especially in longer sessions or stronger surf.
Even small mismatches in fin fit can quietly increase muscular strain across an entire session.
“Of course there are things that can reduce your chance of cramping. A proper-fitting pair of fins that have a blade stiffness commensurate with your fitness level.”
The bigger picture
In reality, cramp is almost never caused by one thing alone. It’s usually the intersection of fatigue, hydration status, electrolyte balance, and mechanical load, all converging at the worst possible moment.
And in bodyboarding, those conditions are easy to reach without even realising it, especially on long, committed surf days where the focus is simply on staying in the water for as long as possible.
How to Prevent Cramp Before a Session
Most cramp prevention happens before you even touch the water. Once you’re already paddling out, you’re managing risk rather than avoiding it. The real difference between a session cut short by cramp and a long, productive surf often comes down to a handful of simple habits done consistently before you paddle out.
Hydrate properly (and think beyond water)
As mentioned above, hydration is the foundation.
The best approach starts the days or nights before. Arriving at a session already slightly dehydrated is one of the easiest ways to accelerate fatigue in the water. Add in a long travel day, poor sleep, or a few drinks the evening before, and you’ve already shifted the odds against you.
It doesn’t need to be complicated: consistent fluid intake, electrolytes where possible, and avoiding heavy alcohol consumption before big surf days all make a noticeable difference. On our Costa Rica Bodyboard Holidays, we’ve even got into the habit of drinking fresh coconut water straight from coconuts cut from the beach palms, a natural electrolyte hit that’s become part of the post-surf routine.
A hack I took from trail running was to make my own electrolyte drinks instead of spending on expensive electrolyte powders and drinks. Essentially, mix water, freshly squeezed lemon juice, honey and salt.
“Of course those “bio-hacks” like eating bananas, sucking down a packet of mustard, making sure you’re hydrated, drinking pickle juice.”
“Put Himalayan or Celtic salt in water (all the time, not just when exercising) as it helps your body absorb water you drink so you don't pee it out & you stay more hydrated all the time.”
Warm up before entering the water
Warm up before entering the waterOne of the most overlooked parts of bodyboarding is the warm-up.
Most people go straight from sitting, driving, or walking on the beach into a full-intensity paddle heavy session. That sudden jump in workload is exactly what fatigues muscles early.
A short land-based warm-up prepares the calves and ankles for what’s coming. Simple movements work best: calf raises to activate the lower legs, ankle rotations to loosen mobility, leg swings to open the hips, or even a light jog along the beach. The goal isn’t exhaustion, it’s activation and getting the blood flowing.
Importantly, this should be an active, mobile warm-up rather than long static stretching, which can sometimes leave muscles feeling less reactive before intense exercise. Longer static stretching is generally more effective after a surf, when the goal shifts from activation to recovery.
By the time you hit the water, your muscles should already feel switched on, not shocked into work.
“In addition to warming up on the sand, when I am in the water, I try to gradually increase my kick speed rather than blasting a quick start and that helps.”
Stretching and mobility (focus on key areas)
Mobility doesn’t need to be lengthy, but it does need to be targeted.
For bodyboarders, the priority areas are the calves, hamstrings, hips, and feet, the same muscle groups absorbing most of the load during paddling and duck diving. Tightness in one area usually increases strain elsewhere.
Calf and foot mobility are especially important, as even small restrictions can increase tension inside the fin pocket. Hip mobility also helps reduce compensatory strain further down the chain.
A few minutes of focused stretching between sessions can significantly reduce fatigue build-up over time. I swear by the mantra: little and often. Very few people genuinely enjoy stretching, and those who say they do are probably lying. Rather than setting yourself up to fail with two-hour mobility sessions each week, aim for consistent 10–15 minute daily routines while watching TV or winding down in the evening.
“Stretching properly pre and post is like 90% of the job.”
Build surf-specific fitness
General fitness helps, but cramp resistance comes from adapting to the specific demands of bodyboarding.
Swimming builds aerobic capacity and shoulder endurance. Cycling develops leg stamina without impact stress. Swimming with fins is particularly relevant, as it closely replicates the continuous lower-leg engagement of bodyboarding. Mobility and stability work round it out by improving efficiency in movement. I often suggest to those who live far from the ocean to ask at their local pool if they can use swim fins in the pool to practice paddling for the weeks running up to a Bodyboard Holidays’ coaching camp. .
The goal isn’t just to get fitter, it’s to condition the exact muscles and movement patterns that are most exposed in the water.
“Strengthen the muscle that keeps cramping so it doesn't get as tired - both concentric & eccentric exercises. Because tired muscles cramp more easily.”
Ease into surf trips
One of the most common mistakes we see on our Bodyboard Holidays is our guests doing too much, too soon. I always say in our welcome meetings, that the week is a marathon and not a sprint.
I appreciate that after travelling, it’s tempting to maximise every available session. But jumping straight into multiple long sessions on day one or two often leads to accumulated fatigue that carries through the rest of the trip.
A better approach is progressive load: start with shorter or fewer sessions, allow the body to adapt, and build intensity over the first few days. Recovery is part of performance, not a break from it.
Use the right equipment
Equipment plays a bigger role in cramp prevention than most people realise.
Well-fitted fins are essential. Too tight and they restrict circulation, increasing fatigue in the calves and feet. Too loose and the feet over-grip to compensate, which leads to unnecessary tension in the toes and arches.
Fin stiffness also matters. Stiffer fins generate more power but demand more from the lower legs, especially during long sessions or weaker conditions where more kicking is required.
Fin socks can also help by improving comfort and reducing pressure points, particularly in colder water where the feet are already working harder to maintain warmth and control.
To ensure the perfect fit, be sure to check out this video from our Celebrity Coach and ebodyboarding owner, Jay Reale.
The key takeaway
Cramp prevention isn’t about one perfect fix. It’s about reducing the load before it accumulates, through hydration, preparation, gradual conditioning, and smart decision-making on surf trips.
The less your body has to “catch up” once you’re in the water, the longer you can stay out there before fatigue turns into cramp.
“I have a concoction of 1 banana + a daily dose of electrolytes in a milkshake that I down about 30 mins before going in. I also do 40 secs calf stretches for each leg plus I'm stretching those muscles throughout the day.”
What To Do If Cramp Hits in the Water
Even with the best preparation, cramp can still happen. When it does, what matters most is how you respond in the moment. Panic is what turns a manageable situation into a dangerous one, especially in heavier surf or deeper water.
The first thing is simple: stay calm.
Cramp feels dramatic because it’s sudden and intense, but it’s rarely something you need to fight against immediately. The priority is to get into a position where you’re supported and not expending unnecessary energy. Your board is your best tool here, use it for buoyancy straight away. Lie across it, hold onto it, and let it take your weight while you assess what’s happening.
If it’s a calf cramp, the most common for bodyboarders, gently pulling your toes upward (towards your shin) can help lengthen the muscle and reduce the contraction. It won’t always release instantly, but even small adjustments can ease the intensity. For foot or arch cramps, easing pressure out of the fin and relaxing the foot rather than forcing movement often helps more than trying to “kick through it.”
“Cramping in the water is the worst. Usually calf cramps get me and I’ll have to bend back my foot to try to relieve the pressure, but not easy when floating in the foam dodging the set waves.”
The key is to avoid fighting the water while the muscle is locked. Continuing to kick hard or push against the cramp usually makes it worse and burns energy you may need for getting back to shore.
If the cramp doesn’t ease quickly, or if conditions are heavy, don’t hesitate to signal for assistance. There’s no pride in pushing through a situation that could escalate. Most experienced surfers and bodyboarders will recognise the signs immediately and help if needed.
In stronger surf, position yourself so you’re not getting pushed into impact zones while the cramp is active. Use the board to float, drift, and recover rather than actively swimming against the water.
Once the initial spasm starts to release, move slowly and deliberately. Reintroduce gentle kicking only when you’re confident the muscle has settled. Rushing this phase is often what triggers a second cramp.
Above all, remember that cramp is temporary, even when it feels overwhelming in the moment. Managing it calmly, protecting your energy, and using your board effectively is what keeps a bad moment from turning into a serious problem.
Recovery Between Sessions
Cramp prevention doesn’t stop when you leave the water. In fact, what you do between sessions often determines how your next one feels, especially on bodyboard trips where multiple sessions a day quickly add up.
As mentioned previously, hydration is the first priority, but nutrition also plays a quiet and important role. Foods rich in magnesium and potassium can support muscle recovery and reduce the likelihood of fatigue building into cramp. Bananas, nuts, seeds, and coconut water are simple, accessible options that fit easily into a surf trip routine.
“Bananas are great and they are full of potassium but you also need magnesium so dark chocolate and nuts or high dose of Mg supplement does the trick for me.”
Sleep is often underestimated but critical. Muscles don’t fully recover in short rest windows between sessions, they recover overnight. Poor sleep compounds fatigue quickly, making cramps more likely as the trip goes on. On our Costa Rica and El Salvador trips, I always recommend guests take a power nap in the afternoon to improve recovery.
Gentle, conscious stretching, especially for the calves, hamstrings, and hips can ease residual tightness and keep muscles loose for the next session. Again, little and often works best, and I find follow-along YouTube videos particularly useful. Foam rolling helps too, especially for the lower legs where tension tends to build most.
“I like rolling a tennis ball in the arch of my foot for a nice fascia release. I bet getting a foam roller into the calves would really help with cramping too.”
On longer boogie trips abroad, it’s also worth booking a mid-week massage to help release accumulated tightness from the sudden increase in physical activity. I always look forward to a traditional mid week Moroccan massage on our Secret Morocco trips, you leave feeling lighter, looser, and completely reset for the next sessions.
More Waves, Fewer Cramping Sessions
That night in the Alps, cramp didn’t care how far I’d already run or that the finish line was still hours away, it simply arrived when fatigue, load, and timing all collided in the wrong way.
Bodyboarding isn’t so different.
Whether you’re halfway through a long paddle out, fighting a strong rip, or deep into your third session of a bodyboard trip, cramp always shows up at the same point: when preparation falls just slightly short of demand. And just like in that race, the difference between struggling through it or moving past it often comes down to how well you’ve managed everything before that moment, hydration, conditioning, recovery, and pacing.
Nobody books a surf trip hoping to sit on the beach rubbing out a locked calf. The goal is always the same: more waves, longer sessions, and better days in the water. Staying ahead of cramp is a big part of making that happen.
If you have your own secret remedies for cramps or additional points worth mentioning then be sure to head over to our Bodyboard Holidays Community WhatsApp Group, where the inspiration for and many of the quotes in this blog came from. It’s a great place to meet like minded people (remotely) while also using it as a place to answer all your bodyboarding related burning questions as well as a place to share your boogie stoke.
Alternatively, if you’d like to meet such cool folk in person while also progressing your bodyboarding, then you can also explore our upcoming trips to Costa Rica, El Salvador and Nicaragua.
The “AVOID CRAMP” Checklist
At Bodyboard Holidays, we swear by “AVOID CRAMP”, a simple acronym to help keep cramps from ruining your sessions and surf trips.
A — Arrive Hydrated
Start hydrating before the session, not during it. Drink consistently the night before, especially before long surf days or flights.
V — Value Your Recovery
Sleep, rest, stretching, a massage and downtime between sessions matter more than most riders realise.
O — Optimise Electrolytes
Water alone isn’t always enough. Sodium, potassium, and magnesium all help muscles contract and recover properly.
I — Increase Surf Time Gradually
Don’t go from one session a week at home to six-hour marathons on day one of a bodyboarding trip. Build volume progressively.
D — Don’t Ignore Tightness
Cramp rarely appears out of nowhere. Tight calves, curling toes, or twitching muscles are usually early warning signs.
C — Choose the Right Fins
Poorly fitted fins increase fatigue fast. Comfort, stiffness, and fit all affect cramp risk.
R — Relax in the Water
Overkicking and staying tense wastes energy. Efficient movement conserves your legs for longer sessions.
A — Activate Before Bodyboarding
Warm up before entering the water. Calf raises, ankle mobility, leg swings, and a light jog can make a huge difference.
M — Maintain Mobility
Flexible calves, hips, hamstrings, and feet handle repeated paddling loads far better than stiff, restricted muscles.
P — Pace Yourself
The best bodyboard trips aren’t won in the first session. Smart pacing means more quality waves across the whole trip, not just the first day.
