Cargo nets look easy from the sideline. A big rope ladder, right? You grab it, climb it, come down the other side. What’s the problem?
The problem is the flex. The problem is the angle. The problem is that you’ve already run five miles and done a bucket carry and a barbed wire crawl, and now you’ve got a slanted, swaying net with gaps wide enough to swallow a forearm — and everyone behind you is right on your heels.
The cargo net is one of the most consistently underestimated obstacles in OCR. Athletes who nail their grip training and run strong intervals still lose time — and occasionally fall — because they never practiced the one skill the net actually tests: coordinated, energy-efficient movement on an unstable surface. This guide fixes that.
Why Cargo Nets Are Different From Everything Else on Course
Most OCR obstacles challenge you in isolation — grip strength, balance, or raw power. Cargo nets challenge all three simultaneously, and they add a fourth variable: dynamic instability. Every time another athlete steps onto the net, the whole structure shifts. Your handholds and footholds change position mid-move. Your brain has to recalculate constantly.
That’s what separates cargo net climbing from rope climbing, wall scaling, or even traverse walls. On a traverse wall, the holds are fixed. On a rope, the movement pattern is vertical and relatively predictable. On a cargo net — especially the angled A-frame designs used by Spartan, BattleFrog-era courses, and most independent events — you’re dealing with a surface that behaves differently every single time someone else moves on it.
Factor in wet conditions (virtually guaranteed in most OCR formats) and rope-soaked weight gain, and you’ve got an obstacle that rewards athletes who’ve thought about technique over athletes who just trained harder.
The Mechanics: How to Actually Move on a Cargo Net
Here’s the core principle: use your legs more than you think you should.
Most first-timers grab the net and pull — arms doing the work, feet dragging behind. That’s the fast track to arm fatigue and poor footing. Strong climbers use their legs as the primary engine, with hands providing control and stability rather than power. Think of it less like a pull-up ladder and more like a staircase you happen to be gripping.
The technique breakdown:
- Foot placement first. Before you reach up, find a solid foothold. Weight the foot fully. Only move your hands once your feet are stable.
- Three points of contact. At any given moment, three limbs should be engaged — two feet and one hand, or two hands and one foot. Never release two points at once.
- Move diagonally. On inclined A-frame nets, moving straight up is mechanically awkward. A slight diagonal path that follows the rope geometry is more efficient and keeps your center of gravity closer to the net.
- Grip the rope intersections. Where ropes cross, the surface is stiffer and less likely to shift under load. Grabbing the X-junction rather than the mid-span of a rope segment gives you more reliable purchase.
- Keep your hips close to the net. The further your body extends away from the surface, the more you’re cantilevering your weight and loading your arms. Stay compact. Think of hugging the net rather than pushing away from it.
The Descent: The Part Most Athletes Rush
Coming down is where most cargo net injuries happen. Athletes have cleared the apex, their adrenaline is high, and they start moving fast — which is exactly when a foot slips through a gap or a knee catches a rope at the wrong angle.
The descent rules are the same as the ascent: feet first, three points of contact, deliberate movement. The temptation to just drop or scramble is real, especially late in a race when your proprioception is starting to blur. Resist it. A twisted ankle on the dismount can cost you more time than a slow, controlled descent ever would.
On vertical-drop nets — the kind that hang flat rather than incline — the descent is actually more technically demanding than the climb. Your weight is directly over the net rather than distributed across an incline, and the surface tends to swing more aggressively. Face the net on the way down, lean your chest into it, and step down with deliberate foot placements rather than swinging free.
Training for the Net When You Don’t Have a Net
Access to actual cargo net climbing is limited for most athletes unless they’re training at a dedicated OCR gym. The good news is that the physical demands of cargo net climbing transfer well to other training modalities.
Coordination and instability: Rope ladder training, if you can access one, is the closest analogue. Climbing wall training on slab-style routes also builds the kind of precise footwork and hip positioning that cargo nets demand. Slacklining builds the instinctive micro-balance corrections you’ll need when the net sways.
Leg-drive and hip hinge: Box step-ups and step-down drills (particularly slow, single-leg step-downs) build the deliberate foot-placement strength and neuromuscular control that makes cargo net footwork reliable under fatigue. Farmers carries and loaded lunges build the functional leg endurance that keeps your climbing engine running late in a race.
Grip endurance (not strength): Cargo nets don’t require exceptional grip strength — the ropes are thick enough that most athletes can hold them easily. What kills people is grip endurance. Dead hangs, towel pull-ups, and ring rows all build the kind of sustained forearm engagement you need to move efficiently through a net without losing control of your hands.
One honest caveat: none of these substitutes fully replicates the dynamic instability of a loaded cargo net with other athletes on it. If you have access to any event-style training venue, a Spartan Stadium course, or even a well-equipped playground, practice on the actual structure when you can.
Race Strategy: Pacing the Net Across a Long Course
In a sprint-format race, you can afford to push the net hard. In a beast or super, it’s a different calculation. Cargo nets typically appear multiple times on longer courses, and burning your arms on the first one sets up a slow, grinding struggle on the second and third.
Treat cargo net climbs like hill repeats in your pacing model: don’t max out, maintain form, recover immediately on the other side. Take thirty seconds at the base to breathe before committing to the climb if you’re gassed from the previous obstacle. The net penalizes rushed, sloppy movement far more than it rewards speed.
Also: look at the net before you commit. Check where other athletes are, where the wear points are in the rope, and whether the structure is inclined, vertical, or A-frame. A two-second read before you grab is worth far more than two seconds of sprint at the base.
The Skeptic’s Case: Is Net Technique Really Worth This Much Attention?
Fair question. For most recreational OCR athletes, cargo nets aren’t a major time sink — they’re an obstacle you move through and forget. If you’re finishing in the 2–3 hour range on a super and cargo nets cost you an extra thirty seconds, that’s not a competitive concern.
Where technique genuinely matters: elite and competitive wave athletes where seconds compound across multiple laps; athletes racing in wet or cold conditions where grip and footing degrade quickly; and anyone who’s had a net-related fall or injury and wants to understand why.
It also matters for confidence. The net is a psychologically amplified obstacle — it looks more dangerous than it is, it draws spectators, and failing it feels public. Knowing your technique cold means you hit that obstacle with a different mindset. That mental margin is real, even if the time gains are modest.
Bottom Line
Cargo nets reward smart, economical movement — not raw strength or speed. Feet first, three points of contact, intersections over mid-spans, hips close, and slow down on the descent. Practice the physical components — grip endurance, footwork precision, instability tolerance — when you can’t access the actual obstacle. And when race day comes, read the net before you grab it.
Every obstacle on course has a language. The cargo net’s language is patience and coordination. Learn it and you’ll move through it like it isn’t there.