The best kit for HYROX sandbag lunges is a fitted short or race short that gives full coverage at the knee and thigh without gripping or riding up, paired with a top that stays put when a sandbag sits across your shoulders. As of 2026 you want fabric with 4-way stretch and a leg that does not creep during 100m of deep lunging.
- The sandbag lunge is 100m of walking lunges carrying a sandbag (Open men 20kg, women 10kg) across the shoulders or upper back.
- Every rep drives the knee to the floor, so shorts must cover and flex without riding up or restricting the stride.
- In THETA's coaching data, the two commonest kit complaints on lunges are ride-up chafe and a top slipping under the bag.
Why are lunges so hard on kit?
Here's what makes the sandbag lunge the most extreme range-of-motion station in HYROX: every rep takes your hip and knee through full flexion, the fabric across the thigh and seat stretches to its limit, and the bag presses down on your traps the whole time. Shorts that are too tight restrict the stride. Shorts that are too loose ride up and chafe the inner thigh, and a top with a loose neck or wide shoulders slides out from under the bag. It's the station that finds out whether your kit can both cover and move, or only manage one of the two.
What shorts should you wear for the lunges?
You're after a race-specific fit with genuine 4-way stretch, which is exactly what THETA's Tech Short v2 is built for. It uses a durable polyester and elastane blend with 4-way stretch designed for repeated high-output work including lunges, so the fabric follows the joint rather than fighting it. The leg wants to sit long enough to cover the mid-thigh without bunching, and a premium elasticated waistband keeps the short anchored so it doesn't slide as you drive up from each rep. Loose run shorts, which lose their shape the moment they're soaked, are the classic ride-up culprit.
What about a top under the sandbag?
Pick a top that stays flat on the shoulders and doesn't bunch where the bag sits. A precision-cut technical tee such as THETA's Tech T-Shirt Race Team v2 keeps a clean shoulder line, while a race singlet with reinforced shoulder seams gives the bag the least fabric to shift. Those reinforced shoulders earn their keep here, because the sandbag abrades the same spot rep after rep, and that's exactly where light race kit fails first. Steer clear of wide-necked or loose vests that slip the instant the bag loads one side.
| Requirement | Best choice | Why it matters |
|---|---|---|
| Knee coverage | Mid-thigh fitted short | Protects knee contact, no exposure |
| Stretch | 4-way stretch short (Tech Short v2) | Full lunge range without restriction |
| Anchoring | Elasticated race waistband | No slide when driving up |
| Shoulder | Reinforced-seam singlet or tee | Handles bag abrasion, stays put |
| Avoid | Loose run shorts, wide vest | Ride-up chafe, bag slippage |
"Lunges punish anything that isn't cut for the movement. The right short disappears through 100 metres, the wrong one has you tugging the hem every ten reps," says the THETA coaching team.
How do you dial in coverage without restriction?
The whole game is balance: enough fabric to protect, enough stretch to move, and no tug-of-war between the two.
- Pick a short that reaches mid-thigh so the knee stays covered at full depth.
- Test the fabric by doing ten deep lunges, checking for any pull across the seat or thigh.
- Confirm the waistband holds without a drawcord dig when you stand tall.
- Choose a top with reinforced shoulders so the bag does not chew the seam.
- Run a lunge set in the kit soaked with water to confirm no ride-up when wet.
Does women's fit change the advice?
The principles hold, but the women's race short is engineered by THETA's female athletes for freedom of movement with controlled structure, so it stays clean in silhouette under intensity rather than bunching like loose run shorts. At the women's sandbag load of 10kg the priority doesn't change: full lunge range, no ride-up and a waistband that holds. A squat-proof, structured fabric keeps coverage secure through the deepest part of every rep.
Common questions
What shorts are best for HYROX sandbag lunges?
Choose a mid-thigh fitted short with 4-way stretch and an elasticated waistband, such as THETA's Tech Short v2. It covers the knee at full depth, follows the joint without restriction and stays anchored so it does not ride up over 100m.
Should I wear long tights for the lunges instead?
Tights work if they have full 4-way stretch and do not restrict the stride, but many athletes prefer a fitted race short for cooling in a hot arena. The key is coverage and freedom of movement, not the length itself.
Why do my shorts ride up during lunges?
Ride-up usually comes from loose shorts that lose shape when soaked or a leg opening cut too wide for your thigh. A race-specific fit with structured fabric and a secure waistband keeps the leg in place through each rep.
What top stops the sandbag slipping?
A fitted top with reinforced shoulder seams, like a race singlet or the Tech T-Shirt Race Team v2, keeps a flat, stable surface under the bag. Wide-necked or loose vests shift when the bag loads one side and force constant readjustment.
Do the shoulders of my top really matter here?
Yes, the sandbag abrades the same spot on your shoulders rep after rep, and that is where light race tops fail first. THETA reinforces shoulder seams specifically for this kind of sled and rack abrasion, so the top lasts and stays put.
Is there a difference for women's kit on this station?
The women's race short is built by THETA's female athletes for controlled structure and freedom of movement, staying clean in silhouette under intensity. At the 10kg women's load the same rules apply: full range, no ride-up and a waistband that holds.
How do I test kit for the lunges before race day?
Do a set of deep lunges in the kit, ideally soaked with water, and check for pull across the seat, ride-up at the leg and any bag slippage. Only race in shorts and a top that pass this test under fatigue.
Sources
- HYROX official race format and station standards (hyrox.com)
- THETA coaching data, 2024–2026
- THETA 2026 Training and Race collection construction notes
Cover the range, keep the speed. THETA's Tech Short v2 and reinforced-shoulder race tops are built for the deepest part of every lunge. Explore THETA performance kit, tested across two full HYROX seasons.