Sandbag Lunges HYROX: technique to protect your back
Station 7. You have 6.8 km of running behind you, 7 stations completed. The judge hands you a 20 kg sandbag (Open men) or 10 kg (Open women). You have 100 m of lunges to do, with the back knee touching the ground on each rep, otherwise it's a no-rep. Here's how to get through this station without destroying your spine.
The precise format
| Category | Sandbag weight | Distance |
|---|---|---|
| Open Men | 20 kg | 100 m |
| Open Women | 10 kg | 100 m |
| Pro Men | 30 kg | 100 m |
| Pro Women | 20 kg | 100 m |
100 m corresponds to approximately 80-100 lunges depending on your stride length. Count generously, it's long.
Sandbag position — the detail that changes everything
You can carry the sandbag in 3 ways. Choose carefully.
Option 1 — On the shoulders / neck
Sandbag placed on the base of the neck and the upper trapezius, like a yoke. This is the most stable and most economical option.
Advantages: centered weight, hands free to stabilize.
Disadvantage: requires strong traps and neck for 100 m.
Option 2 — Front rack
Sandbag held in front of the chest, arms crossed. Possible but tiring for the arms and shoulders.
Advantages: good posture, forced straight back.
Disadvantages: you'll be shaking at 50 m, clenched hands.
Option 3 — Bear hug
Sandbag held against the stomach, arms crossed around it. The most tiring.
Avoid unless you have no choice (sandbag poorly held). Will exhaust your abs and make you lean forward.
→ Recommendation: shoulders / neck for 90% of athletes. More stable, more energy-efficient.
Lunge technique
The descent
Front foot lands, front knee aligned with the ankle (not past the toes). Back knee lowers towards the ground slowly. No free fall — you'll ruin your knee.
Ground contact
The back knee must touch the ground — this is the HYROX evaluation criterion. No long pause, just a clean touch. If you don't reach the ground, you're doing "floating lunges" and the judge will no-rep you.
The ascent
Push off with the front foot, hamstrings + glutes engaged. Transfer weight to the straight front leg, and then perform the next lunge with the other leg.
Fluidity
No pause between lunges. Constant, moderate pace. If you speed up at the beginning, you'll burn out at 60 m. Aim for a sustainable pace for 80-100 reps.
The 5 mistakes that cause injury or waste time
1. Back knee doesn't touch → no-rep
When fatigued, you'll bounce up too early. Focus: knee must touch the ground on every rep. Better to descend slowly and touch than to bounce quickly and get a no-rep.
2. Front knee goes past the toes
If your front knee goes beyond your toes, you put your knee under shear stress. Risk of injury. Solution: longer stride (front foot further forward).
3. Arched or rounded back under load
With a sandbag on your neck, your spine should remain neutral. Not excessively arched (exaggerated curve), not rounded (forward rotation). Engage your abdominal bracing as soon as you pick up the sandbag.
4. Lunge too short
Not enough range of motion → front knee goes past toes + difficult to lower and touch the ground. Increase your stride length.
5. Trying to sprint for 100 m
Fatal mistake. You'll burn out at 30 m. For the vast majority of athletes, maintain a conversational pace, lunge after lunge, without accelerating. This is a muscular endurance station, not a speed one.
Strategy for managing 100 m
For your first HYROX
- Regular pace over 100 m, no pause if possible
- If you need to pause: never put down the sandbag. Resume in the same lunge.
- Count in tens of meters to mentally break down the distance
To aim for sub 1 h 30
- Slightly faster pace, quick transition between lunges
- No pauses at all
- Immediate exit from the station, without stopping to breathe
How to program sandbag lunges
3 typical sessions to include in preparation:
Volume session (week 1-3)
- 4 × 50 m with 60 sec rest
- Light load (10-15 kg)
- Pure technical focus, not timing
Race-paced session (week 4-6)
- 3 × 100 m with 90 sec rest
- Race load (20 kg men / 10 kg women)
- Preceded by 400 m of running
Simulation session (week 7)
- 100 m sandbag lunges directly after 1 km run
- Race load
- Once a week, twice max
Preparing for sandbag lunges without a sandbag
If you don't have a sandbag:
- Weighted backpack (books, sand in zip bags) — 80% functional
- Kettlebells in goblet hold or farmer's carry — different but useful
- Light Olympic bar on shoulders (20-30 kg) — good approximation
To truly progress: buy an adjustable sandbag (€50-90). It's the most cost-effective equipment investment for HYROX after the rower. See HYROX Equipment Guide.
Anatomy: what works
| Muscle | Solicitation |
|---|---|
| Quadriceps | Very strong (descent + ascent) |
| Glutes | Strong (hip extension) |
| Hamstrings | Strong (descent control) |
| Calves | Moderate |
| Core (abdominal bracing) | Very strong (under load) |
| Lats | Moderate (carrying sandbag) |
This is one of the most comprehensive stations in terms of muscles worked. Well programmed, it also builds a better overall fitness level.
In summary
- Sandbag position: shoulders / neck for the majority
- Back knee to the ground on every rep — non-negotiable
- Front knee aligned with the ankle, never past the toes
- Regular pace over 100 m, no sprinting
- Programming: technique → race-paced volume → simulation
Station 7. This is where the legs give out. If you get through it with dignity, you'll finish HYROX with confidence.
HybridDept makes merch for those who pass station 7. Drops finishers, drops insiders, permanent collection. See the collection.