How to apply a tourniquet: the LEG rule and four steps for riders
Special Forces drilled this into me for a reason: an arterial bleed doesn't wait for an ambulance. On most group rides, half the riders carry a tourniquet. Almost none of them can put it on under stress.
When to use a tourniquet: the LEG rule
I teach it as LEG. Three conditions, and you want all three before the tourniquet goes on.
- L for limb. The wound is on an arm or a leg. A tourniquet can't go on the neck, armpit or groin. Those wounds get packed and pressed.
- E for extreme bleeding. Blood spurting, pooling on the ground, or soaking through clothing. The American College of Surgeons lists all three as signs of life-threatening bleeding.
- G for get control. Hard pressure on the wound isn't stopping it.
The sources differ on the order. The American College of Surgeons and the US Department of Homeland Security teach pressure first, then a tourniquet if an arm or leg keeps bleeding. ILCOR, the international body that reviews first aid evidence, suggests a tourniquet over pressure alone for life-threatening limb bleeding. They agree on one thing: if you don't have a tourniquet in your hand yet, press hard until you do.
How to apply a tourniquet in four steps
- 01High and tight, above the wound, never on a joint. The Department of Homeland Security puts it 5 to 8 cm (2 to 3 inches) above the wound, between the wound and the heart, and never over an elbow, knee, wrist or ankle. The C-A-T instructions and the TCCC guidelines keep high and tight, as high on the limb as it will go, for when you can't find or see the bleed. In riding gear, that happens.
- 02Pull the strap tight. In the reel I said strap until the bleed stops, not until it feels snug. The maker of the C-A-T tourniquet splits the job in two: pull the band tight enough that you can't slide three fingertips under it, then let the windlass stop the bleeding. Either way, snug is not enough.
- 03Twist the windlass until the bright red flow stops, then lock it in its clip. Miami-Dade Fire Rescue's protocol uses those words: twist until bright red bleeding has stopped. It will hurt. That's normal.
- 04Write the time. The C-A-T has a TIME strap for it, and Miami-Dade's EMS protocol also allows writing it on the rider's forehead. The hospital needs that clock, because a tourniquet left on too long damages the limb.
Why a loose belt over jeans makes it worse
A tourniquet that's only half tight squeezes the veins that carry blood back to the heart, but not the artery feeding the wound. A 2007 review in the Emergency Medicine Journal says this increases bleeding. Over jeans you can't see what's happening under it. That's what I mean when I say a loose belt hides the bleed. It doesn't stop it.
A belt can work in the right hands. A 2021 cadaver study in the Journal of Trauma and Acute Care Surgery found a leather belt did stop bleeding, but only while someone kept continuous pressure on it. ILCOR suggests a manufactured tourniquet over an improvised one. Carry the real thing.
Practise before the ride, not during it
Carrying one is the easy part. In a 2015 study, only 20.4 per cent of untrained adults put a tourniquet on correctly, and 44.1 per cent with an instruction card in hand. A 2020 study found that six months after a bleeding control course, scores had dropped from 100 to 69 per cent. None of them had a crashed friend in front of them.
So here's the drill. Next breakfast ride, every rider practises on a thigh before coffee. Placement, strap, windlass, lock, time.
A practice tourniquet comes off as soon as you've checked it. North American Rescue warns that use beyond two hours may cause permanent nerve or muscle damage. Pain isn't a reliable sign it's tight enough, according to a 2018 study. Learn how tight is tight on a hands-on course, with an instructor watching your hands.
Questions riders ask
Where do you put a tourniquet on a leg?
5 to 8 cm (2 to 3 inches) above the wound, between the wound and the heart, and never over the knee or ankle. If you can't see where the blood is coming from, go as high on the thigh as it will go.
How tight should a tourniquet be?
Pull the strap tight enough that three fingertips can't slide under it, then twist the windlass until the bleeding stops. Don't judge it by pain: a 2018 study found pain isn't a reliable sign the artery is closed.
Can I use a belt as a tourniquet?
Only as a last resort. A loose one can make bleeding worse, and a 2021 cadaver study found a leather belt only held while someone kept pressure on it. ILCOR suggests a manufactured tourniquet.
Why write the time on a tourniquet?
A tourniquet left on too long damages the limb, so the hospital needs to know when it went on. Use the tourniquet's time strap, or write it on the rider's forehead.
What the reel says
Special Forces drilled this into me for a reason. Arterial bleed doesn't wait for an ambulance. On most group rides, half the riders carry a tourniquet. Almost none can apply it under stress. Use it for LEG. When a limb is injured. When there is extreme bleeding: spurting, pooling or soaking clothing. To get control of the bleeding, when applying pressure fails to stop it. And follow these steps. One. High and tight. Above the wound. Never on a joint. Two. Strap until the bleed stops, not until it feels snug. Three. Twist the windlass till bright red flow stops. Lock it. Four. Write the time on the strap or the forehead. Hospital needs that clock. Wrong: a loose belt over jeans. That hides the bleed. It doesn't stop it. Next breakfast ride, every rider practises on a thigh before coffee.
Sources
- Col. Shekhar Attri, SM (Retd.), reel on @adv_pathfinder, 2026: the LEG rule, the four steps, the loose belt and the breakfast-ride drill. Link
- American College of Surgeons, "Learn How to Save a Life with 3 Steps During National Stop the Bleed Month", 1 May 2024: pressure, pack, then a tourniquet on an arm or leg that is still bleeding. Link
- American College of Surgeons, Pons and Jacobs, "Save a Life: What Everyone Should Know to Stop Bleeding After an Injury", 2016: the signs of life-threatening bleeding, including spurting, pooling and soaked clothing. Copy hosted by Region F Coalition. Link
- U.S. Department of Homeland Security, "Applying a Tourniquet", 6 August 2018: direct pressure first, 2 to 3 inches from the wound between wound and heart, never over a joint, windlass, note the time. Link
- USUHS National Center for Disaster Medicine and Public Health, "Stop the Bleed: Tourniquet Application Instructions", undated, read 28 September 2026: signs of life-threatening bleeding, twist until bleeding stops, pain is normal. Link
- International Liaison Committee on Resuscitation, First Aid Task Force, "Control of severe, life-threatening external bleeding in the out-of-hospital setting: Tourniquets", CoSTR, 20 December 2019: tourniquet over direct pressure alone; manufactured over improvised. Link
- North American Rescue, "C-A-T Gen 7 Instructions for Use", INST-001 REV08, August 2025: band tight enough that three fingertips can't slide under, windlass until bleeding stops, lock in the clip, time strap, high on the limb when the bleed can't be found, use beyond 2 hours may cause permanent nerve or muscle damage. Link
- Committee on Tactical Combat Casualty Care, NAEMT, "TCCC Guidelines", 1 May 2026: high and tight only when the bleeding site isn't apparent, otherwise 2 to 3 inches above it; mark the time on the tourniquet. Link
- Miami-Dade Fire Rescue, "Procedure 48: Tourniquet Application", revised 25 July 2019: twist until bright red bleeding has stopped; time on the tourniquet or the patient's forehead; wrong application can increase blood loss. Link
- Lee C, Porter KM, Hodgetts TJ, "Tourniquet use in the civilian prehospital setting", Emergency Medicine Journal, August 2007: a tourniquet that blocks venous but not arterial flow increases bleeding. Link
- Cremonini C and others, "Evaluation of the efficacy of commercial and noncommercial tourniquets for extremity hemorrhage control in a perfused cadaver model", Journal of Trauma and Acute Care Surgery, 2021: a leather belt stopped bleeding only with continuous pressure. Link
- Goolsby C and others, "Just-in-Time to Save Lives: A Pilot Study of Layperson Tourniquet Application", Academic Emergency Medicine, 2015: 20.4 per cent correct application untrained, 44.1 per cent with an instruction card. Link
- Weinman SA, "Retention of Tourniquet Application Skills Following Participation in a Bleeding Control Course", Journal of Emergency Nursing, 2020: checklist scores fell from 100 to 69 per cent at six months. Link
- Alterie J and others, "Does Pain Have a Role When It Comes to Tourniquet Training?", Journal of Special Operations Medicine, 2018: pain is not a reliable sign of arterial occlusion. Link
Col. Shekhar Attri, SM (Retd.)
@adv_pathfinderFounder and expedition commander of ADV Pathfinder. 20+ years in the Indian Army's Para Special Forces, Sena Medal. About the founder
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