Whether you need crutches depends on how much weight you can put on your injured leg. The simplest test: try to take four steps. If you can walk four steps bearing your own weight, even with pain, you likely don’t need crutches right away. If you can’t complete those four steps, or if a doctor has told you to stay off your foot, crutches or another mobility aid are necessary to protect the injury and let it heal.
The Four-Step Test
Emergency doctors use a quick screening method called the Ottawa Ankle Rules to decide whether an ankle or foot injury needs an X-ray. One of the key criteria is whether you can bear weight for at least four steps, both right after the injury and when you’re being evaluated. In a study of 200 patients with ankle trauma, 47% couldn’t manage those four steps. Of that group, about one in three turned out to have a fracture.
This doesn’t mean passing the four-step test guarantees nothing is broken. But failing it is a strong signal that something more serious may be going on, and you should keep weight off the leg until you’ve been evaluated. If you can hobble four steps but it’s extremely painful, crutches can still help by reducing the load on your injury while you recover.
Injuries That Typically Require Crutches
Some injuries come with strict non-weight-bearing orders, meaning you should put zero weight through the affected leg. Others allow partial weight bearing, where crutches help you limit how much force goes through the healing bone or tissue. Here’s what to expect for common injuries:
Stress fractures of the foot and ankle typically take 6 to 8 weeks to heal. The American Academy of Orthopaedic Surgeons recommends avoiding activities that put weight on your foot during recovery. Fractures in certain bones with poor blood supply, like the navicular or the base of the fifth metatarsal, often require a cast and strict non-weight-bearing for at least 6 weeks. Return to sports after these injuries can take 12 weeks or more.
Moderate ankle sprains (grade 2, involving partial tearing of ligaments) generally need crutches for the first few days to two weeks. Massachusetts General Hospital’s protocol recommends weight bearing as tolerated with crutches during the first one to three days, then gradually increasing weight over the next two weeks. By two to six weeks, most people are walking normally without assistance. The total recovery window is roughly two to three weeks for the initial healing phase.
Meniscus tears in the knee often require crutches, especially after surgical repair. If you had a meniscus repair rather than a partial removal, expect a longer stretch on crutches. Even without surgery, you should avoid putting full weight on the leg if it causes pain.
ACL reconstruction is one of the longer crutch commitments. Current protocols call for touchdown weight bearing only (just the lightest contact with the floor) for the first six weeks after surgery. From weeks 6 to 12, you gradually wean off crutches and work toward a normal walking pattern.
What “Partial Weight Bearing” Actually Means
If your doctor says “partial weight bearing,” you might wonder how much weight that is. The honest answer: even medical professionals interpret it differently. Research in BMJ Open Sport and Exercise Medicine found that surgeons and rehab specialists defined partial weight bearing anywhere from 1% to 100% of body weight, a staggeringly wide range. The most commonly cited definition is 30% to 50% of your total body weight, or roughly 20 to 25 kilograms of force through the foot.
“Toe touch weight bearing” is lighter still, generally meaning about 20% of your body weight, or 10 to 15 kilograms. Think of it as resting your toes on the ground for balance without actually pushing off. If you’ve been given either of these instructions, crutches are essential because you physically cannot limit your weight that precisely without them.
Crutches vs. Knee Scooters
If you’re facing weeks of non-weight-bearing recovery, you have options beyond traditional underarm crutches. Knee scooters (also called rolling knee walkers) let you rest your shin on a padded platform and roll yourself around. A study comparing the two after foot and ankle surgery found that both are safe and effective. Patients using crutches reported 22 total falls compared to 14 falls among knee scooter users, though the difference wasn’t statistically significant. The bigger gap was in satisfaction: patients strongly preferred knee scooters and said they’d choose them again in the future.
Crutches are better for stairs, tight spaces, and uneven ground. Knee scooters work well on flat surfaces and for longer distances but are useless on stairways. Many people end up using both, keeping crutches by the stairs and a scooter for everything else. Regardless of which you choose, any period of non-weight-bearing increases your risk of muscle loss in the affected leg, reduced stability, and decreased blood flow that can raise clot risk. Staying active within your restrictions matters.
How to Fit Crutches Correctly
Poorly fitted crutches create new problems. The most important measurement: leave a gap of two to three finger widths (about 5 centimeters) between the top of the crutch pad and your armpit. The pad should never press into your armpit. Your weight should be carried through your hands and arms, not jammed up under your shoulders.
To check the fit, stand with the crutch tip about 5 centimeters out from the side of your shoe and about 15 centimeters in front of your toe. Your elbow should have a slight bend when gripping the handhold. If the crutches are too tall and you end up leaning on the armpit pads, you risk compressing the nerve that controls your shoulder muscles. This condition causes numbness on the outer shoulder, pain, and weakness when lifting your arm away from your body. It’s entirely preventable by keeping pressure off the armpit area.
How to Use Crutches on Stairs
Stairs are the most common place people struggle with crutches. The rule is simple: “up with the good, down with the bad.”
- Going up: Step up with your uninjured foot first. Get your balance, straighten that knee to lift your body, then bring the crutches and your injured leg up to meet it.
- Going down: Lower your crutches and injured leg to the next step first. Then slowly bring your uninjured leg down to join them.
If there’s a handrail, hold both crutches under one arm and use the rail with your free hand. Go slowly. If stairs feel unsafe, there’s no shame in sitting down and scooting yourself up or down on your backside, especially in the first few days when you’re still getting used to the crutches.