Bruised Legs After Exercising? Here's What Your Body's Trying to Tell You
Updated on July 31, 2025
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Bruising on your legs is usually caused by blunt force to a muscle, like getting hit by an object or falling. But it can also be due to weakness in the blood vessels caused by age, a medication you’re taking, or an underlying medical condition. Intense exercise can also bring about bruising in your legs.
If you’re experiencing post-workout bruising consistently without an obvious cause, talk to your doctor. Seek immediate medical attention if the bruises are severe and accompanied by rapid swelling in your leg.
First, What Are Bruises and How Do They Happen?
Bruising is the result of blood vessels breaking, which leads to blood leaking out into tissues, usually causing a telltale rainbow of discoloration.
Most bruises are subcutaneous bruises, which occur just under the skin. But bruises can also occur in the muscles or bones. Bone bruises are the most painful and severe. In most cases, mild bruises disappear within days to weeks, but severe bruises can take months to totally heal.
Why You Have Exercise-Induced Bruising in Your Legs
Intense exercise that puts a lot of stress on the legs can lead to bruising. Here's what those bruises might be trying to tell you.
You Worked Out for a Long Time
Long, intense workouts that cause muscle fatigue — like running a marathon — can lead to tearing of muscle fibers and broken blood vessels, causing bruising.
You Hit Your Leg on Something During Your Workout
It's possible you accidentally banged your leg on a barbell or walked into the side of the treadmill, leading to a bruise on your leg, even if you don't remember getting any injuries while exercising. And if your workout involves repetitive pressure on your legs, like sliding a barbell along your shins during a deadlift, you could develop a bruise over time.
You're Getting Older
Your blood vessels and skin thin as you age. That means you might bruise more easily when your muscles are under increased pressure during exercise.
You're Taking Certain Medications
Blood-thinning medications, such as aspirin, warfarin (Coumadin, Jantoven), clopidogrel (Plavix), and others make it easier for your skin to bruise and may contribute to bruising after exercising.
You Have an Underlying Health Condition
Vitamin C or K deficiencies can also contribute to bruising after your fitness routine. In rare cases, an underlying medical condition, such as cancer, certain bleeding disorders, or Ehlers-Danlos Syndrome (a connective tissue disorder) could be the culprit.
Reducing Workout Bruising
Most bruises will go away on their own without treatment. If your gym-related bruising is more severe, resting your legs and elevating them above your heart can prevent swelling and relieve pain, as can applying ice in the 24 to 48 hours after injury. Apply a towel-wrapped ice pack to the area for no more than 15 minutes at a time, and repeat throughout the day.
Wrapping a swollen bruise with an elastic bandage can help speed up the healing process, and over-the-counter pain medications may help soothe your discomfort. Generally, though, if you get bruises on your legs from working out now and again, you don't need to worry.
To prevent bruises, try not to overdo it on your workouts and do your best to avoid hitting your legs on any gym equipment while exercising. Properly warming up and cooling down before and after a workout might help too.
When to See a Doctor
Bruising that occurs as a result of light exercise and no obvious trauma is worth talking to your doctor about.
Discuss any medications and supplements you're taking to ensure they're not contributing to the bruising, as well as any other symptoms you're experiencing to try to uncover any underlying medical conditions.
Seek immediate medical attention if you have excessive or rapid swelling in your legs along with the bruising. You may need a medical intervention to drain the excess fluid from your leg.
EDITORIAL SOURCES
Everyday Health follows strict sourcing guidelines to ensure the accuracy of its content, outlined in our editorial policy. We use only trustworthy sources, including peer-reviewed studies, board-certified medical experts, patients with lived experience, and information from top institutions.
Resources
- Muscle Contusion. Cleveland Clinic. May 23, 2023.
- Mayo Clinic Staff. Easy Bruising: Why Does It Happen? Mayo Clinic. May 30, 2025.
- Why Do You Bruise After Working Out? Exercise-Related Bruising Causes and Prevention. Community Strength Austin. August 29, 2024.
- Contusions: Overview, Types, and Treatment. TrustCare. March 15, 2021.
- Bone Bruise (Bone Contusion). Cleveland Clinic. February 13, 2024.
- Witstein JR et al. Muscle Strains in the Thigh. OrthoInfo. June 2024.
- Bruises (Ecchymosis). Cleveland Clinic. January 26, 2023.
- Ehlers-Danlos Syndrome. Cleveland Clinic. June 16, 2023.
- Mayo Clinic Staff. Bruise: First Aid. Mayo Clinic. April 17, 2024.
- Witstein JR et al. Muscle Contusion (Bruise). OrthoInfo. December 2024.
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