Have you ever finished an intense workout, only to find bruises on your body that you never expected? Minor bruising after strenuous physical activity is normal but it may also be a sign of underlying health conditions that should not be ignored.

This condition of bruising happens because the blood vessels are damaged under the skin, and that is why it causes bruising and pain. Although this may not cause any concern on one or two occasions, recurrent or unidentified bruises may be the warning sign that your body sends to you to alert you of something being wrong.

In this article, we will discuss why bruising occurs, medical conditions that could be causing it, and when to see a doctor.

How Do Bruises Form on Your Body?

Bruises are formed when small blood vessels break and leak blood under the skin, which causes a red, purple or black-and-blue mark. Most bruises are subcutaneous, meaning they occur just beneath the skin, but some can occur within muscles or bones, according to the American Academy of Orthopaedic Surgeons.

The severity of a bruise depends on the force of impact and the condition of the blood vessels. Mild bruises may fade in a few days, but more severe bruises can take weeks to heal.

Common Causes of Exercise-Related Bruising

1. Prolonged or Intense Exercise

If your workout involves prolonged strain—such as long-distance running, high-intensity weightlifting, or endurance training—your muscles and blood vessels can become weakened, making bruising more likely.

2. Accidental Impact

Many get bumped into gym equipment, weight racks or even barbells while exercising. The constant pressing weight from doing exercises like deadlifts or squats may even cause bruises at times, normally around the legs and arms.

3. Aging and Skin Thinning

As we age, our skin and blood vessels naturally become thinner and more fragile. According to the Mayo Clinic, aging reduces collagen production, making bruising more common especially in individuals over 50.

4. Medications That Affect Blood Clotting

Some medications can cause your skin to bruise easily, such as blood thinners like aspirin, anticoagulants and even some over-the-counter pain relievers. If you notice frequent bruising, consult your doctor about possible medication side effects.

5. Underlying Health Conditions

Persistent bruising could be a sign of an underlying medical condition. Vitamin deficiencies, blood disorders and even kidney or liver diseases can affect the body's ability to heal and clot properly.

5 Medical Conditions That May Be Causing Your Workout Bruises

1. Vitamin C Deficiency (Scurvy)

Vitamin C plays a crucial role in collagen production, which helps strengthen blood vessels. A deficiency can lead to weakened capillaries, causing frequent bruising, slow wound healing and fatigue.

2. Hemophilia

Hemophilia is a genetic disorder that impairs blood clotting, leading to excessive bleeding and easy bruising even with minor impacts. If you have a family history of hemophilia and experience frequent bruising, it’s best to seek medical advice.

3. Leukemia

Leukemia, a type of blood cancer, can cause unexplained bruising due to a low platelet count. If bruising is accompanied by fatigue, fever or unexplained weight loss, consult a doctor immediately.

4. Vitamin K Deficiency

Vitamin K is a vital nutrient for the proper clotting of blood. A deficiency leads to easy bruising and excessive bleeding. Low levels of vitamin K can occur in patients with liver disease, malabsorption disorders or those on certain medications.

5. Kidney or Liver Disease

Both kidney and liver diseases can affect blood clotting mechanisms, increasing the risk of bruising. Chronic conditions such as cirrhosis or renal failure may interfere with clotting factor production, making bruising more common.

How to Reduce and Prevent Bruising after Exercise

If you’re experiencing frequent bruising from workouts, consider the following strategies to prevent and minimize it:

1. Warm Up and Cool Down

Warming up before exercise increases blood circulation, gradually preparing muscles and blood vessels for physical exertion. Cooling down after a workout helps prevent sudden changes in blood flow, reducing the risk of bruising.

2. Maintain a Balanced Diet

Maintaining a diet rich in essential vitamins and minerals, especially vitamin C, vitamin K and iron, keeps your blood vessels healthy and resilient. Leafy greens, citrus fruits and lean proteins are some of the best choices for promoting vascular health.

3. Hydrate

Dehydration is said to cause muscle fatigue and cramping, and this leads to chances of injury and bruising. Ensure you drink enough water before, during and after working out.

4. Use appropriate workout gear

Using protective clothing such as compression leggings or padded gloves, can absorb impact and reduce the likelihood of bruising. If your workout involves heavy lifting, consider adding knee sleeves or shin guards to your protection.

5. Train with a Trainer

A certified personal trainer can help assess your form and technique to ensure that you're not putting unnecessary strain on your body. Poor posture and incorrect lifting techniques can contribute to excessive pressure on muscles and blood vessels, increasing the risk of bruising.

When to Seek Medical Attention

While occasional bruising is normal, you should see a doctor if you experience:

• Large or unexplained bruises that appear frequently
• Bruising that doesn’t heal within two weeks
• Bruises accompanied by excessive bleeding, nosebleeds or gum bleeding
• Fatigue, dizziness, or other unusual symptoms alongside bruising

Spending a dedicated time exercising, whether it is an hour or half, could be difficult for some people. If you live alone, or are a homemaker, most of the time goes by taking care of household chores, commuting to and from work, grocery runs and general day to day errands. This leads many people to worry that that they may not be able to lead a healthy lifestyle, but a new study shows that even small movements can prove to be a great addition to your daily life. The study was published in the European Journal of Applied Physiology, and revealed small movements being a great aid to bigger health issues.

Researchers found that people who weren't in the habit of working out saw improvements in their fitness after doing a specific type of exercise for about a month. These improvements included stronger muscles, more stamina to keep going, and better flexibility. This means you don't need to spend hours at the gym to start feeling healthier; even short bursts of activity can make a real difference.

Can Small Movements Make A Big Difference?

The type of exercise the study focused on is called ‘eccentric exercise’- movement emphasizes the part of an exercise where your muscles are lengthening. Think about slowly lowering any weighted object after you lift it and gently going down into a squat. Research has shown that this type of exercise is easier on your body compared to other types of workouts, and it's very effective at helping your muscles grow stronger and bigger. It's a smart way to build muscle without putting too much strain on your body, making it a good option for people who are just starting to exercise.

Even a small amount of this type of movement done regularly can provide noticeable benefits for your fitness. This is encouraging news for people who might feel like they don't have much time or energy to dedicate to exercise. It shows that even short, simple routines can have a real impact on your strength, endurance, and flexibility, making it easier to do everyday activities.

The participants, mostly women, went through a short period to get used to the study before starting a four-week routine of eccentric exercises. Every day, they performed ten repetitions of four easy exercises- chair squats (standing up and sitting down using a chair), chair reclines (leaning back slightly while seated), wall push-ups, and heel drops (raising up onto their toes and slowly lowering their heels).

After the four weeks of daily eccentric exercises, the researchers found some interesting results. While there weren't big changes in things like body composition, resting heart rate, or blood pressure, the participants did show significant improvements in their ability to do sit-ups and push-ups. They also performed better on the three-minute step test, which measures cardiovascular endurance. Additionally, their flexibility improved, and they reported feeling better mentally. This suggests that even a small amount of daily exercise can lead to noticeable and lasting fitness benefits for people who are not regularly active.

Exercises You Can Perform At Home

Chair squats: standing up and sitting down using a chair

Chair reclines: leaning back slightly while seated

Wall push-ups: placing your palms on the wall and pushing against it

Heel drops: raising up onto their toes and slowly lowering their heels

Tips To Help You Get Started With Eccentric Training

If you're interested in trying eccentric training, remember that you don't have to stick to the exact exercises used in the study. Almost any exercise can include an eccentric component. If you're not very active right now, you'll likely still see progress even if you start with low intensity and very short exercise sessions. Experts suggest starting with just five minutes a day and aiming for around ten repetitions of each exercise. This can be a good starting point to see what's possible, and from there, you can gradually increase the intensity or how long you exercise to keep improving your fitness.

One of the biggest indicators of a good workout for people is how much they sweat. The more you sweat, better the workout. Many people love heated workouts, like hot yoga or spin, even when it’s warm outside. Studios make the rooms very hot, sometimes over 100 degrees. they also believe it is a good way of remaining fit and a great evidence of their hard work. While a lot of people believe this, you still must see how it benefits you and whether are any other safety concerns or health risks you may be putting yourself into by doing this.

The Cleveland Clinic explains that working out in the heat can make your blood flow faster and warm up your muscles. This might make you more flexible. You might also burn a few more calories than in a normal workout. Some people feel good after a hot workout, like they do after a sauna. But, just being hot doesn’t mean you’ll get super fit. You still need to work hard and do the exercises correctly. Don't think that only the heat will make you fit.

Are There Any Risks Of Doing Heated Workouts?

Working out when it’s too hot can make it harder to exercise. According to WebMD your body has to work harder to stay cool, so you might not be able to do as much. This can mean you don’t get as much benefit from the workout. Normal workouts in a comfortable room can be just as good, and maybe even better for you. Heated workouts aren’t a magic way to get fit. They can also put a lot of extra stress on your body, so be careful.

When it’s very hot, you can get dehydrated easily. This can lead to problems like heat exhaustion or fainting. Drink a lot of water before, during, and after class. Watch out for signs that you’re getting too hot, like feeling dizzy or sick. If you have any chest, joint, or muscle pain, stop right away. It's important to listen to your body and make sure you are not pushing yourself too hard.

Who Should Avoid Heated Workouts

Some people should not do heated workouts. Older people, pregnant women, and people with heart problems should be careful. These workouts can be dangerous for them. If you have health problems like high blood pressure or asthma, talk to your doctor first. Just because a workout is popular, doesn’t mean it’s safe for you. It's better to be safe than sorry, so ask your doctor.

Exercise is the key to good health, but as with anything—even water or vitamins—too much of a good thing can be dangerous. For 41-year-old Gemma Underwood, a Scottish fitness enthusiast and orange belt in karate, her passion for training nearly cost her life. What started as an “intense” martial arts session led her down a frightening path to the emergency room, where she was diagnosed with a rare and potentially deadly condition called rhabdomyolysis. Her story is a sobering reminder for gym-goers and athletes everywhere: fitness without balance can be fatal.

It was just another training day in March for Underwood in South Ayrshire, Scotland. Her karate session had been grueling, pushing her physical boundaries, but she felt satisfied—until the next morning. Unable to get out of bed due to severe muscle pain and swelling, she noticed her arms had ballooned, and her muscles were extremely tight. But the most alarming sign was what she saw in the bathroom mirror: her urine had turned a disturbing dark brown, which she described as resembling “Coca-Cola.”

Panicked and confused, Underwood rushed to the emergency room. Medical professionals quickly diagnosed her with rhabdomyolysis, often referred to as “rhabdo,” a serious condition involving the breakdown of muscle tissue that releases toxic proteins—specifically myoglobin—into the bloodstream. If untreated, these proteins can clog the kidneys, leading to kidney failure or even death.

What is Rhabdomyolysis?

Rhabdomyolysis is not commonly discussed in mainstream fitness conversations, but it’s a well-known risk among medical professionals and elite trainers. According to the Cleveland Clinic, rhabdo occurs when skeletal muscle breaks down rapidly due to extreme physical exertion, trauma, or dehydration. As muscle fibers die, they release their contents into the bloodstream, overwhelming the kidneys and potentially causing multi-organ failure.

Symptoms vary and can be deceptively mild in early stages. They typically include:

• Muscle pain, swelling, or tenderness
• Weakness or difficulty moving limbs
• Fatigue or malaise
• Nausea or vomiting
• Significantly reduced urination or dark-colored urine (a major red flag)

In Underwood’s case, the condition escalated quickly—an all-too-common reality when the signs are misunderstood or ignored. Doctors told her the cause was likely inadequate hydration during her intense workout. “I wasn’t hydrated enough,” she admitted. “I should have been drinking more water before.”

Water plays a vital role in preventing rhabdomyolysis. Without enough fluids, the kidneys struggle to flush out myoglobin and other harmful muscle breakdown products. During strenuous exercise, particularly in high-heat environments or lengthy sessions, fluid loss through sweat increases dramatically. If not replenished, the body enters a state of dehydration, magnifying the impact of muscle strain.

Despite being fit and experienced, Underwood made the critical mistake of underestimating her hydration needs—a mistake that nearly proved fatal.

Underwood spent five days in the hospital receiving intravenous fluids and was fitted with a catheter to monitor kidney function. She’s now on a mandatory exercise hiatus for at least three weeks and has made hydration a top priority.

“I’m currently resting, no exercise at all, and drinking plenty of fluids,” she shared. “It was terrifying knowing I could’ve died from something that seemed so routine. Make sure you're hydrated before any workout, no matter how intense it is.”

Her message is clear: no one is immune to the dangers of overtraining. Her story is a cautionary tale not just for elite athletes but for anyone who steps into a gym or takes on a new fitness challenge without adequate preparation.

How to Exercise Smart and Stay Safe?

While rhabdomyolysis is rare, it’s becoming increasingly common among high-intensity workout communities, especially in CrossFit, spin classes, and boot camps where participants are encouraged to push limits. The good news? It’s entirely preventable.

Here’s what every exerciser should remember:

Hydration is non-negotiable: Drink water before, during, and after workouts. Electrolytes help too.

Ease into new routines. Whether you’re new to fitness or returning after a break, increase intensity gradually.

Listen to your body. Pain and fatigue are signals, not challenges to override.

Know the symptoms. Dark urine, severe swelling, and unexplained weakness are not to be ignored.

Rest and recovery matter. Muscles grow and repair when you rest—not when you overtrain.