Planning an intense leg day? Chinese man suffered acute kidney failure; needed emergency dialysis after extreme workout

Are you one of those enthusiastic gymheads who "never skip leg day" to the extent that it has become an integral part of your fitness mantra? Sure, strong legs mean better athletic performance, better overall strength, and balanced muscle development.

But do you know if it comes with its fair share of cons as well?A recent case from China is serving as a stark reminder that more exercise is not always better exercise.Per the South China Morning Post, a 23-year-old university student in China's Henan province developed acute kidney failure and required emergency dialysis after pushing himself through an extremely intense leg workout.

What began as an ambitious attempt to build muscle quickly turned into a medical emergency that landed him in the hospital and sparked discussions about the dangers of overtraining.What happened?Per SCMP, a 23-year-old student in Henan, China, tried to go extra hard in his leg workout, hoping to fast-track his gains.

Instead, he ended up with acute kidney failure and had to get emergency dialysis.How did that happen?According to his doctor, nephrologist Liu Haofei at the First Affiliated Hospital of Henan University of Chinese Medicine, he was “trying too hard” in his leg training, which led to rhabdomyolysis.First, it was blood in his urine, then he stopped urinating at all.

When he went to the hospital, he could not even walk by himself!As per Liu, the 23-YO’s creatine kinase level, which is an indicator of muscle damage, had exceeded 20,000 units per litre — it was over 100 times the normal level.

The student needed dialysis immediately.Medical reports suggest that he pushed his body beyond its limits during the workout, and doctors eventually diagnosed him with acute kidney failure caused by exertional rhabdomyolysis, which is a condition that occurs when muscle tissue breaks down so severely that proteins and other cellular contents leak into the bloodstream.What is rhabdomyolysis?For the unversed, exertional rhabdomyolysis is a nasty condition where your muscles break down so much from intense exercise that they actually release proteins and other stuff into your blood, seriously damaging your kidneys.

Although the name sounds complex, the basic mechanism is relatively straightforward.

Rhabdomyolysis occurs when muscle fibers break down rapidly and release substances, including a protein called myoglobin, into the bloodstream.Sure, muscles routinely experience microscopic damage during exercise, but rhabdomyolysis represents muscle breakdown on a much larger scale.

In extreme cases, it can turn deadly.The kidneys are usually responsible for filtering waste products from the blood.

When large amounts of myoglobin enter the circulation, the kidneys can become overwhelmed, leading to acute kidney injury and, in severe cases, kidney failure.What’s more concerning is that it is not the first case that has reportedly suffered from rhabdomyolysis due to a hard workout.Per SCMP, this year, a 24-year-old man in eastern China’s Zhejiang province showed symptoms of rhabdomyolysis 20 days into his fitness training and was admitted to the hospital.

He reportedly had been lacking exercise and worked out after work for 20 days consecutively.In 2024, another 26-year-old man in central China’s Hubei province intensified his exercise to develop eight-pack abs and boost his success in order to impress a woman.

He did an hour of high-intensity crunches and leg raises.

The next day, he found the muscles in both thighs were extremely painful, and he urinated blood.

Long story short, he was then diagnosed with rhabdomyolysis.What are the warning signs?One of the reasons why rhabdomyolysis can be dangerous is that many people initially mistake it for normal post-workout soreness.

However, it’s important to pay attention to your body to tell it apart from just post-workout exhaustion.Per experts, symptoms of this condition often include unusually severe muscle pain, significant swelling, muscle weakness, and difficulty moving the affected body part.

One of the most important warning signs is dark, tea-colored, or cola-colored urine.Other symptoms may include nausea, vomiting, fever, fatigue, and reduced urine output.

In severe cases, electrolyte imbalances and kidney injury can develop.Experts emphasize that dark urine after intense exercise should never be ignored, especially when accompanied by severe muscle pain or swelling.Why are leg workouts involved?The legs contain some of the biggest muscles in the human body, including the quadriceps, hamstrings, and glutes.

Large muscle groups mean larger consequences.

During an extremely intense training session (if you include heavy squats, lunges, leg presses, or high-volume repetitions), there can be substantial muscle damage due to the amount of strain on muscles.However, this does not mean leg workouts are inherently dangerous.

Millions of people train their legs safely every week.

But when people suddenly jump from little or no exercise to very intense sessions, attempt extreme challenges, ignore pain, or train aggressively in hot conditions without proper hydration and recovery, the risk doubles.So, how should people approach leg day safely?Consistently.

Steadily.One of the biggest mistakes beginners make is trying to train heavy like experienced athletes from day one.

It’s basic — muscles, tendons, and cardiovascular systems need time to adapt to increasing workloads.

Progressive overload (the principle of increasing weight, repetitions, or training volume gradually) is considered far safer than dramatic jumps in intensity.Besides, hydration is also crucial when one is working out significantly.

Because they literally “sweat it out” at the gym, dehydration can increase the risk of complications during strenuous exercise and can make it harder for the kidneys to cope with muscle breakdown products.More importantly, recovery matters just as much as the workout itself.

Make sure to get adequate sleep and proper nutrition.

Remember, rest days are the time-out periods that help muscles repair and adapt.

Ignoring recovery can increase the risk of injury and overtraining.Finally, pay attention to your own body.

Listen to the warning signals, if any.

Slow down, based on that.

Severe pain is not the same thing as productive training.Mild soreness after exercise is common.

But in case you encounter extreme swelling, debilitating pain, inability to straighten or bend limbs, or dark urine, make sure to check with a professional healthcare provider without delay.Get the latest movie news, reviews, and celebrity updates.

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