Leg Numbness During Exercise: Causes and Solutions

Q: Leg Numbness During Exercise: Causes and Solutions

Hello： Your symptoms of paresthesia may need to first consider "hyperventilation syndrome." When it occurs, it leads to a decrease in carbon dioxide levels in the blood, resulting in an increase in pH, which triggers systemic reactions and symptoms. <br>Commonly observed symptoms

Numbness in the legs during exercise?

Hello, doctor.
I exercise 3-4 days a week, and I am 183 cm tall and weigh 110 kg.
I primarily do aerobic exercises on the elliptical machine, and I used to be able to work out for over 50 minutes without any issues.
However, in the past two days, after about 30 minutes of exercise, my calves start to feel numb, and if I push through longer, I begin to feel uncomfortable all over, with a slight tingling sensation on my scalp.
Additionally, I tend to sweat a lot, and after exercising, there are usually puddles of sweat on the floor.
I noticed that this was particularly pronounced yesterday.
For the past two days, I have been eating breakfast around 9 AM and then going to the gym at 2:30 PM.
I am quite concerned that I might have diabetes, but I get a health check-up every December, and my HbA1c and blood sugar levels are always normal.
I am unsure what this situation might indicate.

Weiwei, 30~39 year old female. Ask Date: 2020/09/21

Dr. Jiang Junyi reply Neurology

Hello: Your symptoms of paresthesia may need to first consider "hyperventilation syndrome." When it occurs, it leads to a decrease in carbon dioxide levels in the blood, resulting in an increase in pH, which triggers systemic reactions and symptoms.
Commonly observed symptoms include vasoconstriction and decreased calcium levels in the blood.
The blood flow to the brain is reduced due to vasoconstriction, which can cause dizziness, numbness (especially around the lips and in the extremities), and weakness.
This may subsequently trigger sympathetic nervous system activation.
During exercise, the sympathetic nervous system is stimulated, leading to increased heart rate, faster breathing, and increased sweating.
Once exercise stops, the parasympathetic nervous system begins to take effect, slowing the heart rate, reducing the breathing rate, and decreasing sweating.
It is recommended that you consult a neurologist to discuss the examination of autonomic nervous function and treatment.
Wishing you good health and peace.
Dr.
Jiang from Taoyuan Hospital cares about you.

Reply Date: 2020/09/21

More Info

Hello! Thank you for your question regarding leg numbness during exercise. It's great to hear that you are committed to maintaining an active lifestyle by exercising 3-4 times a week. However, experiencing numbness in your calves and discomfort during your workouts can be concerning and warrants further exploration.

Leg numbness during exercise can be attributed to several factors, including nerve compression, circulation issues, or muscle fatigue. Given your height of 183 cm and weight of 110 kg, it’s possible that the intensity and duration of your workouts may be contributing to these sensations. Here are some potential causes and solutions to consider:
1. Nerve Compression: When you exercise, certain positions or movements can compress nerves in your legs, leading to numbness. This is particularly common if you are using equipment like a treadmill, where your posture may not be optimal. Ensure that your form is correct and that you are not leaning too heavily on the machine, which can lead to nerve compression.

2. Circulation Issues: Excess weight can sometimes lead to circulation problems, especially during prolonged periods of exercise. If your blood flow is restricted, it can result in numbness or tingling sensations. To improve circulation, consider incorporating a warm-up routine that includes dynamic stretches to get your blood flowing before you start your cardio workout.

3. Muscle Fatigue: If you are pushing yourself too hard, your muscles may become fatigued, leading to sensations of numbness. It’s essential to listen to your body and not push through discomfort. If you feel numbness, it may be a sign that you need to reduce the intensity or duration of your workouts. Gradually increase your workout time and intensity to allow your body to adapt.

4. Hydration and Nutrition: Since you mentioned sweating a lot during your workouts, ensure that you are adequately hydrated. Dehydration can lead to muscle cramps and discomfort. Additionally, consider your nutrition; a balanced diet rich in electrolytes can help maintain muscle function and prevent cramps.

5. Timing of Meals: You mentioned that you eat breakfast at 9 AM and then exercise at 2:30 PM. Depending on what you eat, you might be exercising on a full stomach, which can lead to discomfort. It might be beneficial to have a light snack about 30-60 minutes before your workout to provide energy without causing discomfort.

6. Medical Concerns: While you have normal HbA1c and blood sugar levels, it’s still wise to monitor your health closely, especially if you have concerns about diabetes. If the numbness persists or worsens, it would be prudent to consult a healthcare professional. They can perform a thorough evaluation to rule out any underlying conditions, such as peripheral neuropathy or vascular issues.

In summary, while leg numbness during exercise can be concerning, it is often manageable through adjustments in your workout routine, hydration, and nutrition. Pay attention to your body’s signals, and don’t hesitate to seek medical advice if the symptoms persist. Remember, maintaining a healthy lifestyle is a journey, and it’s essential to prioritize your well-being along the way. Happy exercising!

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