On the evening of July 12, Li Ming returned home after running and collapsed into a chair. When he tried to stand up, he discovered he couldn't move his limbs. After being rushed to the hospital, Li Ming was diagnosed with hypokalemia, caused by prolonged intense running.Doctors explained that this condition causes symptoms like dizziness and limb weakness, and in severe cases, can even be fatal!
Is more exercise always better? BMJ journal: Not necessarily—running just once a week significantly lowers mortality risk!
As a "zero-barrier" activity, running is immensely popular. With just a pair of shoes, anyone can easily achieve their fitness goals.
However, running requires careful consideration. Some believe that more frequent and longer runs lead to longer life, while others advocate moderation to avoid life-threatening risks like those faced by Li Ming. So, is more exercise truly better?
A recent study published in the British Journal of Sports Medicine provides insights.The findings indicate that running can improve health regardless of intensity level—even 50 minutes weekly yields better outcomes than no running at all.
Researchers analyzed 14 studies involving 232,149 participants, with follow-up periods ranging from 5.5 to 35 years and a total of 25,951 deaths recorded. The meta-analysis revealed that compared to non-runners, runners experienced a 27% lower risk of all-cause mortality, a 30% lower risk of cardiovascular disease mortality, and a 23% lower risk of cancer mortality.
Crucially, the research also revealed no clear dose-response trend between running frequency and mortality. This means any amount of running appears to significantly lower mortality risk. Even the smallest running doses identified in existing studies—such as running once a week, or just 50 minutes weekly at speeds below 9.6 km/h (30 mph) and energy expenditure under 500 MET-min/week—seem to improve health and extend lifespan.
In a nutshell: Whether you run a lot or a little, it's exercise—and running is always better than not running!
Running is a double-edged sword—how to run scientifically?
The human body is like a dam: if not reinforced, it will eventually collapse! In recent years, more and more people have taken up morning or evening runs, which not only enhance physical fitness but also help make friends and expand social circles.
However, running is a double-edged sword. Improper running can cause minor injuries like joint ligament damage or even life-threatening risks. Only scientific running can achieve the goal of strengthening the body. So, what should you pay attention to for scientific running?
First, when to run?
In summer, avoid peak heat by running early morning or evening. In winter, steer clear of extreme cold by choosing times like "after sunrise" or "before sunset." Always run half an hour after meals.
Second, where should you run?
Both indoor and outdoor options are viable. For outdoor running, choose fresh air and flat surfaces like asphalt roads or synthetic tracks.
Third, how should you run?
For most people, focus on slower-paced middle-to-long distance runs. Older individuals may opt for low-intensity forms like walk-run intervals, steady-state running, or interval training. Maintain proper form: keep your upper body stable, lower body sufficiently extended, and synchronize your stride with your breathing.
Fourth, how to determine exercise volume?
Two methods can be combined to assess your suitable exercise volume: objective physiological measurements and subjective perception.
Objective physiological indicators include heart rate, blood pressure, weight, and lung capacity, with heart rate measurement being the simplest. Optimal exercise heart rate is a key indicator for evaluating workout effectiveness.
Optimal Exercise Heart Rate Zone Calculation (for the general population):
(220 - current age) × 0.8 = Maximum exercise heart rate;
(220 - current age) × 0.6 = Minimum exercise heart rate.
Optimal Exercise Heart Rate Zone Calculation (for individuals with heart conditions):
Morning pulse × 1.8 = Upper heart rate limit;
Morning pulse × 1.8 = Lower heart rate limit.
Using the above formula, a 50-year-old individual's exercise heart rate range is 102–136. A heart rate exceeding 136 indicates excessive exertion, while a rate below 102 suggests suboptimal training effectiveness.
Another method for determining exercise intensity is observing your subjective feelings.If you feel relaxed and energized during your run, with a desire to continue, or experience mild fatigue afterward that doesn't interfere with daily life and resolves within 1-3 hours, your running intensity is appropriate.
If within 4-24 hours post-run you experience poor appetite, insomnia, lingering fatigue the next day, or no desire to run again, your workout intensity is too high. Adjust accordingly.
If you notice muscle tightness, stiffness, numbness, soreness, or worsening pain in affected areas, it may indicate hidden inflammation. Reduce intensity or stop exercising.If you experience muscle tightness, stiffness, numbness, soreness, or worsening/spreading pain, be cautious of potential hidden inflammation. Reduce intensity or pause training. Fifth, what should you pay attention to when running? Always warm up thoroughly before running and cool down afterward with activities like slow walking. Wear loose clothing and choose athletic shoes with appropriate cushioning.It's crucial to emphasize that running should be progressive and within your limits—avoid overexertion.
In summary, running is a great ally for health—just run! However, before starting, objectively assess your physical condition. Don't rely solely on enthusiasm; ideally, get tested at a professional sports facility or hospital to develop a scientifically sound running plan tailored to your needs.