Spending any part of winter in Beijing means dealing with varying degrees of smog and pollution. This year, the Chinese government has decided to issue red alerts when heavy smog (AQI exceeding 200) is expected to last for two or more consecutive days, and advise children and seniors to stay indoors as much as possible, people to reduce outdoor activities. Schools are closed and the number of motor vehicles on the roads are restricted. In December alone, two red alerts were issued, each preceding five to six consecutive smog-filled days.
Needless to say, it’s pretty difficult to avoid discussions about the smog in Beijing whether in the real or virtual world (inside or outside of the Great Firewall of China). Old-timers and newcomers alike moan about breathing difficulties, feeling poorly/depressed and the need to wear a mask outdoors and turning on air purifiers for days on end.
The athletic community, on the other hand, obsess about the health benefits (or lack thereof) of exercising (indoors or out) when air quality is obnoxiously bad. Many early morning group rides in the warmer months have been preceded by conversations of personal limits when it comes to AQI levels, and aborted when the northern winds don’t arrive as per the weather forecast.
As you can see from the screen shot of the Wake Me Run Run app on my Iphone, my personal AQI upper limit is 150. I figured if I’m going to forsake two hours of sleep to exercise outside, I’d rather do it in decent quality air. I’ve cycled outside when the AQI hovered between 180 and 200 and found it hard to breathe even with a mask on. When the AQI exceeds 300 outside, I find it tough even running 5 km on the treadmill in the gym with the air purifiers turned on.
I’ve met athletes whose performance seem unaffected even when the AQI exceeds 200 and I’m truly envious of them. But we all know that the PM2.5 air particles we suck right into our lungs stick around for a long time, if not forever, with the potential to give us respiratory problems or even cancer in the future.
All hope is not lost (yet). There’s been quite a few studies conducted overseas about the benefits of exercising outside in polluted air. One of my tri mates (he came in second in his very competitive age group at last year’s Beijing International Triathlon) wrote a piece on this topic, listing his personal limits for exercising and citing a number of articles on these studies. The overall consensus seems to be that it’s better to do some exercise than not at all, but keep it to under an hour when the air quality is poor (150-300) and do nothing when the AQI is higher than 300.
On a positive note, we’ve been getting clean air for the most part since the second week of 2017 as temperatures drop to sub-zero. I’ve overcome my fear of the biting cold and run outside three times, relishing every minute. Now if I can get my hands on a balaclava mask, I might just muster up courage to cycle outside this weekend.