If you've been in any Cebu running group this week, you've probably seen the question: is it still okay to run outside? Air quality readings have been coming up in conversation more than usual, and it's a fair thing to ask.
The short answer is: it depends on the number. Here's how to read it and what to actually do with that information.
What AQI Means for Runners
AQI stands for Air Quality Index. The higher the number, the more pollutants are in the air. For most people going about their day, moderate air quality isn't a big deal. But running is different because you're breathing harder and faster — you're taking in a lot more air than someone just walking to their car.
Here's a simple breakdown of what the numbers mean if you plan to run:
- 0 to 50 (Good) — No issues. Run as planned.
- 51 to 100 (Moderate) — Fine for most runners. If you're sensitive to air quality or have asthma, consider shortening the run or slowing down.
- 101 to 150 (Unhealthy for Sensitive Groups) — Casual runners should be cautious. Cut the intensity. Skip long runs or hard workouts and save those for better days.
- 151 to 200 (Unhealthy) — Most runners should consider moving the session indoors or resting. Not worth pushing through this if you have a choice.
- 200 and above (Very Unhealthy) — Skip the outdoor run. No race PR is worth breathing this for an hour.
You can check the current AQI reading for Cebu on IQAir (iqair.com) before you head out. It updates regularly and gives you a real-time reading for Cebu City.
The Best Time to Run When Air Quality is Poor
Early morning is almost always your best window. Traffic is light, factories and vehicles haven't been running for hours yet, and temperatures are lower. If the AQI reading at 7 AM is borderline, it will almost certainly be worse by noon.
Avoid running near main roads during peak traffic hours. The pollution from vehicles is a big contributor to poor air quality readings, and running along Osmena Boulevard or Mandaue-Mactan Bridge during rush hour is a different experience from running at 5 AM on the same route.
Spots in Cebu With Naturally Better Air
Not all running spots are equal when air quality is a concern.
Tops / Busay Road is probably your best option. Higher elevation means you're above a lot of the city's ground-level pollution. The air there genuinely feels different from running in the city proper.
SRP benefits from sea breeze, which helps disperse pollutants. On days when the city feels thick, SRP along the bay tends to be noticeably cleaner.
IT Park and Business Park are convenient but surrounded by traffic and commercial activity. They're fine on good air quality days but probably not the first choice when readings are elevated. Many running groups in Cebu already know which spots to shift to on bad air days — another good reason to run with a crew.
How to Adjust Your Training
You don't have to cancel every run the moment the AQI ticks above 100. But you should adjust.
Slow down. At a slower pace, you're breathing less intensely and taking in less of whatever is in the air. A recovery run at easy effort is a much lower risk than a tempo session or speed intervals at the same AQI level. If you don't have a GPS watch, Run Buddy gives you real-time pace cues so you can stay in the right effort zone without staring at your phone.
Shorten the run. A 30-minute easy run on a 120 AQI day is a different calculation than a two-hour long run. Reduce exposure time when the numbers are elevated. Log how you felt after each session on RunMate — over time you'll notice patterns between the AQI reading and how your body responded.
A running mask rated for particulate matter (N95 or similar) can help on borderline days. It's not glamorous but it does reduce what you're actually breathing in. Some runners in Cebu have been using them during high-pollution periods and it's becoming less unusual to see.
Signs You Should Stop Mid-Run
Your body will tell you before the numbers do. If you notice any of the following, cut the run short and head home:
- Unusual chest tightness or difficulty breathing beyond normal running effort
- Headache that gets worse as the run goes on
- Throat irritation or burning sensation when breathing
- Dizziness or lightheadedness that isn't explained by pace or heat
These aren't signs to push through. They're your body flagging something real.
Rest Days Are Part of Training
If the air quality is bad and you have a hard session scheduled, moving it to the next day is not falling behind. It's smart training. One skipped run does not undo weeks of work. Running hard in bad air can set you back further than a rest day ever will.
Use the day to check what fun runs are coming up in Cebu and plan which race you're targeting next. The training will still be there when the air clears. So will your race journal.
Norman
Founder, RunMate