I get a ton of leakage around the edges of my surgical mask under physical exertion. It would be helpful to see the test results under real world applications rather than the sealed laboratory conditions used in the study.
I hear ya. We were originally forced to use N95's, but that seal was too tight. Physical exertion, in the context of how I'd describe in our real world application, is manually loading 5500 lbs of weight into an elevator, climbing stairs to the roof, (removing mask in the machine room because nobody is there), testing, putting on the mask again, taking control of the elevator, resetting switches on top and underneath, unloading the same weight, then transferring it across the hospital, manually, to another elevator (then repeating the process). We had one younger guy (by comparison, and he's a big boy) get dizzy and nearly pass out from having to breath through his mouth to pull in more oxygen. Suffice it to say, getting dizzy around elevator equipment is potentially lethal.
When it happened to me (didn't pass out, but started to get tunnel vision and lightheaded), I was in a confined space at a polymer plant in the heat trying to adjust a 1500 lb freight door by manually sliding it up and down the tracks and positioning locks. Not sure how hot it was in the pit, but the machine space was 137 on the thermometer. It was basically like shoulder pressing 180 lbs over and over again. I had on a spandex mask that completely covered my nose and mouth, but I thought it would give me more breathability because of the fabric. It did initially, but not nearly enough oxygen was being pulled in, because I also had to start mouth-breathing. I regained my ability to work after I threw it on the ground in frustration (they've since revisited that policy and it's not required after I filled out an incident report). As for surgical masks, the strings break 100% of the time when we use them, so we don't. Otherwise, we'd go through 100 a day, minimum, as a team.
Bottom line is, you can actually feel the bpm's going up and your respiration getting taxed in those settings. I didn't really need a study to determine this was having an adverse effect on my system, but I found one published somewhere when i was just reading a feed - so I shared it. Admittedly I only took a cursory glance and then skipped to the conclusion, but again; I didn't really need it to prove the point to myself. If you find flaws in it, I'll defer to your better judgement. Because I just drew the parallel to what I was experiencing.
The MORAL is, masks are important in large gatherings, sure, but basically fucking stupid in the context I described. There really does need to be some common sense employed when trying to figure out what's best for everyone.