How Strenuous Exercise Affects Our Immune System • Hacker News Board

Re: How Strenuous Exercise Affects Our Immune System

#91

Post by gonehome » Fri, May 04, 2018, 4:45 PM UTC

the_cat_kittles wrote: post #69

nimbius wrote: post #40

As a machinist and building maintenance engineer, I can almost guarantee any ill feeling you're experiencing after a trip to your local gym is due to the air quality. Gyms are rarely purpose built facilities. Rather, theyre rented and renovated spaces. In turn, airflow in the structure is planned for light industrial or office space. Almost no thought goes into the fact that gyms are sometimes hundreds of occupants m…

i have a pet fascination with air quality- not in any real sense, but im always just wondering about it, since its so varied and virtually invisible. are there any simple small tools you know of that are good at get information about air quality. the only thing i see people sometimes use is a particulate meter that tells them the concentration of particulate matter of various sizes. seems like it would be cool to hav…

I have one of these that I bought mostly on a whim because I was curious about it.

https://getawair.com

It does a decent job.

Re: How Strenuous Exercise Affects Our Immune System

#92

Post by graeme » Fri, May 04, 2018, 4:45 PM UTC

the_cat_kittles wrote: post #69

nimbius wrote: post #40

As a machinist and building maintenance engineer, I can almost guarantee any ill feeling you're experiencing after a trip to your local gym is due to the air quality. Gyms are rarely purpose built facilities. Rather, theyre rented and renovated spaces. In turn, airflow in the structure is planned for light industrial or office space. Almost no thought goes into the fact that gyms are sometimes hundreds of occupants m…

i have a pet fascination with air quality- not in any real sense, but im always just wondering about it, since its so varied and virtually invisible. are there any simple small tools you know of that are good at get information about air quality. the only thing i see people sometimes use is a particulate meter that tells them the concentration of particulate matter of various sizes. seems like it would be cool to hav…

You can get CO2 meters quite easily on amazon. They sell them as a commodity for greenhouses measurement.

For particulates, the Laseregg is the best I've found.

Apparently the laseregg 2+ measures VOC, but I'm not sure about that. From what I heard there are no VOC meters available at a consumer level. CO2 is the best proxy, because high CO2 means low ventilation, which prevents venting of VOCs.

Re: How Strenuous Exercise Affects Our Immune System

#93

Post by smnplk » Fri, May 04, 2018, 4:46 PM UTC

sp332 wrote: post #68

mrfusion wrote: post #66

Earlier quoted context omitted.

Why do you think cycling would burn more calories than jogging?

Jogging is very efficient, mechanically speaking. You're not going to burn a lot of calories per hour.

You need to put more effort in 1 hour cycling session to burn the same amount of calories as in 1 hour running session. Running activates more muscles.

Re: How Strenuous Exercise Affects Our Immune System

#94

Post by paulcole » Fri, May 04, 2018, 4:46 PM UTC

evo_9 wrote: post #70

Started doing Tabata sprints a couple years ago. Amazing how much more effective they are versus running at a slower pace for 40 minutes (my old routine). Also, never knew this, they make self-powered treadmills which are really ideal for sprinting on. I just bought a ASUNA Hi-Performance Cardio Trainer Self Powered Manual Treadmill, it's pretty much ideal for Tabata/sprinting for a home-gym.

Effective at what?

Re: How Strenuous Exercise Affects Our Immune System

#95

Post by beala » Fri, May 04, 2018, 4:47 PM UTC

mkirklions wrote: post #5

This article doesnt make mention of my workout where I lift something heavy 1 time. I had the idea that I wanted to reduce time in the gym, so I used the potential energy equation PE= M g h I'm not getting any taller, so the only thing I could change was either the reps or mass of weight moved. I made it my goal to lift heavy weights so I'd only need to deadlift 1 time and be able to pig out. TBH, it works, I lose 1…

Ok, let's think about the energy equation. In order to do as much work with a one rep workout versus a standard 5x5 (five sets, five reps) workout, you'd need to be lifting 25 times more weight (one rep total vs 25 reps total). The problem is, your one rep max is not going to be 25 times your 5x5 max.

In any case, I don't think the premise underlying this makes sense. Resistance training is for triggering muscle growth, not burning calories. Perhaps there's some biological reason why a 1 rep workout is effective for you, but I don't think the PE equation helps here.

Re: How Strenuous Exercise Affects Our Immune System

#96

Post by pygy_ » Fri, May 04, 2018, 4:47 PM UTC

amelius wrote: post #76

nimbius wrote: post #40

As a machinist and building maintenance engineer, I can almost guarantee any ill feeling you're experiencing after a trip to your local gym is due to the air quality. Gyms are rarely purpose built facilities. Rather, theyre rented and renovated spaces. In turn, airflow in the structure is planned for light industrial or office space. Almost no thought goes into the fact that gyms are sometimes hundreds of occupants m…

> I can almost guarantee any ill feeling you're experiencing after a trip to your local gym is due to the air quality. That wouldn't make much sense: what if you feel ill only after doing certain exercises (e.g. cardio versus weight lifting)?

Aerobic exercises requires more breathing, exacerbating any air quality problem...

Re: How Strenuous Exercise Affects Our Immune System

#97

Post by graeme » Fri, May 04, 2018, 4:48 PM UTC

dominotw wrote: post #60

nimbius wrote: post #40

As a machinist and building maintenance engineer, I can almost guarantee any ill feeling you're experiencing after a trip to your local gym is due to the air quality. Gyms are rarely purpose built facilities. Rather, theyre rented and renovated spaces. In turn, airflow in the structure is planned for light industrial or office space. Almost no thought goes into the fact that gyms are sometimes hundreds of occupants m…

Not sure what I can do with this information. I live in a crowded city and this is the only place I can get a workout.

Depends on the exercises you do. An outdoor gym is feasible depending on climate, air pollution, and what's available in parks. (Or simply cycling/jogging outside)

Home gyms can cover part of it. You can do a lot with a chinup bar, bodyweight exercises, powerblock dumbell sets.

I'm actually in a city too cold to go without a gym year round, and I do barbells so I can't do those at home (space too small). But, mentioning the options above for those who don't have the same constraints.

Re: How Strenuous Exercise Affects Our Immune System

#98

Post by jhayward » Fri, May 04, 2018, 4:49 PM UTC

Anecdotally: when I was a bike racer I noted that if I was so exhausted after a hard training ride (usually 5+ hours, >100 miles) that I was involuntarily falling asleep afterward that I would inevitably come down with a sore throat leading to a cold within 12-24 hours. 100% of the time.

I've had maybe 2-3 colds in the decades since I quit racing.

Re: How Strenuous Exercise Affects Our Immune System

#99

Post by paulcole » Fri, May 04, 2018, 4:50 PM UTC

hathawsh wrote: post #78

flcknzwrg wrote: post #17

Earlier quoted context omitted.

Found the fatty ;) Ok, seriously.... math: if you eat 3000 kcal per day and lose 1 lb per week, you're burning 3500 kcal per day. This is quite a lot. It's near impossible unless you work out a lot and are veeeery muscular... or are impossibly tall... or, well, fat. (Or a combination of those.) Take me for comparison: I am 187cm (6'1ish) tall and weigh 75kg (165 lbs), pretty much smack in the middle of the "normal we…

A couple of years ago, I took a half-day hike up a mountain called Timpanogos with my son. According to my fitness tracker, I burned over 8000 kcal on that trip. It was a bit strenuous, but not painful. The estimate of calories burned seemed reasonable to me. EDIT: According to this chart, I probably burned around 600 kcal per hour: http://www.nutristrategy.com/caloriesburnedwalking.htm It took us about 8 hours, so t…

Your estimate has already gone from 8000 to 4800 and you're still relying on the unsourced data of NutriStrategy.

Who's willing to be the truth is significantly lower still?

Re: How Strenuous Exercise Affects Our Immune System

#100

Post by marban » Fri, May 04, 2018, 4:51 PM UTC

jhayward wrote: post #98

Anecdotally: when I was a bike racer I noted that if I was so exhausted after a hard training ride (usually 5+ hours, >100 miles) that I was involuntarily falling asleep afterward that I would inevitably come down with a sore throat leading to a cold within 12-24 hours. 100% of the time. I've had maybe 2-3 colds in the decades since I quit racing.

What was your hydration and nutrition like post/pre?