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How Strenuous Exercise Affects Our Immune System

nytimes.com

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Re: How Strenuous Exercise Affects Our Immune System

#161

Post by whitepoplar »

coastal-fiesta wrote: post #159
awakeasleep wrote: post #49

Earlier quoted context omitted.

You’re not even mentioning CO2 concentration. I work in a large, open office with seemingly sufficient airflow, but after buying a CO2 detector on a whim I’ve seen that it frequently reaches 1200ppm, and you actually can tell that you feel like crap when that happens. I can’t imagine if the whole office was filled with people exercising.

Do you have a link to a CO2 detector that you recommend?

this one is best: https://www.amazon.com/CO2Meter-AZ-0004-Temperature-Relative...

Re: How Strenuous Exercise Affects Our Immune System

#162

Post by alttag »

r00fus wrote: post #160
DoofusOfDeath wrote: post #71

Earlier quoted context omitted.

I don't know, but I'd love to see some study on the impact of CO2 levels on the measures we typical care about regarding meetings: levels of alertness, qualities of social interaction, decision-making speed/quality, etc.

I've worked a few days in a consulting sweatshop before (lots of consultants in a warehouse like environment near clients office). I don't know if the air was rich in CO2 but it definitely was stale in there. The overall feeling I got was "tired". My eyes didn't want to stay open. My mind felt like gauze was wrapping it. My attitude was mellowed and slightly depressed. It took more effort to move (even to walk to the…

Possibly several things going on, of which O2 may be only one. Research also shows taking breaks and exposure to nature both have revitalizing effects.

Re: How Strenuous Exercise Affects Our Immune System

#163

Post by iramiller »

mikestew wrote: post #138
sternocleidom wrote: post #39

Earlier quoted context omitted.

Running is probably the worst sport as far as caloric expenditure is concerned. A serious endurance cyclist or swimmer will certainly go through 3000 kcal on a normal training day if not more. I've burned an estimated 5000kcal daily on the bike for weeks. What's more is I know these numbers are very accurate as we train with power meters that record our energy expenditure with minimal error. It's important to disting…

Running is probably the worst sport as far as caloric expenditure is concerned. Yes, running is extremely inefficient. The most efficient form of movement known is a human on a bicycle. One's choice depends on whether the goal is to burn calories, or travel efficiently. I've burned an estimated 5000kcal daily on the bike for weeks. Wait a minute, what? You're going to take the most efficient form of locomotion and us…

Rate of calorie burn on a cycle is highly dependent on speed. Riding at 32km/h or higher absolutely consumes significant energy due to wind resistance.

Re: How Strenuous Exercise Affects Our Immune System

#164

Post by ambicapter »

danmg wrote: post #141
cpsempek wrote: post #126

Earlier quoted context omitted.

This depends on the lifter's weight (which is why there are weight classes in power and oly lifting competitions).

For an average male, that should be obtainable in about 6 months to a year.

You're ridiculous. You can say 315 is achievable in a year. 450 lbs doesn't even get on the charts for any weight up to 310 until intermediate level according to this chart [0]. Nobody with any sense considers themselves to be an 'intermediate' lifter after one year.

[0] https://strengthlevel.com/strength-standards/deadlift

Re: How Strenuous Exercise Affects Our Immune System

#165

Post by r00fus »

alttag wrote: post #162
r00fus wrote: post #160

Earlier quoted context omitted.

I've worked a few days in a consulting sweatshop before (lots of consultants in a warehouse like environment near clients office). I don't know if the air was rich in CO2 but it definitely was stale in there. The overall feeling I got was "tired". My eyes didn't want to stay open. My mind felt like gauze was wrapping it. My attitude was mellowed and slightly depressed. It took more effort to move (even to walk to the…

Possibly several things going on, of which O2 may be only one. Research also shows taking breaks and exposure to nature both have revitalizing effects.

That place felt way different than my normal work office. Everyone onsite I talked to said the same thing.

Re: How Strenuous Exercise Affects Our Immune System

#166

Post by chrisfosterelli »

sternocleidom wrote: post #114
chrisfosterelli wrote: post #77

Earlier quoted context omitted.

> Running is probably the worst sport as far as caloric expenditure is concerned. This is not correct. They are relatively close, though in fact swimming on average will burn slightly less calories than running per hour of activity for most paces of comparative effort [0]. > I've burned an estimated 5000kcal daily on the bike for weeks This is around 3.5 to 10 hours of cycling a day depending on your weight and speed…

Check this out http://www.businessinsider.com/how-many-calories-cyclists-bu... "Each day participants ride, on average, about 100 miles and burn some 6,071 calories" As a competitive, but still amateur cyclist I would do something in this ballpark almost every day. Hence 3000 - 5000 calories. And I'd often run for an hour or play soccer on top of this since I wasn't a pro. I did spend a lot of hours on the bike, as s…

> "Each day participants ride, on average, about 100 miles and burn some 6,071 calories"

This is a very bad baseline for an average athlete. You are referring to pro athletes in a race event who average 40-45km/hr speeds on a notoriously hilly race. They don't maintain this level of exertion during training season, and an average athlete is nowhere even close to it.

> As a competitive, but still amateur cyclist I would do something in this ballpark almost every day. Hence 3000 - 5000 calories.

If you bike 160km a day, then you're cycling 4 - 6 hours a day. My original statement that you're not burning that many calories without ALOT of hours on the bike is correct.

> I did spend a lot of hours on the bike, as serious athletes tend to do. Years of experience with myself and many other national caliber athletes..

It's very impressive if you're able to sustain >30hrs week of exercise for weeks as you mention, but be cautious to not sound elitist.

Re: How Strenuous Exercise Affects Our Immune System

#167

Post by ugh123 »

awakeasleep wrote: post #49
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…

You’re not even mentioning CO2 concentration. I work in a large, open office with seemingly sufficient airflow, but after buying a CO2 detector on a whim I’ve seen that it frequently reaches 1200ppm, and you actually can tell that you feel like crap when that happens. I can’t imagine if the whole office was filled with people exercising.

Probably what he meant by "sometimes hundreds of occupants"

Re: How Strenuous Exercise Affects Our Immune System

#168

Post by dhimes »

kristerv wrote: post #65
WillPostForFood wrote: post #58

Earlier quoted context omitted.

What’s the theory behind the cold shower?

for me it wakes me the f up. It's strong like having drunk coffee or something. Results may vary of course, but works wonders for me and my focus during the day. I know of an old woman who's beed ice-cold bucketing for years and looks great and hasn't been sick in a long time. Does this with -20C outside too. Yet I find I may get sick easier if it's too cold outside and I go all out freezing shower.

But if s/he just went running s/he is probably pretty awake.

Re: How Strenuous Exercise Affects Our Immune System

#169

Post by [deleted] »

graeme wrote: post #97
dominotw wrote: post #60

Earlier quoted context omitted.

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, mention…

[deleted]

Re: How Strenuous Exercise Affects Our Immune System

#170

Post by jumpmancw »

patrickg_zill wrote: post #150
jumpmancw wrote: post #24

Earlier quoted context omitted.

It's actually very bad advice, do not do this. All of the literature will plainly tell you this is a bad idea.

My point is, actually, that whenever someone says "I just do 1 set or 1 rep and am done, after warmup" that the warmup sets are really part of the exercise... looks like mkirklions responded and really he does 5 sets with increasing weight, then does his heaviest. So it is more like the classic "pyramid" or "increased weight until near-exhaustion" sets, which have been around since forever...

It depends on what percentage of his 1rm he's doing. I use 531 and it's based off a training max which is 90% of your 1rm. You never lift heavier than about 85% of your 1rm on the program because doing so is heavily taxing on your CNS. Unless he is using PEDs he probably won't last long-term if he's lifting close to his 1rm twice a week.
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