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> so i'd assume that short times more often is better I wouldn't assume this. The logical end of this is to split your exercise into many tiny bursts througho
by dpark 10y ago
> so i'd assume that short times more often is better
I wouldn't assume this. The logical end of this is to split your exercise into many tiny bursts throughout the day. But it's likely that sustained output is an important part of exercising. The shorter your exercise, the less likely you are to get your heart into an elevated range, the less likely you are to cause an oxygen-depleted state (which encourages vascular growth), the less likely you are to use a significant portion of your free glucose (which is important for insulin sensitivity), etc.
I don't know where the threshold is, but it seems like a bad idea to assume that shorter, more often is better. It likewise seems like a bad idea to assume that longer blocks are better (or just as good). Any exercise is far better than none, but there is a lot of support for ~30 minutes ~daily being extremely valuable. Absent evidence, I'd be hesitant to assume that some other arbitrary division of exercise would yield the same results.
- darkerside 10y ago> the less likely you are to cause an oxygen-depleted state I don't know if this is a safe assumption either. What makes you think it would take more than a few minutes of acute exercise to reach an oxygen depleted state?
- dpark 10y agoBasic physics. Assuming you are generally healthy, your body is not usually in an oxygen-depleted state. Therefore it will take some amount of time in a state of increased oxygen use to cause oxygen depletion. Therefore, "the shorter your exercise, ... the less likely you are to cause an oxygen-depleted state". Depending on your fitness level and exercise level, it will take more or less time to put you into this state. An overweight, sedentary person sprinting will be there pretty much instantly. A marathon runner walking briskly won't get there in any amount of time. But all things being equal, more time exercising will be more likely to put you into an oxygen-depleted state (and glucose depleted state, and elevated heart rate).
- darkerside 10y agoFor endurance athletes like your marathon runner, this is certainly the case. Strength and power athletes can certainly expend far more energy in a shorter time than someone who is less fit. It's a bit of a paradox where the better shape you are in, the sooner you can tire yourself out. From everything I've read, it certainly seems possible to reach oxygen depletion in a very short period of time. https://mobile.nytimes.com/blogs/well/2016/04/27/1-minute-of-all-out-exercise-may-equal-45-minutes-of-moderate-exertion/?referer= https://mobile.nytimes.com/blogs/well/2016/04/27/1-minute-of...