Fragility & Aging.
Aging decreases the ability to deal with variation - also the ability to generate variation; the two are intrinsically related. They are two sides of the same coin.
The fragility of the coffee cup is fixed whereas a 20yr old can cope with a jump...
...from 20ft, but at 70yrs cannot cope with a jump from 10ft. Fragility in increasing.
The aging body is like a badly run business, it can't adapt to environmental challenges, randomness, and variation.
The body no longer has the system to deal with it; more precisely the system is working within a reduced range, it has degraded.
This is why as one ages, to slow down the downward spiral, it is *essential* to keep working the 'tails', the extremes...
...very high heart rates, strength, acidosis, HIIT, etc. Keeping your body's ability to generate and tolerate extremes is a superpower - it enables you to cope with the challenging environment, shocks and zombie attacks.
Do not take it easy by *only* doing moderate exercise, add in hard work (but don't over-exercise, you need to recover). Your ability to sprint goes first, then your ability to run, then your ability to walk - this is increasing fragility to things you used to be able to...
...take in your stride.
PHYSICAL ACTIVITY:
1 Resistance training – weights, circuits, and calisthenics
2 Intervals - short to long (anaerobic/acidosis/aerobic)
3 Daily low-level activity - aerobic base.
4 Occasional 'mega' challenges
LIFESTYLE:
1 Move out the City (pollution) if u can
2 Swap chronic, fragilsing stress for acute, robustifying stress
3 Get plenty of Sun and fresh air (Nature)
4 Get enough sleep
General Physical Standards (to retain) - you can add your own.
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