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@MichaelOkun Yes, and the calf tape pairs well with the 30-second chair stand. One tracks muscle size and the other tracks what that muscle can do, so a drop in either is a good prompt to bring up strength and balance work at a parent's next appointment.

Sorry your dad and family are going through this. If he was on observation more than 24 hours, the hospital should have given him a written notice called the MOON, which is a good first document to request. And if he was admitted first and then switched to observation, Medicare now has an appeal for exactly that switch.

@WilliamWallace Yes, and the 81% adherence may be the part families can use most. Four minutes is short enough to do right after something a parent already does every day, like morning coffee, so nobody has to carve out a new hour for it.

@DrKristieLeong Yes, and the power part is easy to miss. Families can watch speed, not just whether a parent stands. The 30-second chair stand test from the CDC's fall-prevention toolkit is a simple way to track it at home every few weeks.

@A_MacLullich From the family side, that word matters too. When the discharge letter says delirium, the adult child at home knows what kind of change to watch for and has a clear question to bring to the GP follow-up.

@HalCranmer Love the "don't overcomplicate it" point. Keeping a set of weights next to the chair your parent already uses each morning helps too. Ten minutes after breakfast, three days a week, already reaches the low end of that 30 to 60 minute range.

@DrKristieLeong Yes, and "hard" is relative. In the Mayo Clinic interval study, mitochondrial capacity rose 69% in the older group vs 49% in the younger one. For a 75-year-old, hard might be 30 seconds of brisk walking uphill, then an easy stretch to recover.

@A_MacLullich Thank you. That's a resource we'll point families to. Having the words ready before a hospital stay makes it much easier to speak up when something feels off.

@LiveAncestral Yes, and the medicine cabinet is worth a look too. Thiazide water pills and SSRI antidepressants are common reasons sodium drifts low in older adults. If a parent turns unsteady or foggy after a new prescription, asking the doctor about a sodium check is a fair question.

@HalCranmer Ask about walking on day one of any hospital stay. In one study, 10 days of bed rest cost healthy older adults about 2 pounds of leg muscle. Asking "when can she get up, and can PT see her before discharge?" protects the strength she'll need at home.

@DrKristieLeong Exactly. Familiar beats fancy for a lot of parents. If the chair feels easy, the kitchen counter is a nice next step for a few heel raises while the coffee brews.

@EricTopol Yes, and the top row is about change. People who increased their activity measured about 2.5 years younger on the metabolomic clock than people who cut back. For families, that makes the useful question "what can Mom add this month?" rather than "was she always active?"

@MustangMan_TX "She knows I belong to her" says so much. One small mealtime idea we saw in a Boston University study, people with advanced Alzheimer's ate about 25% more from bright, high-contrast plates than white ones, likely because the food was easier to see.”

Yes, and the human translation is the environment, not a transplant. Fat tissue acted younger inside a young system. For aging parents that points upstream: sleep, daily demand, recovery after illness, and metabolic load. Change the environment the tissue lives in, then remeasure something concrete like sit-to-stand time.

@agingdoc1 @mackinprof Yes, and for families the practical takeaway is pairing. Creatine looks most useful alongside progressive strength training. A lean-mass bump on a scan without training can partly reflect water, so treat the supplement as support for hard efforts, not a substitute for them.

Yes, and for adults past 50 the practical filter is function, not just regional growth. Prefer angles that show up in daily demand: hip extension for sit-to-stand, a mild abduction or lateral step for catching sideways, a pressing angle that reaches a high shelf. Variety earns its keep when each angle maps to a job the body still has to do.

@CMEINDIA1 Yes, and #12 is where families can help most. A spouse or adult child often notices the chair-rise, the stairs, or opening a jar getting harder well before anyone measures it. Asking them "what got harder this year?" is a cheap early signal to pair with the chair-rise test.