Self testing regime.

Random grab bag of comments:

There is no need to track waist size weekly---it doesn't change that fast, and you can generally tell from pants when it has changed enough to take another measurement. I feel that measuring it with precision is difficult too.

I don't think a hearing test is particularly useful as an aging biomarker (too easily confounded by hearing loss due to loud noise, not clear it will recover as much as other markers on interventions, and it doesn't get at anything life threatening). Certainly wouldn't need to be frequent.

It's good to measure illness and pharmaceutical use (including antibiotics) through good manual note taking (along with body temp).

Sleep tracking is important and easy / low-time-required. Some of the sleep trackers like the Emfit QS (which I've had for years and really like) and I think Whoop Strap will even give you morning HRV automatically so you don't have to waste time recording it manually. Don't believe the sleep stage categorization except maybe on the new EEG based headbands like the Dreem & Philips Smartsleep, but even just knowing sleep efficiency (time spent in sleep as % of time trying) is useful.

In addition to blood tests (see the other thread on blood panels from LE), it's also good to track omega3 blood index.

Under fitness, in addition to grip strength, I like to track cardio fitness using a chest strap HRM and a simple test done on a track where I run at a constant HR for about 3 miles and note the decreasing speed of each lap at constant HR. It's helpful to have an HRM that gives average HR for a lap, but you can also just look at it frequently. Comparing the speed/lap for fixed HR line on different days longitudinally gives a picture of cardiovascular efficiency/health.

VO2max estimates are nice to have, but not easy to get and the ones that work you harder and harder have level of effort as a confounder. Some HRMs estimate them from HRV, but not sure if there is much value to that if you are recording HRV too.

Of course, I think HRV is a bad aging biomarker anyway due to how easily short-term issues confound it (temperature, exercise, short-term infectious illness, etc.).

I plan to do CGM vs. point glucose tests within 1-4 years. Latest Dexcom is reportedly very good, and tracking response to each meal and time spent above certain thresholds will be very important. Meantime, testing glucose 2hr post meal I've read is more important than fasting level.

Will be nice when we can have continuous non-squeezing BP like continuous glucose as there is reason to believe it's the spikes that matter not just the levels on calmly taking a reading. But this is probably more years away than common CGM, though Omron has a watch that actually squeezes at the wrist now.

I have it on my list but haven't researched gut permeability / leaky gut testing, but think it's important and within reach currently. I wonder if specific organ function tests are worthwhile for otherwise healthy people doing aging tracking or self-experiments.

Bone scans?

Lastly, CronOMeter is great, but tracking everything you eat with it is hugely time consuming. Much more than everything else discussed in this thread, if you have much of any variation to your diet. Plus it makes eating out or even having friends/relatives cook for you impossible. Dan, I find it surprising that you said 10min/day as your time cost but also said you track all food intake.

Karl