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Main bloodwork metrics and biological age

What should a person check during bloodwork? Would be great to have a list of elements that are makes sense to check every year. What are the metrics that the most influence aging and biological age? Is there any data on how to improve them?

Intermittent random rewards for multiple goals

What is your approach to intermittent random rewards, for example the coin flip example you provided for more goals per week? Why is it best to do the rewarding process one time weekly for one goal or multiple times during the week or maybe multiple times weekly for each goal?

Is it good to use stimulants as short-term reinforcement when establishing habits?

Say I want to establish a habit of going to the gym right after waking up every day. Is it worth taking stimulants (such as preworkout) in order to reinforce that behavior, say every day for the first 30 days?

Compression socks and tights

What does the scientific literature say about compression socks and tights? Can they really boost athletic performance and recovery time? Are they indeed helpful for circulation. Can they be helpful for people with varicose or spider veins?

Exercise benefits are damped by cold exposure, but what if combined with sauna?

You have spoken to great length about avoiding cold exposure after exercise to harvest the adaptation benefits. I fail to remember if you have spoken about how these exercise adaptions are amplified/damped in context to the combination of cold exposure AND sauna. From what you've said about sauna alone, I would always assume that going to sauna after exercise can only speed up the recovery (not sure if it amplifies the degree of physical/neural adaptation) PS: I am not sure if you truly appreciate how much good you do in this world for mental health