Fitness Tracker Sleep Cycle Accuracy
Hello Dr. Huberman, you mentioned in the podcast with Dr. Layne Norton that fitness trackers (all the usual brands that we won't mention) are not accurate in counting calories expended. My fitness tracker tracks my sleep cycles but I was wondering if it is actually accurate. It gives me info on sleep cycles, sleep efficiency (time asleep/time in bed), and overall quality of sleep. Are standard popularized fitness trackers accurate in giving me this information? Thanks, Spencer
Minimum effective dose HIIT
How much HIIT has to be done to achieve the benefits? I have moved to doing more Zone 2 training (thanks to you and Dr. Peter Attia). Is it enough to do 3 x 10 min sessions of HIIT at the end of my zone 2 workouts? For example 60-90 min zone 2 followed by 10 min HIIT such as 2 blocks of tabata? Thanks!!
Can too much coffee lead to dementia?
The abstract for the study, "High coffee consumption, brain volume and risk of dementia and stroke" ( https://pubmed.ncbi.nlm.nih.gov/34165394/ ), states "High coffee consumption was associated with smaller total brain volumes and increased odds of dementia." Alarmingly, it says "53% higher odds of dementia" for 6 cups vs 2 (with no definition of cup size). As someone with a ~32 oz/day habit, should I take this seriously?
Best practices if you choose to drink Alcohol
Episode #86 made me rethink my usage of alcohol. I went from being a moderate drinker of 8 drinks a week to an infrequent drinker...about 3 drinks a month. I am trying to decide exactly how much I want to consume alcohol based on the damage a drink causes to my gut and brain and the time to recover. is 1-2 drinks a week, 2 weeks or month low risk? Distilled vs fermented? Are diluted drinks such as a gin and tonic less harmful compared to my favorite Gin martini? Should I drink or eat anything particular before, during or after consuming alcohol to protect my gut? Thanks for getting me on this path. I just retired and was planning to have cocktail at 4pm everyday so the information put me on a much healthier path :)