Testing for food sensitivities
I hear so much about the role of inflammation in health and longevity. The functional medicine docs rely on food sensitivity tests that supposedly tell you which foods may be a problem for you and that might be causing inflammation. But I wonder, is there good science behind these tests?
Zone 2 and Heart rate
Hi Peter, I've been doing a decent amount zone 2 training and am interested in continuing with this as a mainstay of my exercise given the benefits. I do mine mostly on a treadmill or on outdoor runs and just watch my HR trying to keep it around 145-155 (I'm a 40 year old male). I listened to your zone2 instagram video and loved it. I was specifically piqued by how you said you can do your zone 2 at around 10bpm faster than the MAF prediction given your age and you still will stay at a lactate of 2mmol. Anyway, to the question: If you could conceivably control for other factors that would cause your HR to drift up (temperature and hydration status) during a workout assuming your output is staying the same, wouldn't it be possible to use the fact one's HR has stayed steady and not drifted higher and higher during a workout to ascertain that you are clearing lactate as you make it and are in fact still in your zone 2? Sorry thats not the clearest question but I'm basically trying to prove I'm in zone 2 despite the fact that I don't have a lactate meter. I have been training consistently for over a year doing HIIT/interval runs/etc and in the last 6 months doing dedicated zone 2 training using MAF's 180-age formula as a guide but often feel like I can go a little faster and maintain, and I can keep my HR consistently around 150 for 45 min or so (10bpm faster than MAF formula dictates).
Berberine on CGM
I wondered if Peter had done any self testing to see if Berberine had any affect on blood glucose measured via CGM. I just started taking 1500 mg per day and believe I've noticed differences in afternoon energy levels and appetite. I'd do the tests on myself only CGM kit is still very difficult and expensive to obtain in the UK.