Low carb / time restricted feeding and LDL C and APOB
I have been on ketogenic/time-restricted feeding (18 to 22 hours typically) for about 9 weeks: no processed carbs, very little of low-sugar fruits like kiwi or strawberries, and lots of veggies and fermented food. All biomarkers are improving but LDL C went off the roof: Right before / After: A1C: 5.7 / 5.0 HDL: 71 / 84 LDL: 132 / 194 APO: no before / 134 How did this intermittent fasting. Do you have suggestions on what I could do to change the LDL C and APOB situation? Much thanks!
Thiamine
Hi there, love your podcast and finally joined the member service. Do you routinely test test B1 in your practice? I work as an NP in general neurology and typically do not routinely check it, unless I have an alcoholic or someone with memory, balance, or gait complaints. But after a recent devastating case in the hospital, I am starting to think I might.
Deriving Zone 2 Threshold from VO2 Max Test Results (Anaerobic Threshold)
Yesterday, I had a VO2 Max test done with a Korr Cardiocoach. I'm trying to interpret the results. They provide several metrics, including aerobic threshold and anaerobic threshold. On their website, they describe the calculation as follows: "The anaerobic threshold (AT) is defined as the level of exercise intensity at which lactic acid builds up in the body faster than it can be cleared away. Lactic acid build up generally leads to muscle fatigue and soreness. Vigorous effort can be sustained for an extended duration at exercise intensity levels below the anaerobic threshold. AT can be detected by 2 different means: Ventilatory Threshold, or Respiratory Exchange Ratio threshold. Respiratory Exchange Ratio (RER) is the ratio of expired carbon dioxide to oxygen uptake at the level of the lung. When Carbon dioxide production exceeds oxygen uptake, the RER crosses 1.00. This is anaerobic threshold. Ventilatory Threshold (VT) is the point during progressive exercise in which ventilation increases disproportionately to oxygen uptake. Ventilation increases to rid the body of the excess Carbon dioxide from lactic acid build up. AT is detected by pinpointing the take off (rising) point in the Ve/VO2 ratio. (Meyers, 1996)" From there, they provide a table of the five training zones based on this anaerobic threshold. My question is this: How does that number compare to your working definition of zone 2 (ie lactate below 2 millimoles)? My test data was 177 max HR, 158 anaerobic threshold, zone 2 range of 134 - 148. Using your approximation of 80% of HR max would put me at 141, which is exactly in the middle of their zone 2 range. I plan on purchasing a lactate meter but I am still curious to understand how these respiratory measurements compare both to your approximate and exact methodologies.