I have been analyzing my biometric data over the last quarter, specifically looking at the delta between my REM and deep sleep cycles. While temperature regulation via systems like the Eight Sleep Pod has provided a consistent baseline, I am looking for community recommendations on more granular interventions. Has anyone here experimented with specific magnesium threonate dosages versus bisglycinate, and if so, what was the impact on your sleep latency? Additionally, for those focusing on "lifestyle design" through cognitive performance, have you found that integrating a specific meditation protocol (like the 10-minute Henry Shukman Zen method) provides a statistically significant improvement in heart rate variability (HRV) compared to standard box breathing? I am looking for data-backed suggestions that move beyond the basic "no screens before bed" advice