How I eliminated GERD: - Walking after every meal - Reducing my body weight - Avoiding food in the hours before bed YMMV
~10lbs (5% of bodyweight) is the difference between GERD and no gerd for me.
Part of it I assume is increase in viceral fat pressuring stomach. After my threshold weight of 190lbs I have to move up a notch on my lifting belt.
> Avoiding food in the hours before bed
I think another factor is higher BW = more calories = more time for digestion. If I shift meals to 8 hours before bedtime vs 5 hours, GERD also goes away because I have more time to digest.
I also don't get GERD after squat and deadlift days because they reliably make me shit. As an infrequent shitter, GERD is also correlated to how backed up I am.
TLDR is to keep your stomach empty / digestion done before bedtime.