within-person variability – BIOENGINEER.ORG https://bioengineer.org Bioengineering Sat, 17 Oct 2026 11:44:24 +0000 en-US hourly 1 https://wordpress.org/?v=7.1.3 https://bioengineer.org/wp-content/uploads/2019/09/cropped-bioengineering-32x32.png within-person variability – BIOENGINEER.ORG https://bioengineer.org 32 32 72741379 Momentary Stress Speeds Up the Aging Brain—But Only for a While, Smartphone Study Finds https://bioengineer.org/momentary-stress-speeds-up-the-aging-brain-but-only-for-a-while-smartphone-study-finds/ Sat, 17 Oct 2026 11:44:24 +0000 https://bioengineer.org/?p=426515 426515