Posts tagged caffeine and sleep | XY Files – Veedma's evidence-based men's health articles

The science of caffeine free energy drinks: How to boost focus without the crash

Dr. Jonathan Pierce, PhD: Clinical Psychologist & Neuroscience Specialist

Jan 10, 2026 · 11 min read

For years, “energy” has been synonymous with “stimulation.” But a new wave of non-caffeinated options is changing how men fuel their workdays and workouts. Here is the physiology behind generating power without the jittery debt. “We often confuse agitation with energy. Caffeine borrows energy from your future by blocking sleep signals, but it doesn’t actually ...

Ultrahuman ring vs Oura: which smart ring is worth it for men’s sleep and recovery?

Dr. Bruno Rodriguez, DPT, CSCS: Strength, Recovery, and Physical Therapy Expert

Jan 09, 2026 · 11 min read

Smart rings promise better sleep, better training, and better energy. Here is what “ultrahuman ring vs oura” really means for men, what the data can and cannot tell you, and how to use either ring like a clinician would. “A smart ring can’t diagnose you, but it can help you spot patterns that matter: short ...

Why do i get so hot when i sleep: The science of night sweats and overheating

Dr. Jonathan Pierce, PhD: Clinical Psychologist & Neuroscience Specialist

Dec 05, 2025 · 14 min read

If you keep Googling “why do i get so hot when i sleep” even though your bedroom feels cool, you are not imagining it. Your brain, hormones, muscles, and bedroom setup all play a role — and most of them are fixable. “When men ask me ‘why do i get hot when i sleep?’ I ...

Celsius caffeine vs Red Bull: which energy drink is really better for your body?

Dr. Susan Carter, MD: Endocrinologist & Longevity Expert

Nov 23, 2025 · 14 min read

Celsius and Red Bull promise quick energy, but their caffeine, sugar, and stimulant blends hit a man’s heart, metabolism, and hormones in very different ways. Here is how to choose the lesser risk — or skip both when you should. “When men ask me about Celsius caffeine vs Red Bull, I tell them to think ...

Why do energy drinks make me tired instead of energized?

Dr. Susan Carter, MD: Endocrinologist & Longevity Expert

Nov 21, 2025 · 13 min read

Energy drinks promise quick focus and stamina, yet many people feel strangely sleepy or wiped out once the buzz fades. Here is what the science says about caffeine, sugar, sleep, and stress hormones — and how to get real energy without crashing. “When patients ask me ‘why do energy drinks make me tired,’ we walk ...