Iris Feldman
Sleep, stress, and healthy-aging habits
Boston, MA
Iris Feldman is a health journalist writing Health Habits' sleep, mental-wellbeing, and healthy-aging coverage. She translates sleep and behavioral science into calm, practical habits, and is careful about the line between everyday wellbeing and clinical concerns.
What Iris covers
- Evidence-based sleep habits
- Everyday stress and mood
- Focus and routine
- Healthy-aging basics
- When to seek professional care
Articles by Iris
-
How to Reduce Screen Time Before Bed (and Why It Works)
Learn the science-backed timing for reducing screen time before bed, why blue light matters, and how to build an evening wind-down routine that actually works.
-
How to Fix Your Sleep Schedule: A Science-Based Reset Guide
Reset your circadian rhythm with light exposure timing, realistic schedules, and evidence-based protocols. Includes timelines for jet lag and night shift recovery.
-
Magnesium for Sleep and Muscle Tension: What the Evidence Shows
Magnesium plays a role in muscle relaxation and sleep regulation, but the evidence for supplementation is mixed. Here's what works and what's uncertain.
-
Sedentary Time and Cardiovascular Health: What the Evidence Shows
Sedentary time and cardiovascular health are linked by clear thresholds. Learn how much sitting raises risk, why 2-minute breaks work, and what NEAT means for your heart.
-
Cold Water Exposure and Metabolism: What the Science Shows
Cold water exposure increases metabolic rate acutely, but the effect is brief. Chronic exposure can expand brown fat tissue, yet the real-world impact on daily calorie
-
Vitamin D Deficiency and Mood: What the Evidence Shows
Vitamin D deficiency and mood are linked in research, but does supplementation help depression or SAD? Here's what the evidence actually shows.
-
How to Recover from Eye Strain from Screens
Evidence-based recovery from digital eye fatigue: why the 20-20-20 rule works, how long symptoms last, and when screen discomfort needs medical attention.
-
Alcohol and Cardiovascular Health: What the Evidence Shows
Recent studies challenge the idea that moderate alcohol protects your heart. Here's what current evidence shows about alcohol consumption limits and cardiovascular risk.
-
Electrolytes and Hydration Explained: What Actually Matters
Electrolytes control how water moves into your cells. Learn when you need them, the science of sodium and potassium in hydration, and when water alone falls short.
-
How Posture Affects Chronic Pain: What Science Actually Shows
Posture contributes to chronic pain, but not the way most people think. Movement variability and strength matter more than perfect alignment.
-
How to Build Better Sleep Habits: A Science-Based Guide
Learn how to build better sleep habits with a phased, evidence-based approach. Covers sleep timing, bedroom environment, and wind-down routines that stick.
-
Protein Timing for Muscle Recovery: What Actually Works
Learn when to eat protein after workouts for optimal muscle recovery. Evidence-based timing windows, daily targets, and when precision actually matters.
-
Recovering From Chronic Sleep Debt: What Science Says
Recovering from chronic sleep debt takes 2-4 weeks of consistent sleep, not a weekend. Learn why partial recovery is realistic and what the science actually shows.
-
Cold Water Immersion Benefits and Risks: What the Evidence Shows
Cold water immersion may reduce muscle soreness modestly, but carries cardiovascular risks and can impair strength gains. Here's what the research actually shows.
-
Magnesium for Muscle Cramps and Recovery: What the Evidence Shows
Does magnesium help muscle cramps and recovery? The answer depends on whether you're deficient. Learn when supplementation helps and when it doesn't.
-
Inflammation and Diet: What Actually Works
Evidence-based guide to inflammation and diet: which foods lower inflammatory markers, what the research actually shows, and when diet matters for chronic inflammation.
-
Does Magnesium Supplementation Help Sleep? What Research Shows
Magnesium for sleep shows modest evidence in older adults and those with low intake, but results are inconsistent in healthy sleepers. Here's what the research actually
-
Does Sugar Really Cause Inflammation? What the Evidence Shows
Does sugar cause inflammation? Research shows added sugars raise inflammatory markers like CRP, but whole fruit sugar doesn't—here's why.
-
How Often Should You Actually Stretch?
Evidence-based stretching frequency: 2-3 focused sessions per week build flexibility. Learn when to use static vs. dynamic stretching and how often you need it.
-
How Sodium Intake Affects Your Heart Health
Sodium intake and heart health are closely linked through blood pressure, arterial stiffness, and cardiovascular risk. Learn the daily limits backed by science.
-
Does Blue Light from Screens Hurt Sleep?
Does blue light from screens hurt sleep? The mechanism is real, but brightness, timing, and what you're doing on screens matter more than wavelength alone.
-
Does Meal Timing Affect Digestion and Sleep?
Evidence shows meal composition matters more than timing for digestion, but eating close to bedtime can disrupt sleep through acid reflux in sensitive individuals.
-
Collagen Supplements for Joint Health: What Works in 2026
Evidence-based comparison of marine collagen vs bovine for joints. What the clinical trials show, which type absorbs best, and who benefits most from supplementation.
-
Omega-3 Foods for Brain Health: What the Evidence Shows
Which omega-3 foods support brain health? Learn what DHA and EPA do, which foods deliver them best, and whether supplements match whole-food sources.
-
Are Sleep Trackers Accurate? What the Science Says
Sleep trackers are better than guessing but worse than a sleep lab. Here's what they actually measure, what they miss, and how to use them wisely.
-
Evidence-Based Ways to Reduce Stress: 6 Science-Backed Techniques
Learn six science-backed stress management techniques—sleep, exercise, breathing, connection, meditation, and therapy—shown in randomized trials to lower cortisol and
-
Habits That Support Healthy Aging: Evidence-Based Longevity Practices
Research-backed habits linked to healthier aging: exercise, Mediterranean diet, sleep, social connection, and stress management. Learn what actually helps you age well.
-
How Much Sleep Do You Actually Need? The Science Behind Sleep Requirements
Most adults need 7–9 hours of sleep, but individual needs vary. Learn what the research says about sleep requirements by age and the real cost of chronic short sleep.
-
How to Fall Asleep Faster: 6 Science-Backed Techniques That Work
Learn how to fall asleep faster using evidence-based techniques from sleep science. Align your body clock, calm a racing mind, and retrain your sleep associations in 6