Fitness.
Strength, cardio, mobility, and recovery — training guidance built on exercise science for every experience level.
Zone 2 Cardio: The Low-Intensity Training Behind the Longevity Hype
Zone 2 cardio promises better mitochondria and fat burning. Here is what the latest evidence actually supports, and how to train it right.
Photograph · HL BenefitsThe latest, in long form.
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Rucking: What Weighted Walking Does for Your Body
Rucking adds weight to a walk you already take. Here is what the evidence says about calories, bones, posture, and starting without getting hurt.
Creatine for Women: Muscle, Brain, Bone, and Menopause Benefits
FitnessGLP-1 Exercise Programming: The Optimal Workout Plan While on Ozempic or Mounjaro
FitnessRecovery Peptides: How TB-500 Cut Tennis Elbow Healing Time in Half
The Pre-Workout Peptide Trend No One in the Supplement Industry Saw Coming
A Dublin AI startup, an FDA GRAS notification, and three RCTs are quietly disrupting the $19.58B pre-workout supplement category.
Peptides for Endurance Athletes: What Marathoners Are Quietly Adding to Their Stack
Recreational marathoners are quietly adding peptides to their training stack. Almost every compound on that list is on the WADA Prohibited List. Here is what the human evidence actually says.
MK-677 (Ibutamoren): The Oral Growth Hormone Promise — Real or Hyped?
MK-677 raises growth hormone and IGF-1 like the marketing promises. Across 30 years and six clinical-trial indications, none of those biomarker wins translated into the outcomes humans actually…
Companion sections.
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A companion section to fitness, with its own evidence-led reading list.
Food & Nutrition
A companion section to fitness, with its own evidence-led reading list.
Weight Loss
A companion section to fitness, with its own evidence-led reading list.
Definitive guides.
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IGF-1 LR3: The Most Powerful Muscle Peptide — and Why It's Also the Riskiest
Hexarelin vs. Ipamorelin: Which Growth-Hormone Peptide Wins for Lean Muscle?
Hexarelin hits harder; Ipamorelin holds steadier. The lean-mass evidence in healthy adults is thinner than either side admits.
On our desk this week.
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The 7 Muscle-Building Peptides Bodybuilders Use (and 3 They Quietly Avoid)
A safety-first guide to seven muscle-building peptides bodybuilders discuss, the evidence behind them, and three high-risk compounds to avoid.
Weighted Vest Walking and Hiking: Calorie Burn, Bone Density, and Beginner Guide
Research shows weighted vest walking burns more calories proportional to load and may help maintain bone density -- but only during structured exercise, not passive wear.
Quick reads.
All 39 →Padel: The Fastest-Growing Racquet Sport and Its Health Benefits
With 35 million players worldwide and courts spreading across 150 countries, padel…
Cozy Cardio: The Low-Intensity Home Workout Trend That Actually Works
Cozy cardio pairs gentle movement with candles and comfort shows. Research shows…
Community Fitness: Pickleball Leagues, Running Clubs, and the Social Exercise Movement
Group exercisers log 58% more physical activity than solo exercisers. The science behind…
12-3-30 Workout: Incline Walking for Weight Loss and Cardiovascular Health
Two studies confirm the 12-3-30 workout burns 220 calories per session and draws 41% of…
Zone 0 Training: The Anti-Burnout Workout Philosophy of 2026
Zone 0 training uses sub-50% heart rate movement for parasympathetic recovery. The…
Rucking for Beginners: How Weighted Walking Builds Strength and Burns 3x the Calories
Military-inspired weighted walking burns 120-158 calories per mile, comparable to…
Japanese Walking (Interval Walking Training): The 30-Minute Workout Backed by Shinshu University
Japanese interval walking alternates 3-min fast and slow intervals for 30 minutes.…
VO2 Max: What It Measures, Why It Predicts Longevity, and How to Improve It
How VO2 max predicts lifespan better than almost any other health metric, and the…
From the archive.
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Citrulline Malate: Workout Performance, Dosage, and Recovery
Cordyceps Mushroom for Energy, Stamina, and Athletic Performance
Walking 10,000 Steps — Myth or Science? How Much You Really Need
Resistance Training for Women Over 40: Bone Density, Metabolism, and Hormones
Contrast Therapy: Sauna Plus Cold Plunge for Recovery
Contrast therapy alternates sauna heat and cold water immersion to boost blood flow, reduce soreness, and trigger neurochemical changes that aid recovery.
Desk-Job Back Pain: Posture Fixes and Exercises That Actually Work
Evidence-based micro-breaks, seated exercises, and ergonomic strategies to reduce desk-job back pain and protect your spine.
Kegel Exercises for Men: What the Research Actually Shows
Clinical evidence shows pelvic floor training can reverse erectile dysfunction, delay ejaculation, and restore urinary control after prostate surgery.
Fitness and Pain Management: What Clinical Research Actually Shows
What clinical science says about calf strength, thigh circumference, sciatica relief through nerve flossing, and the real cause of desk-job pain.
Zone 2 Cardio for Fat Burning and Longevity
Zone 2 cardio at 60-70% max heart rate is the sweet spot for fat burning and longevity, backed by research on mitochondrial health and mortality risk.
