Muscle is one of the most powerful and most underestimated predictors of long-term health. Beyond appearance or athletic performance, skeletal muscle plays a direct role in metabolic function, insulin sensitivity, cardiovascular health, cognitive protection, and lifespan. This playlist covers the science of muscle mass and strength — how they decline with age, why that decline matters clinically, and the evidence-based strategies for building and preserving them throughout life. Topics include resistance training, VO2 max, zone 2 cardio, visceral fat, body composition, and the physiological relationship between physical fitness and longevity.
Curated by: Doctor Alex (51 videos)
There is a type of fat that you cannot see, cannot pinch, and cannot measure properly on a bathroom scale.... and it may be one of the biggest hidden drivers of heart disease, type 2 diabetes, fatty liver disease and even dementia. It is called VISCERAL FAT. Unlike the fat under your skin, visceral fat is stored deep inside the abdomen, wrapped around the liver, intestines and other organs. And biologically, it behaves completely differently. It acts less like passive energy storage and more like an inflammatory organ, continuously releasing fatty acids, hormones and inflammatory signals directly into the liver through the portal vein. In this video, I break down: -What visceral fat actually is -Why BMI can completely miss it -Why slim people can still carry dangerous levels of it -The link between visceral fat and insulin resistance -How it drives heart disease, fatty liver and dementia -Why poor sleep and chronic stress specifically increase abdominal fat -The role of cortisol, inflammation and the liver -Why muscle mass protects against metabolic disease -What waist-to-height ratio tells you about your health -The evidence behind exercise, diet and fasting for reducing visceral fat One of the most important things to understand is that visceral fat is highly responsive to change. The same metabolic activity that makes it dangerous also makes it one of the first fat stores the body draws on when sleep improves, movement increases, insulin levels fall, and the metabolic environment changes. So please feel encouraged by this video!! TIMESTAMPS 00:00 Introduction 02:52 What is visceral fat — and why is it so different? 07:11 What visceral fat actually looks like inside the body 10:58 High versus low visceral fat in real people 14:41 Why visceral fat goes straight to the liver 21:17 The chain to heart disease, diabetes and dementia 27:33 What causes visceral fat accumulation 33:43 What actually reduces visceral fat 43:19 Closing thoughts REFERENCES Body fat distribution, incident cardiovascular disease, cancer, and all-cause mortality (Framingham Heart Study) https://pubmed.ncbi.nlm.nih.gov/23850922/ Visceral and ectopic fat, atherosclerosis, and cardiometabolic disease: a position statement https://pubmed.ncbi.nlm.nih.gov/31301983/ Pathophysiology of human visceral obesity: an update https://pubmed.ncbi.nlm.nih.gov/23303913/ A dose-response relation between aerobic exercise and visceral fat reduction: systematic review of clinical trials https://pubmed.ncbi.nlm.nih.gov/17637702/ Impact of sleep debt on metabolic and endocrine function https://pubmed.ncbi.nlm.nih.gov/10543671/ Central obesity and increased risk of dementia more than three decades later https://pubmed.ncbi.nlm.nih.gov/18367704/ Type 2 diabetes mellitus and psychological stress — a modifiable risk factor https://pubmed.ncbi.nlm.nih.gov/28664919/ Understanding weight gain at menopause https://pubmed.ncbi.nlm.nih.gov/22978257/ Evidence for resistance training as a treatment therapy in obesity https://pubmed.ncbi.nlm.nih.gov/20847892/ A systematic review of waist-to-height ratio as a screening tool for the prediction of cardiovascular disease and diabetes: 0.5 could be a suitable global boundary value https://pubmed.ncbi.nlm.nih.gov/20819243/ Association of alcohol consumption with fat deposition: the Shiga Epidemiological Study of Subclinical Atherosclerosis (SESSA) https://pubmed.ncbi.nlm.nih.gov/29848904/ Obesity and the risk of myocardial infarction in 27,000 participants from 52 countries: the INTERHEART case-control study https://pubmed.ncbi.nlm.nih.gov/16271645/ Disclaimer: This video is for educational purposes only and should not replace personalised medical advice from your own doctor or healthcare professional. #visceralfat #insulinresistance #heartdisease #fattyliver #metabolichealth #longevity #type2diabetes #dementia #preventativemedicine #dralex #doctoralex