Browse the evidence

Asian populations develop obesity-related cardiometabolic morbidities at lower BMI thresholds than white populations, necessitating lower diagnostic cutoffs (BMI ≥25 or 27.5 kg/m²) for accurate risk identification.

If you are of Asian descent, do not rely on the standard BMI of 30 to define obesity. Your risk for diabetes and heart disease increases at lower weights. Use region-specific guidelines (BMI ≥25 or 27.5 kg/m²) or waist circumference measurements to assess your health risk accurately.

Acute endurance exercise stimulates skeletal muscle mitochondrial biogenesis through integrated retrograde signaling from mitochondria to the nucleus, involving the activation of kinases (AMPK, CaMK, MAPK, PKA) and the translocation of transcriptional coactivators like PGC-1α to regulate nuclear gene expression.

To boost your muscle's energy production capacity (mitochondrial biogenesis), engage in endurance exercise. This can be moderate intensity continuous exercise (MICE), high-intensity interval exercise (HIIE), or sprint interval exercise (SIE). The specific intensity determines which fuel sources are used and which signaling pathways are prioritized, but all forms of endurance exercise trigger the necessary retrograde signaling from mitochondria to the nucleus to increase mitochondrial content and function.

Full range of motion (fROM) resistance training yields trivial to small advantages over partial range of motion (pROM) for overall muscle hypertrophy, strength, power, and body composition outcomes.

For most people, full range of motion is the best default for building muscle and strength because it offers a slight edge. However, the difference is small. If you have an injury that hurts at full depth, partial range of motion is still highly effective and better than nothing. If you are a powerlifter or sport-specific athlete, train the specific partial ranges relevant to your sport, as strength gains are specific to the angle trained.

High-volume resistance training increases non-myofibrillar protein synthesis rates more than high-load resistance training, suggesting a mechanism for sarcoplasmic hypertrophy.

High-volume training may promote muscle growth through increased non-myofibrillar protein synthesis, which contributes to sarcoplasmic hypertrophy. This suggests that volume-based protocols can drive muscle growth through mechanisms beyond just contractile protein accretion.

In young and middle-aged adults (18-55 years), the combination of obesity, diabetes, and hypertension increases the risk of COVID-19-related mortality to levels comparable to those observed in older adults (56-75 years) without these conditions.

If you are under 55, your age alone does not protect you from severe COVID-19 outcomes if you have obesity, diabetes, or high blood pressure. These conditions combine to elevate your mortality risk to that of an older adult. Prioritize managing these metabolic factors through lifestyle changes and medical care, and ensure you are prioritized for preventive measures like vaccination.

White common bean extract (WCBE) rich in alpha-amylase inhibitor, taken 1.5g before meals, significantly improves glycemic control (HbA1c) and ameliorates diabetic peripheral neuropathy in type 2 diabetes patients over 4 months by remodeling gut microbiota to enrich SCFA-producing bacteria.

If you have Type 2 Diabetes, taking 1.5 grams of white common bean extract half an hour before each meal may help lower your HbA1c and improve nerve health. This supplement works by blocking starch digestion and feeding beneficial gut bacteria that produce short-chain fatty acids, which help regulate blood sugar. It should be used alongside your prescribed medication and dietary guidance, not as a replacement.

Resistance training in hypoxia (RTH) yields similar muscle hypertrophy and strength gains compared to normoxia when protocols are not optimized for specific covariates.

If you are training in hypoxia, do not expect automatic superior gains in muscle size or strength compared to training in normal air. The overall benefit is negligible unless you specifically optimize your rest intervals and load.

Resistance training in hypoxia enhances strength development (1RM) when using long inter-set rest intervals (≥ 120s) and moderate loads.

To gain strength in hypoxia, use moderate weights and rest for at least 2 minutes between sets. This allows you to maintain the intensity needed for strength adaptations, which hypoxia may support better than normoxia under these specific conditions.

Using a single, universal velocity loss (VL) threshold to prescribe resistance training volume is unreliable and likely leads to variable acute physiological responses and divergent long-term adaptations because the volume of work completed at a given VL threshold varies significantly between individuals.

Do not use a single velocity loss threshold (like 20% or 30%) for everyone in your gym or program. The amount of work you do to hit that speed drop varies wildly between men and women, and between strong and less strong individuals. To ensure consistent training effects, you must individualize velocity loss targets based on sex, training status, and personality traits like emotional stability.

Sex significantly influences the volume of work completed at velocity loss thresholds, with females completing more repetitions than males at the same VL thresholds, while males perform repetitions at higher velocities.

If you are programming for mixed-sex groups, do not assume a 20% velocity loss means the same workload for men and women. Women will likely perform more repetitions to hit that speed drop, while men will maintain higher bar speeds. Adjust your targets or volume expectations based on sex.

Adherence to the Mediterranean diet (MeDi) is associated with improved cognitive performance and a delay in cognitive decline in elderly populations, particularly when enriched with extra virgin olive oil or nuts.

Adopt a Mediterranean-style eating pattern focusing on extra virgin olive oil, vegetables, fruits, whole grains, and nuts. This approach is more effective for cognitive health than taking single supplements. Prioritize high-polyphenol olive oil and moderate wine intake if appropriate for your health profile.

Plant-based diets, particularly those emphasizing nutritious plant foods, are associated with a reduced risk of cognitive impairment and dementia compared to non-vegetarian diets.

Shift your diet to center around plants: vegetables, fruits, whole grains, legumes, nuts, and seeds. This pattern is linked to a significantly lower risk of dementia. Ensure you are eating 'nutritious' plant foods, as less healthy plant-based patterns may not offer the same benefits.

Bariatric surgery significantly reduces the incidence of new-onset type 2 diabetes, hypertension, and dyslipidemia in severely obese individuals compared to no intervention.

For severely obese individuals, bariatric surgery is a highly effective preventive measure against developing type 2 diabetes, high blood pressure, and high cholesterol. The study shows that surgery reduces the risk of developing these conditions by 55-94% compared to no treatment. This should be a key factor in treatment decisions for severe obesity, especially in regions with high metabolic disease rates.

Physical activity attenuates the obesity-increasing genetic effects associated with the FTO locus by approximately 20-30%.

If you have a family history of obesity linked to the FTO gene, regular physical activity is not just beneficial—it is a critical counter-measure. Engaging in regular exercise can reduce the genetic impact on your BMI by 20-30%, proving that lifestyle choices actively modify genetic risk.

FTO gene variants interact with sweet beverage consumption and alcohol intake to influence obesity and blood pressure.

If you have the FTO gene variant, be particularly mindful of your intake of sweet beverages and alcohol, as these interact with your genetics to increase obesity and blood pressure risk.

Lifestyle-mediated weight loss interventions (diet and/or exercise) induce significant DNA methylation changes in blood leukocytes and adipose tissue, potentially serving as biomarkers for predicting individual response to therapy and reflecting systemic metabolic improvements.

Lifestyle changes like diet and exercise don't just change your weight; they change how your genes are expressed. This means your body's biological response to weight loss is unique and can potentially be predicted by looking at specific DNA markers before you start. Consistent lifestyle interventions can reverse obesity-associated epigenetic patterns.

Baseline DNA methylation levels can serve as prognostic biomarkers to predict which individuals will successfully lose weight in response to lifestyle interventions.

Your body's current epigenetic state might tell you how well you'll respond to a specific diet or exercise plan before you even start. This suggests a future where weight loss strategies are tailored based on your unique biological markers rather than just your current weight.

Elevated liver disease activity, measured by MRI-derived iron-corrected T1 (cT1), is independently associated with a higher risk of major cardiovascular events, atrial fibrillation, heart failure, CVD hospitalization, and all-cause mortality.

If you have elevated liver disease activity (measured by MRI cT1), your risk for heart failure, atrial fibrillation, and other cardiovascular events is significantly higher, independent of your liver fat or standard blood tests. This suggests that assessing liver health via advanced imaging may be crucial for cardiovascular risk stratification, even in those without metabolic syndrome.

In strength-trained individuals, resistance training frequency (1x vs 3x per week) produces equivalent maximal strength (1RM) and muscle hypertrophy (CSA) gains when total training volume is equalized.

If you are an experienced lifter, you do not need to train a muscle group three times a week to get bigger or stronger. You can train it once a week, provided you perform the same total amount of work (volume) and intensity. Focus on getting your sets in during that single session rather than spreading them out for frequency's sake.

Training to muscular failure elongates recovery time courses and increases fatigue perception compared to non-failure training, potentially impairing subsequent performance if insufficient recovery time is allowed between sessions.

Avoid training to failure on exercises scheduled before high-priority sessions (like heavy singles or technical lifts). Reserve failure training for isolation movements, the last set of a session, or when you have ample recovery time (48+ hours) before training the same muscle group again. This preserves performance for important lifts.

Exercise selection significantly impacts recovery time, with lower body, multi-joint, eccentric-heavy, and lengthened-position exercises requiring longer recovery periods (48-72 hours) compared to upper body or isolation movements.

Schedule lower body, multi-joint, or eccentric-heavy exercises (like squats, deadlifts, or lengthened partials) with at least 48 hours of rest before training the same muscle groups again. Use upper body or isolation exercises for more frequent training sessions.

High-intensity interval training (HIIT) engages a unique subset of skeletal muscle signaling networks compared to work-matched moderate-intensity continuous training (MICT), specifically involving kinases and pathways associated with plasma lactate levels.

If you are healthy and untrained, HIIT can trigger unique muscle signaling pathways linked to metabolic health (like lactate response) that moderate continuous training does not, even when the total work done is the same. This suggests HIIT is a potent tool for metabolic adaptation.

In individuals with Type 2 Diabetes, the 'obesity paradox' exists where the lowest mortality risk is observed in the BMI range of 25–35 kg/m2, but this is largely explained by higher cardiorespiratory fitness (CRF) rather than body weight itself.

Do not fear being overweight if you are fit. In Type 2 Diabetes, the lowest mortality risk is found in those with a BMI of 25-35, but this is because they tend to be more fit. Focus on building fitness. An obese person with high fitness has lower mortality risk than a normal-weight person with low fitness.

Inter-set rest intervals greater than 60 seconds provide a small but detectable hypertrophic benefit for upper and lower limb muscles compared to shorter rest intervals, primarily by preserving volume load.

If your goal is maximum muscle growth, rest 2-3 minutes between sets. While resting less than 60 seconds still works, resting longer allows you to maintain more weight and reps (volume load), leading to slightly better growth, especially in arms and legs. There is no extra benefit to resting longer than 90 seconds.