Browse the evidence

Resistance exercise combined with a protein intake of 1 to 1.5 g/kg/day is the primary management strategy for sarcopenia.

To fight age-related muscle loss, you must do resistance training and eat 1 to 1.5 grams of protein per kilogram of body weight every day. Don't rely on vitamin D or steroids as primary treatments, as evidence for their benefit in sarcopenia is lacking.

Low-volume high-intensity interval training (HIT) using constant-load intervals significantly increases skeletal muscle mitochondrial capacity and improves exercise performance in healthy adults.

Perform 6-8 minutes of actual work per session, three times a week. Cycle at a high but sustainable effort (around 100% of your max power from a fitness test) for 60 seconds, followed by 75 seconds of slow pedaling. Repeat this 8 to 12 times per session. This short, structured approach significantly boosts your muscle's energy production and endurance without requiring extreme exhaustion.

Increasing weekly resistance training volume (total sets per muscle group) produces a graded, dose-response increase in muscle hypertrophy, with higher volumes yielding greater gains than lower volumes.

To maximize muscle growth, you should aim for higher weekly training volumes. Specifically, performing 10 or more sets per muscle group per week yields significantly greater hypertrophy than performing fewer than 5 sets. Each additional set provides a small but consistent benefit, so prioritizing volume (within reason and recovery capacity) is a key lever for muscle gain.

A 13-week intervention of a vitamin D and leucine-enriched whey protein nutritional supplement significantly increases appendicular muscle mass and improves lower-extremity function (chair-stand time) in sarcopenic older adults, independent of exercise.

For older adults with sarcopenia who cannot or do not exercise, consuming a specific nutritional supplement twice daily (containing whey protein, leucine, and vitamin D) for 13 weeks can significantly increase muscle mass and improve leg strength (measured by chair-stand time). This offers a practical, non-exercise-based strategy to maintain mobility and independence.

Engaging in total physical activity of at least 4200 kJ/wk (approx. 1000 kcal/wk) reduces the risk of coronary heart disease by approximately 20% in middle-aged and older men, with the strongest risk reductions associated with vigorous-intensity activities.

To significantly lower your risk of heart disease, aim to burn at least 1,000 calories per week through physical activity. You don't need to run marathons; brisk walking, swimming, or yard work for about 30 minutes a day, most days of the week, is sufficient. If you can incorporate more vigorous sports, the benefit is even greater, but moderate activity alone is highly effective.

Physical activity reduces coronary heart disease risk even in men with multiple existing coronary risk factors (such as smoking, hypertension, diabetes, or high BMI).

Even if you have high blood pressure, diabetes, or other risk factors, staying physically active (at least 1,000 calories worth of activity per week) significantly lowers your heart disease risk compared to being inactive. Exercise helps counteract the negative effects of these other risk factors.

Sleeping less than six hours per night increases all-cause mortality risk by 13% compared to sleeping seven to nine hours, while sleeping six to seven hours increases risk by 7%.

Aim for 7-9 hours of sleep nightly. Sleeping less than 6 hours significantly raises your risk of death from all causes, and 6-7 hours also carries increased risk. Prioritize consistent sleep duration to protect long-term health.

Insufficient sleep (less than 6 hours) reduces workplace productivity by increasing absenteeism and presenteeism, resulting in approximately 6 lost working days per year compared to those sleeping 7-9 hours.

Prioritize 7-9 hours of sleep to maximize work productivity. Sleeping less than 6 hours costs you approximately 6 working days per year in lost time due to being sick or less effective at work.

Interventions using presumed healthy diets result in reductions of almost all investigated inflammatory biomarkers.

Adopting a healthy diet, as defined by a priori scores like the Mediterranean Diet Score or Healthy Eating Index, has been shown in intervention studies to reduce inflammatory biomarkers. This suggests that dietary changes can directly lower inflammation.

Resistance training improves muscular strength, endurance, body composition, and glucose tolerance in individuals with type 2 diabetes, and should be included at least 2 days per week.

Add resistance training to your routine at least two days a week. Perform 8-10 exercises targeting major muscle groups, doing one set of 10-15 repetitions until you are near fatigue. This improves muscle strength, body composition, and glucose tolerance. If you have eye or heart complications, consult your doctor and modify the intensity (e.g., avoid heavy straining or holding your breath).

Weight loss, achieved through either bariatric surgery or behavioral diet/exercise programs, significantly reduces chronic pain intensity and disability in obese individuals.

If you are obese and have chronic pain, losing weight is one of the most effective ways to reduce your pain. This can be done through surgery or diet/exercise programs. While surgery often leads to greater pain relief, behavioral programs also help. The hardest part is keeping the weight off, so focus on building sustainable habits for eating and moving.

Increasing dietary protein to 20-30% of energy intake (relative high-protein diet) increases satiety and energy expenditure, thereby facilitating weight loss and maintenance without adverse effects on bone health in healthy adults.

To lose weight or maintain loss, aim for 20-30% of your daily calories from protein. This isn't just about building muscle; it keeps you fuller longer and burns slightly more calories through digestion. You don't need to fear bone loss; this level of protein is safe for healthy adults and may actually protect bones. Focus on getting enough total protein rather than obsessing over 'complete' vs 'incomplete' sources, though varying sources is beneficial.

Incorporating walnuts (providing ~15% of energy) into a reduced-energy diet yields weight loss comparable to a standard reduced-energy-density diet while providing superior improvements in LDL cholesterol and systolic blood pressure.

To lose weight and improve heart health markers, you can include walnuts in your diet. Aim for about 1.5 ounces (42 grams) daily if you are eating more than 1500 calories, or 1 ounce (28 grams) if eating less. This amount provides about 15% of your daily calories. This approach helps you lose weight just as effectively as a standard low-calorie diet, but it may also lower your bad cholesterol (LDL) and blood pressure more effectively. Ensure you are still in a caloric deficit and staying active.

Roux-en-Y gastric bypass (RYGB) surgery provides superior long-term weight loss maintenance and significantly higher rates of diabetes remission compared to non-surgical controls in severely obese patients over a 6-year period.

For severely obese individuals (BMI >= 35) who have not achieved lasting weight loss through lifestyle changes, Roux-en-Y gastric bypass surgery offers a clinically proven path to significant, long-term weight loss (average 27.7% at 6 years) and high rates of type 2 diabetes remission (62%), far exceeding the outcomes of non-surgical management.

Dietary fiber, specifically soluble gel-forming fiber, lowers blood cholesterol and reduces cardiovascular disease risk, and when added to statin therapy, doubles the efficacy of statins.

To support heart health and cholesterol levels, aim for the recommended daily fiber intake: 38 grams for men and 25 grams for women (ages 19-50). Prioritize soluble, gel-forming fibers found in oats, barley, beans, and fruits, as these are most effective at lowering cholesterol. If you are on statins, adding fiber may help them work better and potentially allow for lower doses, but consult your doctor before making changes.

Exercise-based cardiac rehabilitation significantly reduces cardiovascular mortality and hospital admissions in patients with coronary heart disease compared to usual care without exercise.

If you have coronary heart disease, participating in a structured exercise-based cardiac rehabilitation program is a Class I recommended treatment that significantly lowers your risk of dying from heart causes and being hospitalized. It is safe, even for high-risk patients, and benefits include improved quality of life. Seek out a program, preferably supervised, as soon as possible after your cardiac event.

Front squats produce significantly lower maximal joint compressive forces at the knee and reduced lumbar stress compared to back squats, while maintaining similar quadriceps and hamstring activity.

If you have knee pain from heavy back squats or lower back issues, try front squats. They hit the same muscles but put less crushing force on your knees and spine.

Maintaining a neutral spine and upright trunk posture during squats minimizes compressive and shear forces on the lumbar spine, whereas forward lean or lumbar flexion significantly increases injury risk.

Keep your back straight and your chest up when you squat. Leaning forward or rounding your back puts dangerous pressure on your discs and ligaments. If you can't stay upright, lighten the weight.

A 22-week low-fat vegan diet (≤10% energy from fat) significantly improves glycemic control (HbA1c), body weight, and cardiovascular risk factors (LDL cholesterol, urinary albumin) in individuals with type 2 diabetes compared to a standard American Diabetes Association (ADA) diet.

Adopt a low-fat vegan diet for 22 weeks to significantly improve blood sugar control and weight loss compared to standard diabetes guidelines. Focus on vegetables, fruits, grains, and legumes while avoiding all animal products and added fats. You do not need to count calories or restrict portions, but you must take a Vitamin B12 supplement. Keep your exercise routine the same as it was before starting.

Dietary patterns directly determine gut microbiota composition and metabolic output, with high-fiber/plant-rich diets promoting beneficial SCFA production and low-fat/high-fiber diets increasing Prevotella abundance, while Western diets (high fat/sugar/low fiber) shift the microbiome toward Firmicutes and reduce Bacteroidetes.

Your diet rapidly shapes your gut bacteria. Eating a plant-rich, high-fiber diet (like that of rural populations) promotes beneficial bacteria (Prevotella) and short-chain fatty acids (SCFA) that support gut health. Conversely, a Western diet high in fat and sugar shifts bacteria toward Firmicutes and reduces diversity. To improve your microbiome, prioritize diverse plant fibers and reduce processed fats and sugars, recognizing that your specific response may depend on your current microbial baseline.

Administering a specialized high-protein oral nutritional supplement containing beta-hydroxy-beta-methylbutyrate (HP-HMB) to malnourished, older adults (≥65 years) hospitalized for acute medical conditions significantly reduces 90-day post-discharge mortality compared to placebo.

For older adults (65+) who are malnourished and hospitalized for heart or lung conditions, starting a high-protein supplement with HMB immediately upon admission and continuing it for 3 months after discharge can significantly lower the risk of death. This intervention is most effective when started early (within 72 hours) and continued post-discharge.

Regular physical activity or exercise reduces all-cause mortality by approximately 13% compared to control groups, with the magnitude of benefit being larger for patients with cardiovascular disease than for other populations.

To reduce your risk of death, aim for at least 150 minutes of moderate-intensity aerobic activity per week (or 75 minutes of vigorous activity). You do not need to do extreme amounts of exercise to see benefits; simply meeting these minimums significantly lowers mortality risk, especially if you have cardiovascular issues.

Higher intake of total dietary fibre (specifically cereal and vegetable fibre) is associated with a significantly lower risk of developing type 2 diabetes, with a dose-response reduction of approximately 9% per 10 g/day increase.

To lower your risk of type 2 diabetes, increase your intake of total dietary fibre, with a specific focus on cereal and vegetable sources. Aim for an additional 10 grams of fibre per day, which is associated with a roughly 9% reduction in risk. Prioritize whole grains (like bread, pasta, and breakfast cereals) and vegetables over fruit for this specific benefit, as fruit fibre did not show the same protective association in this large-scale analysis. Note that much of this benefit appears to come from maintaining a healthy body weight.

Resistance exercise training (RET) significantly reduces depressive symptoms in adults, regardless of health status, total prescribed volume, or strength improvements.

Engage in resistance exercise training (RET) to reduce depressive symptoms. The specific volume, frequency, or intensity does not need to be optimized for strength gains, as the antidepressant effect is independent of these factors. Aim for a sustainable routine (e.g., 3 days/week) regardless of the total volume or whether you get stronger.