Browse the evidence

Caffeine enhances endurance exercise performance by reducing the perception of effort and pain, rather than through metabolic sparing or sympathetic nervous system activation.

To improve endurance performance, consume caffeine (approx. 1.5-6 mg/kg body weight) before or during exercise. This works by making the effort feel easier and reducing pain, allowing you to sustain higher intensity for longer. It is not primarily about burning fat or increasing adrenaline.

Twelve weeks of moderate-intensity aerobic exercise improves insulin sensitivity in older, obese, sedentary adults with impaired glucose tolerance, regardless of whether caloric intake is maintained (eucaloric) or restricted (hypocaloric).

If you are an older adult with excess weight and pre-diabetes, committing to 5 days a week of moderate aerobic exercise (like brisk walking or cycling at 75% of your max effort) for 12 weeks can significantly improve your body's ability to handle insulin. You do not necessarily need to combine this with a strict calorie-restricted diet to see these specific metabolic benefits, although losing fat mass may offer additional advantages for fat oxidation.

A web-based tailored expert system for weight management produces significantly greater weight loss and higher user satisfaction than static, information-only web materials in overweight and obese adults.

If you are trying to lose weight online, choose a program that adapts to your specific situation (like your diet, activity level, and stress) rather than one that just gives you generic articles. This study shows that personalized, automated feedback leads to significantly more weight loss (3% vs 1.2%) and is easier to follow than static information.

Ingesting 40 g of whey protein following whole-body resistance exercise stimulates a greater myofibrillar protein synthesis (MPS) response than 20 g in young resistance-trained men.

If you perform a full-body resistance workout, consume 40g of high-quality protein (like whey) immediately after. This dose stimulates muscle protein synthesis significantly more than the commonly recommended 20g. While 20g is effective, 40g provides a greater anabolic response for whole-body training sessions.

Engaging in physical activity appropriate to an individual's current activity level, health status, and physical function yields health benefits that generally outweigh the risks for people living with disability, with no major risks identified.

If you have a disability, you can and should be physically active. Start with small amounts of activity that feel safe for your current health and ability level. The health benefits you get from moving are greater than the risks. Gradually increase how often, how hard, and how long you exercise as you are able. Doing some activity is always better than doing none.

Post-resistance exercise ingestion of high-quality milk proteins (whey/casein) promotes greater muscle protein synthesis and lean mass accretion compared to soy protein or carbohydrate alone, primarily due to faster digestion rates and higher leucine content.

After resistance training, choose whey or casein (milk proteins) over soy or carbohydrates. Milk proteins digest faster and contain more leucine, triggering muscle growth more effectively than soy, even if the total protein amount is the same.

Elderly individuals exhibit 'anabolic resistance' to amino acids, requiring higher leucine thresholds or faster-digesting proteins (like whey) to stimulate muscle protein synthesis compared to younger individuals.

If you are older, focus on whey protein (fast-digesting, high-leucine) after workouts rather than casein or soy. Your muscles need a stronger 'leucine trigger' to start building muscle compared to when you were younger.

Tirzepatide 15 mg once weekly produces significantly greater fat mass reduction and total body weight loss compared to semaglutide 1 mg and placebo in people with type 2 diabetes, primarily driven by fat mass rather than fat-free mass changes.

If you have type 2 diabetes, tirzepatide 15 mg taken once weekly is more effective than semaglutide 1 mg for reducing body fat and total weight. The weight loss comes mainly from fat, preserving muscle mass better than placebo. This suggests that for T2D patients seeking significant fat loss, tirzepatide may be a superior pharmacological option to semaglutide.

Chronic sleep restriction (4-5 hours/night) significantly reduces insulin sensitivity and increases diabetes risk in healthy adults.

Prioritize getting 7-9 hours of sleep nightly. Chronic sleep restriction (4-5 hours) significantly impairs your body's ability to process glucose and increases insulin resistance, mimicking the metabolic state of obesity or diabetes. Consistent sleep duration is as critical for metabolic health as diet and exercise.

Alternative workstation interventions (sit-stand or treadmill) significantly reduce overall sedentary behavior during productive work without negatively affecting work performance.

If your job allows, use a sit-stand or treadmill desk. The evidence strongly supports that this reduces sitting time without hurting your work output. To make it stick, get some coaching and ensure your manager supports the change.

Older adults (60-66 years) can increase muscle power output to a similar magnitude as younger adults (21-30 years) through 12 weeks of high-intensity progressive resistance training.

If you are in your 60s, you can significantly improve your muscle power through resistance training. Follow a program that trains twice a week, using weights that are 80% of your one-rep max. Perform three sets per exercise, with the last set taken to fatigue. This will help you maintain independence and functional ability.

Consuming at least 3 grams per day of oat beta-glucan significantly reduces total and LDL cholesterol, with no additional benefit observed at higher doses.

To lower your LDL cholesterol, incorporate oat products providing at least 3 grams of beta-glucan into your daily diet. You do not need to exceed this amount for additional cholesterol benefits, as studies show no extra gain above 3 grams. Focus on consistent daily intake rather than high doses.

Home-based aerobic exercise yields superior long-term weight loss and adherence compared to group-based exercise in obese women, primarily due to reduced logistical burden and increased convenience.

If you are struggling to stick with a gym-based weight loss program, try moving your exercise to your home. This study found that home-based walking (30 mins, 5 days/week) led to significantly more weight loss and better adherence than group exercise over 15 months, likely because it removes the hassle of traveling to a clinic. Focus on consistency and convenience rather than social accountability.

Adherence to the Mediterranean Diet (MD) significantly reduces the risk of developing Type 2 Diabetes, Metabolic Syndrome, and Cardiovascular Disease, and improves cognitive function and longevity.

Adopt a plant-forward diet rich in vegetables, fruits, whole grains, and olive oil. Aim for high fiber intake (30-35g/day) and moderate healthy fats. This pattern is associated with lower risks of heart disease, diabetes, and cognitive decline, regardless of your cultural background.

The Mediterranean Diet improves gut microbiota diversity and increases the abundance of beneficial bacteria (e.g., Bifidobacteria, Faecalibacterium prausnitzii) and short-chain fatty acid producers, while reducing pro-inflammatory species.

Eating a diverse range of plant-based foods, especially high-fiber vegetables, fruits, and whole grains, feeds beneficial gut bacteria. This supports metabolic health and reduces inflammation.

Adherence to a Mediterranean diet pattern (rich in olive oil, nuts, vegetables, fruits, legumes, fish; moderate alcohol; low red/processed meat) significantly reduces the prevalence and incidence of metabolic syndrome compared to control or low-fat diets.

Adopt a Mediterranean dietary pattern as your primary nutritional strategy for metabolic health. Focus on daily consumption of extra virgin olive oil, mixed nuts, vegetables, fruits, legumes, and fish. Limit red and processed meats, refined carbohydrates, and whole-fat dairy. Moderate alcohol consumption (if any) is acceptable. This approach improves metabolic syndrome markers (blood pressure, lipids, glucose) through food quality and fat composition, not just calorie restriction.

Replacing saturated fatty acids (SFA) and trans fatty acids (TFA) with monounsaturated (MUFA) and polyunsaturated fatty acids (PUFA) improves insulin sensitivity and reduces the risk of type 2 diabetes.

Focus on the quality of fats in your diet. Replace saturated fats (found in red meat, butter, full-fat dairy) and trans fats with unsaturated fats, specifically monounsaturated (olive oil, nuts, avocados) and polyunsaturated fats (fatty fish, walnuts). This substitution improves insulin sensitivity and reduces diabetes risk more effectively than simply reducing total fat intake.

High intake of dietary fiber, particularly from whole grains, is associated with lower central adiposity, reduced weight gain, and improved insulin sensitivity.

Increase your intake of dietary fiber, specifically from whole grains, vegetables, fruits, and legumes. Aim for high-fiber whole foods rather than supplements. This helps control weight gain, reduces central adiposity (waist circumference), and improves insulin sensitivity.

A three-month supervised Nordic Walking program significantly increases daily physical activity (walking and standing time) and functional exercise capacity (6MWD) in COPD patients, with benefits sustained for at least six months post-intervention.

If you have COPD, try Nordic Walking (walking with poles) three times a week for one hour. Aim for 75% of your max heart rate, but adjust your speed if you get breathless. This specific type of walking has been shown to increase your daily walking and standing time and improve your ability to walk longer distances, with benefits lasting even after the supervised program ends. It is a safe, accessible way to break the cycle of inactivity.

High intensity (HI) exercise improves global quality of life and reduces anxiety more effectively than wait-list control, whereas low-to-moderate intensity (LMI) does not show significant benefits for these specific psychological outcomes compared to control.

If you are a woman or younger cancer survivor, high intensity exercise may offer specific mental health benefits, such as improved quality of life and reduced anxiety, that low-to-moderate intensity might not provide. Consider HI if you are medically cleared and seeking these psychological boosts.

Dietary diversification, specifically increasing the number of food groups consumed, significantly improves micronutrient adequacy and reduces the prevalence of multiple micronutrient deficiencies compared to monotonous diets.

To improve your nutrient intake, aim to eat from 5 to 6 different food groups every day. This doesn't mean eating huge amounts, but rather including a variety like grains, vegetables, fruits, proteins, and fats. This approach is more sustainable than just taking pills and helps prevent hidden deficiencies, especially for children and pregnant women in resource-limited settings.

Consuming specific food synergies, such as Vitamin C with iron or fat with carotenoids, significantly enhances the bioavailability of micronutrients compared to consuming them in isolation.

Boost your iron absorption by eating Vitamin C-rich foods (like guava, papaya, or citrus) with your iron-rich meals. Also, include a small amount of fat (like 2.4g) with your vegetable dishes to help your body absorb Vitamin A precursors.

Regular aerobic exercise (specifically cardio) downregulates systemic inflammation (CRP, IL-6, TNF-alpha) and improves wound healing in trauma survivors and older adults.

Engage in regular aerobic exercise, such as walking, for 30-45 minutes, 3-5 times a week. Keep the intensity moderate (60-80% of max heart rate). If you are a trauma survivor, start very slowly to avoid triggering distress or PTSD symptoms. Consistency is key to lowering inflammation and improving health.

Adherence to a Mediterranean Diet (MD) pattern reduces the incidence of chronic diseases, including cardiovascular disease (CVD), type-2 diabetes, and certain cancers, primarily through the synergistic effects of its macronutrient composition (high MUFA/PUFA, low SFA) and bioactive phenolic compounds.

Adopt a Mediterranean-style eating pattern as your baseline. Prioritize extra virgin olive oil as your main fat source, consume fish regularly for omega-3s, and limit red meat and saturated fats. If you drink alcohol, limit it to moderate levels (1 drink/day for women, 2 for men) with meals. Combine this diet with at least 30 minutes of brisk walking daily to maximize metabolic and cardiovascular benefits.