Browse the evidence

Adherence to vegetarian or vegan dietary patterns is associated with a significantly reduced risk of coronary heart disease (CHD) mortality and type 2 diabetes mellitus (T2DM) compared to regular meat-eating.

To lower your risk of heart disease and type 2 diabetes, shift your diet towards plant-based foods. You do not need to be strictly vegan; even reducing meat intake and increasing fruits, vegetables, legumes, and whole grains yields significant benefits. Ensure you monitor key nutrients like B12 and Iron, especially if you are vegan.

Combining diet and exercise is preferable to diet alone because it preserves fat-free mass and improves cardiorespiratory fitness, whereas diet alone reduces fat-free mass.

If you are losing weight postpartum, combine diet with exercise. Dieting alone might cause you to lose muscle mass, while adding exercise helps maintain your muscle and improves your heart health, making the weight loss more beneficial for your long-term health.

Regular, supervised, individualized exercise (aerobic, resistance, balance, or combined) is safe and effective for improving cardiorespiratory fitness, muscle strength, fatigue, and quality of life in patients with multiple sclerosis (MS), without triggering disease exacerbation.

Start with a medical screening to ensure safety. Begin with low-to-moderate intensity aerobic exercise (like walking or cycling) for 10-40 minutes, 2-5 times a week. Add resistance training 2-3 times a week using machines for safety. If you get hot or tired, use cooling strategies (fans, cool water) and take breaks. Focus on consistency and gradual progression rather than intensity. Consult a specialist to tailor the program to your specific disability level.

Weight loss interventions (calorie-restricted diet, intragastric balloon, bariatric surgery) significantly improve lung function parameters (ERV, FRC, TLC) and reduce metabolic syndrome in obese individuals.

If you are obese and experiencing breathing difficulties or reduced lung capacity, losing weight is the most effective way to reverse these specific physical impairments. You do not need to reach a 'normal' BMI to see benefits; even modest weight loss through diet, medical devices like intragastric balloons, or surgery can significantly improve your lung volumes (ERV, FRC) and reduce the mechanical load on your respiratory muscles. Focus on any sustainable weight loss strategy, as the pulmonary benefits are directly proportional to the reduction in excess adipose tissue.

Consuming dietary protein at 1.6 g/kg/day (2x RDA) during a 40% energy deficit preserves fat-free mass and maintains muscle protein synthesis sensitivity to feeding, whereas 2.4 g/kg/day (3x RDA) provides no additional fat-free mass protection.

If you are losing weight, aim for 1.6 grams of protein per kilogram of body weight daily. This amount is sufficient to protect your muscle mass while you lose fat. Eating significantly more (e.g., 2.4 g/kg) does not provide additional muscle protection and may be unnecessary. Ensure you are in a moderate caloric deficit and maintain your usual activity level.

During an energy deficit, muscle protein synthesis (MPS) sensitivity to feeding is preserved with 2x and 3x RDA protein intake, but is inhibited with RDA protein intake.

When cutting calories, your body's ability to use protein for muscle building can be blunted if you don't eat enough protein. Ensure you consume at least 1.6g/kg of protein daily to keep your muscles responsive to meals and prevent muscle loss.

Postprandial glucose response to identical meals varies significantly between individuals, suggesting that personalized nutrition based on glycemic response is more effective than standardized dietary guidelines focused solely on macronutrient composition.

Generic dietary advice (like 'low carb') may not work for everyone. Your body's response to specific foods (e.g., milk/cereal vs. protein bars) varies. Using CGM to test your response to specific foods can help you identify which foods cause severe glucose spikes for you personally, allowing for personalized nutrition.

An intensive lifestyle intervention combining individualized dietary advice (reduced saturated fat, increased fiber) and increased physical activity significantly reduces body weight and improves glucose tolerance, blood pressure, and serum triglycerides in overweight individuals with impaired glucose tolerance (IGT) compared to general health advice.

If you are overweight and have impaired glucose tolerance, a structured lifestyle program focusing on losing 5-10 kg, eating more fiber and less saturated fat, and increasing physical activity can significantly improve your blood sugar, blood pressure, and cholesterol levels. This approach is feasible and can be managed with regular support from healthcare professionals, potentially delaying or preventing type 2 diabetes.

A calorie-restricted vegetarian diet improves insulin sensitivity and reduces visceral fat more effectively than a conventional diabetic diet in patients with Type 2 diabetes, with benefits augmented by aerobic exercise.

For Type 2 diabetes management, switching to a calorie-restricted vegetarian diet (focusing on vegetables, grains, legumes, fruits, and nuts, with minimal low-fat dairy) can improve insulin sensitivity and reduce visceral fat more effectively than standard diabetic diets. Adding aerobic exercise enhances these benefits. The study provided all meals, suggesting that structured support is key to adherence.

High-intensity interval training (HIIT) or combined interval/continuous training produces significantly greater increases in VO2max (mean +0.51 L/min) compared to traditional continuous endurance training, with evidence suggesting marked responses in nearly all subjects when using longer intervals (3-5 min).

To maximize your VO2max, incorporate High Intensity Interval Training (HIIT) into your routine. Aim for at least 3 days a week, with each session including at least 10 minutes of high-intensity work. Use intervals of 3-5 minutes with equal rest periods. This approach is more effective for boosting aerobic capacity than traditional continuous endurance training, especially for healthy adults under 45.

Combining high-frequency aerobic exercise with social influence strategies and therapist contact yields the best long-term weight loss maintenance, with one condition maintaining 99% of post-treatment weight loss at 18 months.

The most effective way to keep weight off long-term is a comprehensive approach: regular check-ins with a professional, moderate exercise you can sustain, and a support network. This combination helps you handle setbacks and maintains your weight loss almost entirely. Start with the most manageable components and build up.

Adherence to the traditional Mediterranean Diet (MedDiet) is associated with an 11% relative reduction in the risk of cardiovascular disease (CVD) mortality or incidence for each 2-point increment in a 0-9 adherence score.

To get the cardiovascular benefits of the Mediterranean Diet, you don't need to move to Italy. Focus on making extra-virgin olive oil your primary cooking fat and dressing for salads. Eat plenty of vegetables, fruits, legumes, and whole grains. Limit red and processed meats, and choose fish and poultry more often. If you drink alcohol, do so moderately with meals, preferably wine. This pattern, not just individual 'superfoods', is what reduces heart disease risk.

Acute caffeine ingestion (2.5–7 mg/kg) significantly improves performance in short-term high-intensity exercise (sprinting, team sports, resistance training), with effects being more pronounced in trained athletes and non-habitual users.

If you are a trained athlete engaging in short, high-intensity efforts (like sprinting or heavy lifting), taking 3-6 mg of caffeine per kg of body weight about 45-60 minutes before exercise can improve performance by roughly 6-9%. This benefit is strongest if you are not a heavy daily coffee drinker. If you are untrained or doing long endurance, the benefit is less clear. Avoid doses above 9 mg/kg to prevent side effects like anxiety.

Regular moderate-intensity physical activity (e.g., walking) reduces the risk of cardiovascular disease in a dose-dependent manner, with more intense or frequent exercise providing further risk reduction.

To protect your heart, engage in regular physical activity. You do not need to run marathons; walking at a moderate pace (where you breathe harder and feel warm) is effective. If you are able, increasing the intensity to running, doing it more frequently, or extending the duration will further lower your risk.

Physical activity improves psychological wellbeing, reduces clinical depression risk, and has a beneficial effect on anxiety.

Regular physical activity is a proven way to improve your mental health. It reduces the risk of clinical depression, helps with anxiety, and boosts mood and self-esteem. Incorporate activity into your routine to support your psychological wellbeing.

For women with Gestational Diabetes Mellitus (GDM), lifestyle modification (medical nutrition therapy and physical activity) alone is sufficient to control blood glucose in 70–85% of cases, making it the essential first-line treatment.

Start with diet and exercise. Aim for at least 175g of carbs daily, focusing on complex carbs and fiber. Monitor your weight gain according to your pre-pregnancy BMI. This approach works for the majority of women with GDM.

Sibutramine and Orlistat are effective pharmacological interventions for weight loss, achieving approximately 5% to 10% weight reduction maintained for up to 2 years.

Sibutramine and Orlistat are FDA-approved medications for long-term weight loss. They typically help patients lose 5-10% of their body weight, which is maintained for up to 2 years. Sibutramine works by increasing satiety, while Orlistat blocks fat absorption. They are indicated for those with a BMI over 30, or over 27 with health complications.

High-intensity interval training (HIIT) produces greater improvements in peak oxygen uptake (VO2peak) compared to moderate-intensity continuous training (MICT) in patients with coronary artery disease (CAD) and heart failure with reduced ejection fraction (HFrEF), primarily due to greater metabolic stress and mitochondrial biogenesis.

If you have stable heart disease, HIIT can boost your heart's efficiency (VO2peak) more than steady-state exercise. However, it is not strictly necessary for everyone. The most important factor is doing enough total exercise (energy expenditure). If you hate HIIT, do moderate exercise instead; just make sure you do enough of it. Always consult your doctor, and choose the intensity you can stick with long-term.

Both Nordic hamstring exercises (NHE) and hip extension exercises (HE) significantly increase biceps femoris long head (BFLH) fascicle length, with no significant difference between the two methods, thereby potentially reducing hamstring injury risk.

Perform the Nordic Hamstring Exercise (NHE) or Hip Extension (HE) twice weekly for 10 weeks to significantly increase hamstring fascicle length, which is linked to reduced injury risk. Start with bodyweight for NHE and progress to adding weight as you get stronger. For HE, start at 60-70% of your one-rep max and increase load progressively. Both exercises are effective for lengthening the biceps femoris long head, a key factor in preventing strains.

Adherence to a DASH diet for 8 weeks significantly improves weight loss, BMI, liver enzymes (ALT, ALP), insulin resistance (HOMA-IR), and inflammatory/oxidative stress markers (hs-CRP, MDA, NO, GSH) in overweight/obese adults with NAFLD compared to a calorie-restricted control diet.

If you have NAFLD, switching to a DASH-style diet for 8 weeks while maintaining your usual activity level can lead to better weight loss and improved liver health than just cutting calories alone. Focus on fruits, vegetables, whole grains, and low-fat dairy, while limiting saturated fats and sodium. The study used a moderate calorie deficit (350-700 kcal below maintenance) to ensure ethical weight loss in both groups, but the DASH composition drove superior metabolic outcomes.

Heavy resistance strength training produces significant muscle hypertrophy in older adults (65-75 years) comparable to young adults (20-30 years) when using the same relative training stimulus.

If you are an older adult, you can build significant muscle mass through strength training. The key is using heavy resistance that challenges you, similar to how younger people train. Don't let the myth of 'anabolic resistance' stop you; your muscles can still grow if you lift heavy enough.

Beta-alanine supplementation significantly improves exercise capacity (time to exhaustion) and performance in high-intensity exercise lasting 60–240 seconds, but provides no benefit for exercise lasting less than 60 seconds.

If you engage in high-intensity efforts lasting 1 to 4 minutes (like a 400m run or a hard interval session), beta-alanine supplementation can improve your performance by roughly 3% on average. It will not help you in very short, explosive sprints under 60 seconds. To get benefits, you need to supplement daily for several weeks to build up muscle carnosine levels; there is no advantage to taking massive doses, so stick to standard daily regimens (e.g., 3-6g/day).

High-intensity interval training (HIIT) is superior to moderate-intensity continuous training (MICT) for improving cardiorespiratory fitness in cardiac rehabilitation patients, with significant benefits observed in programs lasting 7–12 weeks.

If you have coronary artery disease and are in cardiac rehab, High-Intensity Interval Training (HIIT) is likely more effective than moderate continuous exercise for improving your heart fitness. Look for programs that last 7 to 12 weeks and use intervals at 85% or more of your max capacity. These programs are supervised and have been shown to be safe, with no increased risk of cardiac events compared to moderate exercise.

Repeated sprint training in hypoxia (3000m simulated altitude) significantly increases the number of sprints to exhaustion compared to normoxic training, despite similar average power output improvements, by enhancing muscle blood perfusion and glycolytic capacity.

If you are a trained cyclist, adding 8 sessions of repeated sprint training in a hypoxic chamber (simulating 3000m) over 4 weeks can help you perform more sprints to exhaustion than if you did the same training in normal air. This happens because hypoxia triggers your body to increase blood flow to muscles and boost glycolytic enzymes, allowing you to delay fatigue during repeated high-intensity efforts. However, this does not necessarily increase your single-sprint peak power or your aerobic endurance (VO2max).