Browse the evidence

Sedentary behavior is a major independent risk factor for chronic disease morbidity and mortality in older adults, and the decline in overall physical activity with age has significant public health implications.

Avoid prolonged sitting. Even without formal exercise, simply increasing daily movement (standing, walking, chores) reduces the high risk of chronic disease and death associated with a sedentary lifestyle.

Abdominal obesity, specifically visceral fat accumulation, is independently associated with metabolic disturbances and increased risk of cardiovascular disease and type 2 diabetes, regardless of overall body mass index.

Focus on waist circumference, not just weight. If your waist is large (over 102 cm for men, 88 cm for women), you have higher visceral fat and metabolic risk, even if your BMI is normal. Measure your waist to assess true health risk.

High conformity with the Mediterranean dietary pattern is associated with a statistically significant reduction in all-cause, cardiovascular, and cancer mortality in a large US population.

Adopt a Mediterranean-style diet by prioritizing vegetables, legumes, fruits, nuts, whole grains, and fish, while limiting red/processed meat and dairy. This pattern is associated with a 20-25% lower risk of death from all causes, including heart disease and cancer, in US adults. You do not need to calculate a score; simply make these food choices your default.

US adults significantly improved diet quality between 1999 and 2016 by decreasing low-quality carbohydrates (primarily added sugars) and increasing high-quality carbohydrates (primarily whole grains), plant protein, and polyunsaturated fats.

Focus on swapping low-quality carbohydrates for high-quality ones. Specifically, reduce added sugars and increase intake of whole grains, plant-based proteins (like nuts and whole grains), and polyunsaturated fats. While overall diet quality has improved, these specific swaps are the key drivers of that improvement.

An isocaloric Mediterranean diet intervention significantly lowers total, LDL, and HDL plasma cholesterol in overweight and obese adults within 4 weeks, independent of energy intake or physical activity changes.

If you are overweight or obese, switching to a Mediterranean dietary pattern can lower your total and LDL cholesterol within just 4 weeks, even if you do not lose weight or change your exercise habits. Focus on replacing meat and refined cereals with fruits, vegetables, whole grains, legumes, and nuts. The greater your adherence to this pattern, the more your cholesterol drops.

Combining sibutramine pharmacotherapy with intensive group lifestyle modification counseling produces significantly greater weight loss than either intervention administered alone.

If you are using prescription weight-loss medication, do not rely on it alone. You must combine it with intensive lifestyle counseling, specifically focusing on behavioral skills like keeping daily food records. The study shows that combining the drug with 30 weeks of group counseling leads to more than double the weight loss compared to using the drug alone.

High adherence to behavioral self-monitoring (specifically daily food-intake record-keeping) significantly enhances weight loss outcomes in patients receiving combined pharmacotherapy and lifestyle modification.

If you are on a weight-loss medication, you must keep daily records of what you eat. The study shows that patients who tracked their food frequently lost more than twice as much weight (18 kg) as those who tracked infrequently (7.7 kg). This behavioral step is critical for maximizing results.

Internet-delivered cognitive-behavioral therapy for insomnia (eCBT-I) significantly improves insomnia severity, sleep efficiency, and sleep onset latency compared to control groups, with effect sizes comparable to face-to-face CBT-I.

If you struggle with insomnia, internet-delivered CBT-I (eCBT-I) is a viable, evidence-based treatment option. It delivers the same core techniques as face-to-face therapy (like sleep restriction and cognitive restructuring) online. You can expect significant improvements in sleep quality and duration, comparable to seeing a therapist in person. Look for programs that offer some level of clinical support if you need extra guidance, but even automated programs can be effective.

Orlistat reduces the absorption of fat-soluble vitamins (specifically D and E) and beta-carotene, necessitating daily multivitamin supplementation taken 2 hours before or after the drug.

Take a standard multivitamin every day while on Orlistat. Take it at least 2 hours before or 2 hours after your Orlistat dose to ensure your body can absorb the vitamins, as the drug blocks fat-soluble vitamin absorption.

Maintaining a healthy body weight (BMI 20-25) is crucial for fertility, as both obesity (BMI >30) and underweight (BMI <20) are associated with delayed conception, ovulatory dysfunction, and reduced ART success rates.

Aim for a BMI between 20 and 25 if you are trying to conceive. Both being underweight and overweight can disrupt ovulation and reduce your chances of pregnancy. If you are overweight, even a modest weight loss (e.g., 5-10% of body weight) can significantly improve ovulation and fertility.

Diet and physical activity based interventions during pregnancy significantly reduce gestational weight gain compared to routine care, with a mean difference of -0.70 kg.

Engage in moderate physical activity and follow a balanced diet during pregnancy. This combination significantly reduces excessive weight gain and lowers the risk of caesarean section without harming the baby. These benefits apply to women of all body weights, not just those who are obese.

Diet and physical activity based interventions during pregnancy significantly reduce the odds of caesarean section.

Engage in moderate physical activity and follow a balanced diet during pregnancy. This combination significantly reduces the odds of requiring a caesarean section. These benefits apply to women of all body weights.

Strength training adaptations are driven by neural factors early on, and muscle hypertrophy requires reaching muscular failure regardless of load, though high loads are needed for maximal strength gains.

To build muscle, you don't necessarily need to lift heavy weights. As long as you train close to muscular failure, lighter weights can build muscle just as effectively. However, if your goal is maximal strength, you still need to lift heavy loads.

Sleep deprivation increases the risk of cardiometabolic diseases (hypertension, type 2 diabetes, obesity) by promoting systemic inflammation, insulin resistance, and sympathetic nervous system overactivity.

Aim for 7-8 hours of sleep to protect your heart and metabolic health. Chronic sleep restriction (<6 hours) significantly increases your risk of obesity, type 2 diabetes, and hypertension by promoting inflammation and insulin resistance. Prioritizing sleep is a foundational strategy for preventing cardiometabolic disease.

Weight loss achieved through an intensive lifestyle intervention significantly reduces the severity of obstructive sleep apnea (OSA) in obese patients with type 2 diabetes, with greater weight loss correlating to greater AHI reduction.

If you have type 2 diabetes and sleep apnea, losing weight is one of the most effective ways to reduce the severity of your sleep apnea. Aim for at least 10 kg (22 lbs) of weight loss through a calorie-controlled diet and regular moderate exercise (like brisk walking). This can significantly reduce the number of breathing interruptions during sleep and may even lead to the remission of sleep apnea.

Men and patients with higher baseline OSA severity experience greater reductions in Apnea-Hypopnea Index (AHI) from weight loss interventions.

While weight loss helps everyone with sleep apnea, men and those with more severe sleep apnea tend to see the biggest improvements in their breathing metrics. If you are a man or have severe sleep apnea, prioritizing weight loss may yield the most dramatic relief from your symptoms.

Liraglutide 3.0 mg significantly reduces Obstructive Sleep Apnea (OSA) severity, measured by Apnea-Hypopnea Index (AHI), in individuals with obesity and moderate-to-severe OSA who are unable or unwilling to use CPAP therapy.

If you have moderate to severe sleep apnea and obesity, and you can't or won't use a CPAP machine, ask your doctor about Liraglutide 3.0 mg. It is a once-daily injection that helps you lose weight and significantly reduces the number of times you stop breathing during sleep. The most common side effects are nausea and diarrhea, but these usually go away after a few weeks. It works best when combined with a healthy diet and exercise.

Caffeine ingestion (median 6.0 mg/kg) significantly reduces Rating of Perceived Exertion (RPE) during constant-load exercise compared to placebo, an effect that partially explains the subsequent improvement in exercise performance.

Take approximately 6mg of caffeine per kg of body weight about 60 minutes before exercise. Ensure you have abstained from caffeine for at least 24 hours beforehand. This will likely lower how hard the exercise feels during the activity, allowing you to sustain higher intensities or durations, particularly if you are well-trained. Note that this reduction in perceived effort does not necessarily persist at the very end of an all-out exhaustion test.

Canagliflozin (100 mg and 300 mg) significantly reduces HbA1c, body weight, and systolic blood pressure in patients with type 2 diabetes on background metformin compared to placebo and sitagliptin.

If you have type 2 diabetes and are already taking metformin, adding canagliflozin (100mg or 300mg daily) can significantly lower your blood sugar, help you lose weight, and reduce blood pressure compared to placebo or sitagliptin. While there is a slightly higher risk of genital yeast infections and urinary frequency, these are usually mild and rarely cause people to stop the medication. Hypoglycemia risk remains low.

Restricting total carbohydrate intake to less than 130 g/day is not recommended for the management of diabetes.

Do not restrict your carbohydrate intake to less than 130 grams per day. Your brain needs glucose, and restricting carbs this low may deprive you of essential nutrients like fiber and vitamins. Aim for 45-65% of your calories from carbohydrates, focusing on high-quality sources.

Moderate weight loss markedly reduces the development of type 2 diabetes in individuals with impaired glucose tolerance, independent of glycemic index/load.

If you are at risk for type 2 diabetes (impaired glucose tolerance), focus on achieving moderate weight loss. This is the single most effective step you can take to prevent the disease, more so than focusing solely on glycemic index or load.

Lifestyle interventions combining dietary changes and physical activity significantly reduce the risk of developing type 2 diabetes in high-risk individuals (those with impaired glucose tolerance or metabolic syndrome).

If you have impaired glucose tolerance or metabolic syndrome, combining modest weight loss (5-7% of body weight) with increased physical activity (aiming for ~150 minutes per week) and a diet lower in saturated fat and higher in fiber can reduce your risk of developing type 2 diabetes by nearly half. These benefits can last for many years, even after the active intervention ends.

The risk reduction from lifestyle interventions for type 2 diabetes prevention is sustained for many years (up to 20 years) after the active intervention phase.

The effort you put into lifestyle changes now continues to protect you from type 2 diabetes for many years, even after you stop actively tracking your diet and exercise. The benefits do not disappear when the 'program' ends.

Ingesting carbohydrates during endurance exercise (30-60g/hour) sustains blood glucose and improves performance, while adding protein (CHO:PRO ratio 3-4:1) further enhances endurance performance and glycogen re-synthesis.

For any endurance activity lasting over an hour, drink a 6-8% carbohydrate solution (8-16 oz) every 10-15 minutes. If you want to maximize performance and recovery, add protein to create a 3:1 or 4:1 carb-to-protein ratio. This keeps your blood sugar stable and helps you go longer.