Browse the evidence

Ingesting carbohydrate 30–60 minutes before exercise does not impair performance and may enhance it, despite causing metabolic shifts like increased carbohydrate oxidation and inhibited fat oxidation.

You can safely eat carbohydrates 30–60 minutes before your event. It will not hurt your performance, and it might help. Just ensure you eat enough (e.g., up to 100g) without causing stomach distress. If you are prone to blood sugar crashes, test this in training.

Short-term consumption of soy nuts (containing natural isoflavones and unsaturated fats) reduces inflammatory markers (CRP, IL-18, TNF-alpha, E-selectin) and increases nitric oxide levels in postmenopausal women with metabolic syndrome, whereas isolated soy protein does not.

If you are a postmenopausal woman with metabolic syndrome, replacing one serving of red meat daily with roasted soy nuts (30g) for at least two months may help lower inflammation and improve blood vessel function. Simply eating soy protein powder or supplements may not offer these specific benefits because the whole nut provides essential fats and fiber that isolated protein lacks.

Resistance training alters the time course of fed-state muscle protein synthesis (MPS) by increasing the initial peak amplitude but shortening the duration of elevation, resulting in a lower total synthetic response over 28 hours compared to untrained muscle.

As you get stronger, your muscles become more efficient at handling stress, causing the growth signal (protein synthesis) to peak higher but fade faster. To maximize muscle growth, you must consume protein immediately after training to catch this sharp, short-lived peak, rather than relying on a prolonged, low-level signal.

Increasing whole fruit consumption by ≥7 servings/week over an 8-year period is associated with a reduced risk of incident hypertension, whereas increasing vegetable consumption by the same amount is not significantly associated with reduced risk.

If you want to lower your blood pressure risk by changing your diet, focus on increasing your fruit intake rather than just your vegetable intake. Try adding roughly one extra serving of whole fruit per day to your current diet and maintain that increase over several years. Simply eating more vegetables without increasing fruit may not provide the same protective benefit against hypertension.

Non-Exercise Activity Thermogenesis (NEAT) is the most variable component of total daily energy expenditure, ranging from 15% in sedentary individuals to over 50% in highly active individuals, and serves as a primary physiological mechanism for counterbalancing positive energy balance (fat gain) and negative energy balance (weight loss).

Focus on increasing your daily non-exercise movement (NEAT) rather than relying solely on gym workouts. This includes taking standing desks, walking during phone calls, fidgeting, and choosing active transportation. These small, frequent movements accumulate to significantly impact your total energy expenditure and can help counteract overeating or support weight loss efforts.

Resistance training alters the acute response of muscle protein synthesis (MPS) to exercise by attenuating the rise in non-myofibrillar (mixed) proteins while maintaining the synthesis of myofibrillar proteins, effectively refining the synthetic signal toward contractile proteins.

As you get stronger and more trained, your body becomes more efficient at building muscle. It stops wasting energy on non-essential cellular repairs (sarcoplasm) and focuses strictly on building the actual muscle fibers (myofibrils). This means you don't need to train to 'exhaustion' or do excessive volume to trigger growth; your body has refined its response to focus on what matters for size. Stick to progressive overload, but understand that 'more is better' has diminishing returns as you get trained.

Resistance training elevates resting mixed muscle protein synthesis rates by approximately 48% without changing resting myofibrillar protein synthesis rates.

After 8 weeks of training, your body's baseline protein turnover increases, specifically for non-muscle proteins like collagen and enzymes. This doesn't mean you are building more muscle at rest, but rather that your cellular maintenance is more active. This is a sign of adaptation, not necessarily hypertrophy.

Intensive lifestyle intervention (caloric restriction + 175 min/week moderate exercise) in overweight/obese T2DM patients reduces cardiovascular risk factors and improves quality of life but does not significantly reduce major cardiovascular events compared to standard diabetes education.

For T2DM patients, aiming for 175 minutes of moderate exercise and calorie restriction weekly is recommended for overall health and risk factor management, but do not expect this alone to guarantee a reduction in heart attacks or strokes. The primary benefit is improved quality of life and metabolic markers, not necessarily event reduction.

Plasma ghrelin concentrations increase significantly during negative energy balance (weight loss) and decrease during overfeeding, indicating that ghrelin acts as a homeostatic signal to defend body weight rather than simply reflecting current energy intake.

Your body uses ghrelin to signal hunger when you are in a calorie deficit and satiety when you are overfed. This is a natural defense mechanism to maintain body weight. Understanding this can help you anticipate hunger cues during weight loss and recognize that these changes are physiological, not a failure of willpower.

Chronic resistance training elevates resting skeletal muscle protein synthesis and breakdown rates, thereby attenuating the acute magnitude of protein turnover stimulation following a single bout of exercise at the same absolute workload.

As you get stronger, the same weight feels easier and triggers less acute metabolic stress. This is normal. Your body has adapted by raising its baseline protein turnover. To continue growing, you must progressively increase the load (intensity) to create a new stimulus, rather than relying on the same absolute weight.

Brown adipose tissue (BAT) is present in adult humans and its activity is inversely related to body mass index, suggesting a potential role in energy expenditure and body weight regulation.

While brown fat exists in adults and is more active in lean individuals, there is currently no proven, safe, and efficacious intervention to increase it for weight loss. Focus on established methods like diet and exercise.

Clinical staging of obesity should utilize systems like the Edmonton Obesity Staging System (EOSS) or Waist Circumference (WC) thresholds, as BMI alone fails to capture the severity of obesity-related complications and mortality risk in Asian populations.

Do not rely on BMI alone. Ask your doctor to measure your waist circumference and assess your overall health status (blood pressure, blood sugar, etc.) using a staging system like EOSS. This provides a more accurate picture of your health risks, especially if you are Asian and have 'normal' BMI but carry weight around your midsection.

Metabolically healthy obese (MHO) is not a stable state; approximately 30% of MHO individuals convert to metabolically unhealthy obese (MUHO) over 5-10 years, primarily due to aging and additional weight gain.

Do not assume your MHO status is permanent. Regular monitoring of metabolic markers and maintaining a healthy weight and activity level are essential to prevent conversion to MUHO.

Suboptimal dietary intake (specifically low whole grains, low dairy, and high processed meats) is directly associated with approximately 80,110 new cancer cases annually in US adults, representing 5.2% of all invasive cancers.

Focus on increasing whole grain and dairy consumption while reducing processed meat intake. This specific dietary shift is estimated to prevent a substantial number of cancer cases annually, particularly colorectal cancer. Prioritize whole grains (3 servings/day) and limit processed meats to less than 0.5 oz/day.

Insufficient whole grain intake is the single largest dietary contributor to preventable cancer cases, followed by low dairy intake and high processed meat consumption.

Aim for 3 servings of whole grains daily. This specific factor contributes to the highest number of preventable cancer cases. Ensure at least half of your grain intake is whole grains, as recommended by federal guidelines.

Obesity-mediated pathways account for approximately 16% of the diet-associated cancer burden, linking dietary factors like sugar-sweetened beverages and low fruit intake to cancer via BMI increases.

Maintaining a healthy weight through diet can reduce cancer risk via obesity-mediated pathways. Focus on reducing sugar-sweetened beverages and increasing fruit intake, which are key drivers of this specific risk pathway.

Twelve weeks of whole-body resistance training increases resting brachial artery diameter and postocclusion blood flow in young healthy men, but does not improve flow-mediated dilation (FMD) of conduit arteries.

If you lift weights, your arteries likely get wider and handle blood flow better, which is good for long-term health. However, don't expect resistance training to fix 'stiff' arteries in the same way cardio might. It’s a different type of adaptation: structural and flow-based rather than dilation-based.

Magnesium supplementation (20 mmol/d for 8 weeks) significantly lowers blood pressure in hypertensive patients, with the magnitude of reduction being greater in those with higher baseline blood pressure.

If you have high blood pressure, taking 480mg of magnesium oxide daily for at least 8 weeks may help lower it slightly, especially if your blood pressure is currently high. It is not a replacement for medication but a supportive lifestyle addition. Monitor your blood pressure to see if you respond, as those with higher starting pressures tend to see more benefit.

Short-term (14-day) unilateral leg immobilization causes a significantly greater loss of specific muscle strength (strength normalized to cross-sectional area) in women compared to men, despite similar levels of muscle atrophy at the fiber and whole-muscle levels.

If you are a woman recovering from an injury that requires immobilization (like a cast or brace), expect to lose more functional strength than your male counterparts, even if your muscle size shrinks by the same amount. This suggests that rehabilitation for women might need to focus more heavily on neuromuscular re-education and strength restoration early on, rather than just waiting for muscle mass to return.

A coach-supported interactive internet intervention for self-management of cardiovascular risk factors leads to a modest but statistically significant improvement in a composite score of systolic blood pressure, LDL cholesterol, and BMI in community-dwelling adults aged 65 and older over 18 months.

For seniors at risk of heart disease, using a guided online health platform with a human coach can help modestly improve blood pressure, cholesterol, and weight over 18 months. It works best for those who are already motivated and have basic computer skills. It is not a cure-all, but a feasible tool for self-management.

Mechanical loading induces skeletal muscle growth primarily through myofiber hypertrophy (increase in cross-sectional area) and fascicle architectural changes (increased length and pennation angle), rather than hyperplasia (increase in fiber number).

To maximize muscle growth, focus on resistance training that creates significant mechanical load. Expect your muscle fibers to get thicker (hypertrophy) and your muscle architecture to adapt (changes in fiber length and pennation angle). Do not rely on the idea that you are creating entirely new muscle fibers (hyperplasia), as evidence for this is weak and controversial.

Habitual consumption of tuna or other broiled/baked fish (dietary omega-3 fatty acids) is associated with favorable Heart Rate Variability (HRV) indices, specifically indicating greater vagal tone, moderated baroreceptor responses, and reduced erratic sinoatrial node firing in older adults.

To support heart rhythm health and autonomic balance, aim to consume tuna or other broiled/baked fish regularly (e.g., 1-2 times per week or more). This dietary pattern is associated with improved vagal tone and more stable heart rhythm patterns, which may contribute to a lower risk of cardiac death. Avoid fried fish preparations, as they did not show these benefits.

Animal protein provides a statistically significant advantage over plant protein for increasing percent lean mass, particularly in adults under 50 years of age, while absolute lean mass and muscle strength gains are generally equivalent between sources when total protein intake is adequate.

If you are under 50, choosing animal protein over plant protein may give you a slight edge in preserving lean tissue relative to your body weight, but it won't necessarily add more absolute muscle or strength if you eat enough total protein. For older adults, the source matters less than hitting your total protein targets. Focus on getting enough protein daily rather than obsessing over animal vs. plant source for strength outcomes.

Both endurance (cycling) and resistance (leg extension) exercise initiate similar early-time course phosphorylation of the Akt-mTOR-S6K translational signaling pathway during the first 60 minutes of recovery, indicating that both modalities stimulate protein synthesis machinery.

If your goal is to stimulate the muscle's internal machinery for growth (protein synthesis), both heavy lifting and steady-state cardio are effective triggers in the hour following exercise. You do not need to choose one exclusively to activate these specific growth signals; both work similarly in the short term.