Browse the evidence

Pre-operative nutritional assessment and correction of deficiencies (especially Vitamin D and Iron) is critical before bariatric surgery to mitigate post-operative risks.

Before your surgery, ask for a full nutritional panel, specifically checking Vitamin D and Iron levels. Correct any deficiencies now to give your body the best chance to recover without severe complications.

Lifestyle interventions, specifically weight loss and exercise, reduce sympathetic nerve activity and improve metabolic control in patients with Metabolic Syndrome.

For Metabolic Syndrome, start with lifestyle changes. A 12-week program involving a hypocaloric diet and moderate exercise can lead to significant weight loss (e.g., 9%) and improved metabolic markers by reducing sympathetic nerve activity.

Daily supplementation with menaquinone-7 (MK-7) at 150 µg/d is significantly more effective than synthetic Vitamin K1 at 150 µg/d at promoting the carboxylation of osteocalcin in bone tissue over a 6-week period.

For bone health, MK-7 (from natto) is more effective than synthetic Vitamin K1. You need less MK-7 (e.g., 25-150 µg) to get the same bone benefits as higher doses of K1 (100+ µg). However, if you are on blood thinners, avoid MK-7.

An RPE scale based on Repetitions in Reserve (RIR) provides a valid and practical method for autoregulating resistance training intensity, as it demonstrates a strong inverse relationship with barbell velocity and accurately reflects effort across varying experience levels.

Stop guessing your weights based on a percentage of a max you might not have tested recently. Instead, use the RIR scale: after each set, ask yourself how many more reps you could have done. If you could do 2 more, that's an RPE of 8. If you could do 0 more, that's an RPE of 10. Use this feedback to adjust your weight daily. If you hit your target reps with an RPE of 7, add weight next time. If you hit them with an RPE of 9, keep the weight. This ensures you are training at the right intensity every session, regardless of how you feel.

Regular exercise improves sleep quality and duration, with the effect being most robust in middle-aged and elderly adults, particularly those with chronic diseases.

If you are middle-aged or older, or manage a chronic condition like high blood pressure or diabetes, regular exercise is one of the most effective ways to improve your sleep. You don't need to worry about the specific type or intensity; moderate activity is sufficient. If you struggle with falling asleep, try morning exercise. If you wake up often, evening exercise might help. Consistency is key.

Walking is inversely associated with cardiovascular disease (CVD) risk and all-cause mortality, with brisk walking pace being a stronger independent predictor of risk reduction than walking volume.

Incorporate walking into your daily routine, aiming for a brisk pace (where you can talk but not sing) for at least 2.5 hours per week. This level of activity is strongly associated with reduced risk of heart disease and death, and may be more effective than focusing solely on the duration of slower walks.

There is a linear dose-response relationship between walking (both pace and volume) and reduced risk of CVD and all-cause mortality, with significant benefits observed even at minimal levels (approx. 3 hours/week).

Start with a manageable goal, such as walking for 3 hours per week at a moderate pace. You will see health benefits immediately, and increasing your pace or duration will further reduce your risk of heart disease and death.

A very low-calorie diet (VLCD) of 624-700 kcal/day for 8 weeks, followed by structured weight maintenance, can induce sustained remission of type 2 diabetes (fasting glucose <7 mmol/L) in approximately 40% of participants, primarily by reducing intrahepatic and intrapancreatic fat and restoring first-phase insulin secretion.

If you have Type 2 Diabetes, significant weight loss through a very low-calorie diet (around 600-700 calories/day for 8 weeks) can potentially put your diabetes into remission, especially if you have had it for a shorter time. This involves stopping diabetes medications under medical supervision, using a structured diet plan, and then maintaining that weight loss. It works by clearing fat from your liver and pancreas, allowing your body to regulate blood sugar normally again.

Increasing food texture (harder, chewier, or more viscous) reduces meal size and improves satiety by slowing eating rate and increasing oral processing time, independent of caloric content.

Make your food harder, chewier, or thicker without adding calories. For example, choose whole fruits over juice, or add thickeners to soups/beverages. This slows your eating rate and increases satiety, helping you eat less without feeling deprived.

Visual cues, particularly portion size and perceived volume, significantly influence food intake and post-meal satiety, often overriding physiological feedback.

Use smaller plates and serve smaller initial portions. Be aware that visual cues like refilling bowls or large packages can trick you into eating more, regardless of your hunger levels.

Preconception optimization of maternal weight, diet, and micronutrient status (specifically folate) is more effective for improving maternal and offspring health outcomes than interventions initiated during pregnancy.

If you are planning to have children, optimize your health now. Focus on achieving a healthy BMI and eating a balanced diet rich in folate (400 mcg/day) before you conceive. Waiting until you are pregnant to start these habits is less effective for preventing issues like excessive weight gain and hypertension.

Lifestyle modification interventions (dietary changes with or without exercise) significantly increase the relative proportion of patients with metabolic syndrome who achieve resolution compared to conventional education or no treatment.

If you have metabolic syndrome, structured lifestyle changes involving diet and/or exercise are significantly more effective at resolving the condition than general health advice. Aim for a structured plan, such as the Mediterranean or DASH diet, combined with moderate exercise (e.g., 150 minutes/week), maintained for at least 6 months.

Weight regain in successful losers is primarily driven by a decline in physical activity (specifically high-intensity exercise) and an increase in dietary fat percentage, rather than an increase in total caloric intake.

Don't just count calories. Monitor your activity levels and fat intake. A drop in exercise intensity and a shift toward higher fat consumption are key predictors of weight regain, even if your total calorie count stays the same.

Consuming 2-3 servings (approx. 48g) of whole grains daily reduces the risk of cardiovascular disease, type 2 diabetes, and certain cancers.

Aim for 2-3 servings of whole grains daily (approx. 48g). This simple dietary shift is strongly linked to a 20-30% reduction in Type 2 Diabetes risk and lower cardiovascular disease risk. Prioritize whole wheat, rye, oats, or barley over refined white flour products to access the protective phenolic acids and fiber concentrated in the bran.

Consumption of sugar-sweetened beverages (SSBs) increases the risk of obesity, type 2 diabetes, and metabolic syndrome by providing unabsorbed liquid calories and promoting de novo lipogenesis and visceral fat accumulation.

To reduce your risk of obesity and metabolic syndrome, limit your intake of sugar-sweetened beverages. Replace them with water, unsweetened coffee, or tea. If you consume fruit juice, limit it to about 4 ounces per day, as it acts like other added sugars. Reducing SSB intake is associated with less weight gain and lower risk of fatty liver.

Dehydration of 2% body weight impairs endurance performance and increases cardiovascular strain in hot environments (>30°C), whereas it may be tolerated without significant performance loss in cold or temperate environments.

In hot weather, drink to match your sweat rate to avoid performance loss and heat injury. In cool or temperate weather, you can safely allow yourself to lose up to 2% of your body weight without expecting a significant drop in performance, which may be more practical than trying to drink large volumes while exercising.

Sodium should be included in fluids consumed during exercise lasting longer than 2 hours or by individuals who lose heavy amounts of sodium (>3-4 g).

If you are exercising for more than 2 hours, or if you are a heavy sweater, add sodium to your drinks. This helps prevent hyponatremia, a dangerous condition caused by drinking too much plain water.

Adopting flexible cognitive restraint (a graduated approach to eating) and reducing emotional eating are critical mediators for achieving 12-month weight loss, whereas maintaining weight loss at 24 months requires high exercise self-efficacy and intrinsic motivation.

To lose weight, focus on flexible dietary restraint (eating moderately without strict rules) and reducing emotional eating. To keep it off, prioritize exercise that you enjoy and believe you can sustain, rather than just forcing yourself through barriers.

Tailoring physical activity interventions to individual motivational drivers (e.g., affiliation for team sports, enjoyment for racing, mastery for racquet sports) significantly improves the likelihood of long-term adherence and sustained participation.

Before committing to a fitness routine, identify what motivates you: social connection, competition, aesthetics, or health? Choose an activity that aligns with that driver (e.g., join a team for social connection, take up tennis for mastery/competition). This alignment is the strongest predictor of sticking with the habit long-term.

Low-load resistance training (25-35 reps to failure) produces muscle hypertrophy equivalent to high-load resistance training (8-12 reps) in well-trained men.

If you want to build muscle but have joint pain or prefer lighter weights, you can still grow by doing 25-35 reps per set until you can't do another rep. Just make sure you are actually pushing to failure, as that is the key driver for muscle growth when the weight is light.

High-load resistance training (8-12 reps) is superior to low-load resistance training (25-35 reps) for maximizing maximal strength gains in well-trained men.

If your main goal is to lift the heaviest weight possible (1RM), you must train with heavier loads (8-12 reps). Lighter weights will build muscle size, but they will not make you as strong as heavy weights do.

Structured, church-based group interventions combining nutrition education and moderate-intensity aerobic activity significantly improve cardiovascular risk profiles (weight, blood pressure, diet) in African American women aged 40+ compared to self-help controls.

For African American women over 40, joining a structured, weekly group program that combines nutrition education with moderate exercise (like walking or water aerobics) is more effective for improving heart health and losing weight than trying to do it alone with pamphlets. The social support and professional guidance are key components of success.

Persistent low energy availability (EA <125 kJ/kg FFM/day) in female athletes causes functional hypothalamic amenorrhea (FHA), impaired bone mineral density, and increased risk of musculoskeletal injuries, collectively known as the Female Athlete Triad.

If you are a female athlete training frequently, ensure you are eating enough to support your activity level. Ignoring this can lead to missed periods, weaker bones, and more injuries, even if you don't have an eating disorder. Use screening tools like the LEAF-Q to check for early signs.

Regular exercise enhances neuroplasticity and growth factor expression (e.g., BDNF), which improves cognitive function, mood, and protects against stress-related brain changes.

Exercise regularly to boost brain-derived neurotrophic factor (BDNF) and improve brain health. This can enhance memory, mood, and protect against age-related cognitive decline.