Browse the evidence

Adopting a Mediterranean diet and maintaining adequate protein intake (1.1–1.2 g/kg/day) are essential public health strategies to prevent chronic diseases, sarcopenia, and functional decline in older adults.

To age healthily, prioritize a Mediterranean-style diet rich in plants, fish, and olive oil, and ensure you are eating enough protein—specifically 1.1 to 1.2 grams per kilogram of your body weight daily. This higher protein target is crucial for preventing muscle loss (sarcopenia) and maintaining your ability to live independently. Combine this with regular physical activity, including resistance and balance exercises, to support your physical and cognitive health.

Low-intensity walking (45% HRR) combined with leg blood flow restriction (BFR) at 160-200 mmHg induces significant thigh muscle hypertrophy and strength gains in older women, whereas the same walking intensity without BFR does not.

If you are an older adult looking to build leg muscle but find heavy weights difficult or painful, try walking on a treadmill at a moderate pace (where you can still talk, roughly 45% of your max heart rate reserve) while wearing specialized blood flow restriction cuffs on your thighs. The cuffs should be tightened to a pressure between 160-200 mmHg. Do this 4 days a week for 10 weeks. This method has been shown to increase thigh muscle size and strength in older women, offering a low-impact alternative to heavy resistance training.

Bariatric surgical procedures (Roux-en-Y gastric bypass, laparoscopic adjustable gastric banding, and biliopancreatic diversion/duodenal switch) provide substantial and durable weight loss (>45% excess weight loss) that persists for 10 to 20 years, significantly outperforming non-surgical medical therapy.

If you are considering bariatric surgery, understand that modern procedures like gastric bypass and banding are not short-term fixes. They provide substantial, durable weight loss (often 45-75% of excess weight) that lasts for 10-20 years. While reoperation rates exist, they have decreased with better techniques. Compared to lifestyle changes alone, which rarely maintain significant weight loss beyond a few years, surgery offers a significantly more effective long-term solution for obesity.

Laparoscopic Adjustable Gastric Banding (LAGB) provides durable weight loss (~49% EWL) over 20 years, but is associated with high reoperation rates that have decreased with improved band design and surgical technique.

If you choose LAGB, be prepared for long-term commitment to aftercare and potential adjustments. While the initial reoperation rates were high, modern techniques have significantly improved safety and reduced complications. The weight loss is durable, lasting up to 20 years, making it a viable option if you are willing to manage the device and follow-up.

Combining semaglutide with lifestyle interventions (diet and exercise) reduces the risk of hypoglycemia and improves triglyceride levels compared to semaglutide alone, despite potentially lower absolute weight loss goal achievement in the short term.

If you are taking semaglutide, do not skip lifestyle changes. Combining the medication with diet and exercise significantly reduces your risk of hypoglycemia and improves your triglyceride levels. While you might see quick weight loss without lifestyle changes, the long-term health benefits and safety profile are superior when you combine the drug with healthy habits.

Higher nut consumption is associated with a significantly lower risk of all-cause mortality, cardiovascular disease (CVD) mortality, coronary heart disease (CHD) mortality, and sudden cardiac death.

Incorporate nuts into your diet regularly. This meta-analysis of large cohort studies links higher nut intake (highest quantile vs. lowest) with an 19% lower risk of dying from any cause and a 27% lower risk of dying from heart disease. You do not need to eat extreme amounts; simply ensuring you are in the highest consumption group compared to non-consumers or low consumers appears protective.

High consumption of ultra-processed foods is associated with increased risk of obesity, metabolic syndrome, and all-cause mortality in adults.

Limit ultra-processed foods to reduce your long-term risk of obesity, metabolic syndrome, and early mortality. Focus on whole foods for better health outcomes.

A personalized postprandial-targeting (PPT) diet, which uses machine learning to predict individual glycemic responses based on clinical and microbiome data, significantly improves glycemic control and metabolic health in newly diagnosed type 2 diabetes (T2DM) patients compared to a standard Mediterranean-style (MED) diet.

For newly diagnosed T2DM patients, a standard Mediterranean diet may not be sufficient. A personalized diet that predicts your specific blood sugar response to foods (using your microbiome and health data) is significantly more effective at lowering blood sugar and achieving remission than standard dietary advice. This approach requires technology (CGM and an app) but offers a path to diabetes remission (61% of participants in the long-term study) that standard diets do not guarantee.

Ultra-processed foods contribute to chronic disease through specific mechanisms including gut dysbiosis from additives (e.g., carrageenan, CMC), exposure to endocrine disruptors from packaging (BPA, phthalates), and formation of neoformed compounds (acrylamide, PAH) during high-heat processing.

Be aware that UPF contain additives and packaging chemicals that may disrupt gut health and hormones. Reducing UPF intake reduces exposure to these specific risks.

Hypertrophy (muscle size increase) and strength gains are not strictly coupled; individuals can gain strength without significant muscle growth, and vice versa, due to neural and coordination adaptations.

Do not assume that muscle size is the only driver of strength. You can become stronger through improved technique, coordination, and neural efficiency even if your muscle size stays the same. Conversely, gaining muscle size does not guarantee proportional strength gains, especially in complex movements.

Plyometric training and high-speed running exposure help maintain strength and reduce injury risk during detraining by providing neural stimuli and eccentric loading.

Include plyometric exercises and high-speed running in your routine to maintain neural adaptations and strength, especially if heavy weights are not available.

Carriers of the FTO rs9939609 A allele have a significantly increased risk of metabolic syndrome, primarily driven by higher rates of depressed HDL cholesterol and increased waist circumference.

If you carry the FTO rs9939609 A allele, you have a genetically higher baseline risk for metabolic syndrome, specifically regarding belly fat and cholesterol levels. This is not a life sentence, but it is a signal to prioritize waist circumference management and lipid health through diet and exercise more proactively than someone without the variant.

Ketogenic diets may lead to a loss of fat-free mass (FFM) in resistance-trained individuals, whereas they preserve FFM more effectively in endurance-trained individuals compared to resistance training.

If you lift weights, be aware that a ketogenic diet might cause you to lose some muscle mass. If you do endurance sports, you might preserve muscle better. Monitor your strength and adjust protein intake if you notice performance or muscle decline.

Genetic predisposition for higher LDL-C limits the magnitude of LDL-C reduction achieved through a personalized lifestyle coaching program compared to those with average or lower genetic risk.

If you have a family history of high cholesterol, lifestyle changes like diet and exercise will still help lower your numbers, but you might not see as big a drop as someone with no family history. This doesn't mean the effort is wasted; it just means you may need to be more consistent or combine lifestyle changes with medical treatment if your numbers remain high. Don't let your genetics discourage you from making healthy choices.

Internal attentional focus (focusing on the muscle) increases muscle activation and hypertrophy in some muscles (e.g., biceps) but may decrease strength and efficiency compared to external focus (focusing on the movement).

Use internal focus (thinking about the muscle) when you want to maximize hypertrophy in specific muscles, especially if you are experienced. However, be aware that it may reduce your strength and efficiency. For strength and power goals, external focus (thinking about the movement) is often superior.

Periodized resistance training (linear or undulating) appears equally effective as non-periodized training for enhancing skeletal muscle hypertrophy in untrained populations, but its necessity for trained individuals remains unclear.

If you are new to resistance training, you do not need a complex periodized plan to build muscle. Non-periodized training yields similar hypertrophy results. Periodization may become relevant only after you have gained significant training experience, though current research is inconclusive on this point.

Low-load resistance training to failure (30% 1RM) can simultaneously increase both ribosome and mitochondrial biogenesis, challenging the strict competition paradigm.

If you cannot lift heavy due to injury or preference, lifting light weights (30% 1RM) to failure for 10 weeks, 3 times a week, can build muscle and mitochondria just as effectively as heavy lifting, provided you go to failure.

Practicing the strength test (one maximal repetition per set) and minimal dose eccentric resistance exercise are emerging concepts that show promise for increasing muscle strength but require further ecological validation.

While promising, these strategies (maximal single reps or eccentric-only) are still being validated for real-world use. Stick to standard minimal doses (Weekend Warrior or Single-Set) until more evidence is available.

High intake of ultra-processed foods (UPFs) is associated with increased risk for obesity and cardiometabolic diseases (CMD), though causal mechanisms remain to be fully established.

While observational studies link high UPF intake to obesity and CMD risk, the exact mechanisms are complex. Focus on reducing intake of foods high in added sugars, sodium, and low in fiber, as these are common in UPFs. Be aware that 'processed' does not always mean 'unhealthy', but UPFs often contribute to excess energy intake.

Higher gut microbiota plasticity (variability in composition) is correlated with sustained 12-month weight loss, but the specific timing and diet interaction differ: pre-diet daily plasticity predicts success on low-fat diets, while plasticity over the first 10 weeks of intervention predicts success on low-carb diets.

If you are trying to lose weight, your gut microbiome's ability to change (plasticity) might predict success. For low-fat diets, higher daily variability before starting might help. For low-carb diets, a larger shift in your microbiome during the first 10 weeks might predict better long-term results. This is not a diagnostic tool yet, but suggests that individual metabolic flexibility, reflected in gut changes, matters.

Pre-diet daily gut microbiota plasticity is significantly higher in very successful weight lossers on a low-fat diet compared to unsuccessful losers, but this correlation is not observed for low-carb diets.

If you are starting a low-fat diet, your gut's natural day-to-day variability might predict how well you will do. Those with higher variability before starting tended to lose more weight. This is not a reason to avoid low-fat diets, but a hint that individual gut dynamics matter.

Post-exercise cooling (e.g., cold water immersion) applied in the early recovery phase (< 1 hour) improves fatigue resistance following endurance exercise in hot conditions and may enhance maximal strength recovery after resistance exercise.

If you train in the heat or do heavy lifting, a 10-30 minute cold water immersion (5-20°C) immediately after your session can help you recover strength and fatigue resistance faster. However, avoid this if you just did sprint intervals, as it may hurt your power output for the next session.

Single application of cooling has generally no effect on recovery during the 24–72 hour period following resistance and endurance exercises, though it may benefit neuromuscular function recovery 24–48 hours after sprint exercise.

If you have a competition or hard workout 24-72 hours later, cold water immersion after your initial session won't significantly help you recover from resistance or endurance training. It might help if you did sprint intervals, but don't rely on it for general late recovery.

Current standard-of-care obesity treatments (lifestyle, pharmacotherapy, surgery) exhibit high variability in weight loss outcomes, necessitating a precision medicine approach based on biological markers to predict individual response.

Standard obesity treatments (diet, drugs, surgery) do not work equally for everyone. The paper argues that future care will use biological markers (genetics, microbiome, etc.) to predict who will respond to which treatment, moving away from a 'one-size-fits-all' BMI-based approach.