Browse the evidence

Adding aerobic or combined aerobic-resistance exercise to a hypocaloric high-protein diet improves body composition (greater fat mass loss and fat-free mass preservation) in overweight/obese women with PCOS, but provides no additional benefit for cardiometabolic, hormonal, or reproductive outcomes compared to diet alone.

If you have PCOS and are overweight, a structured hypocaloric high-protein diet is sufficient to improve your heart health, hormones, and fertility markers. Adding exercise won't make these specific health markers improve *more* than the diet does. However, you should still exercise because it helps you lose more fat and keep more muscle, which is crucial for long-term weight maintenance and body composition.

Lifestyle interventions, specifically very low calorie diets (VLCD) leading to significant weight loss, can reverse defects in insulin signaling (PI3K, AS160, PKCλ/ζ) and improve insulin sensitivity in obese nondiabetic individuals.

For obese individuals without diabetes, a structured, short-term very low-calorie diet (600-800 kcal/day) can significantly improve how your muscles respond to insulin. This intervention reverses molecular defects in signaling pathways, leading to a 30% increase in glucose disposal. This suggests that significant weight loss can 'reset' insulin sensitivity at the molecular level.

HMB supplementation enhances skeletal muscle mass, strength, and hypertrophy when combined with resistance or strenuous exercise, particularly in untrained individuals and the elderly.

If you are new to exercise or older, taking 3g of HMB daily alongside your resistance training may help you build muscle and strength faster than training alone. If you are already an elite strength athlete, you likely won't see much benefit from HMB alone. Do not expect muscle growth from HMB if you are sedentary.

Adherence to a Mediterranean Diet (MD) reduces the incidence and severity of metabolic syndrome, type 2 diabetes, and cardiovascular disease by mitigating systemic oxidative stress and chronic low-grade inflammation through the intake of polyphenols, fiber, and unsaturated fatty acids.

Replace processed foods and saturated fats with a diet centered on vegetables, fruits, legumes, nuts, and olive oil. Prioritize fiber-rich foods to support gut microbiota and reduce inflammation. This dietary pattern is a proven strategy to lower the risk of heart disease, diabetes, and metabolic syndrome.

Vitamin D deficiency causes proximal muscle weakness and myopathy, which is reversible with supplementation, independent of bone health status.

If you are experiencing unexplained muscle weakness or frequent injuries, get your Vitamin D levels checked. If you are deficient, supplementation can significantly improve muscle power and function, potentially reducing injury risk. Aim for levels above 30 ng/mL for optimal muscle function.

Higher levels of physical activity are associated with a lower risk of incident obesity, coronary heart disease, and type 2 diabetes in adults.

Engage in regular physical activity to significantly lower your risk of developing obesity, heart disease, and type 2 diabetes. You do not need to be an elite athlete; higher levels of activity correlate with lower risk. Focus on consistency and increasing your overall activity volume over time.

Creatine monohydrate supplementation (5g/day) combined with resistance training significantly enhances fat-free mass and isometric strength gains in older adults compared to resistance training alone.

If you are over 65 and doing resistance training, adding 5 grams of creatine monohydrate daily can help you gain more muscle mass and strength than exercise alone. This is particularly effective for improving leg strength (knee extension) and functional measures like chair stands. It is safe and does not cause significant side effects in this population.

Maintaining or increasing skeletal muscle strength and mass through resistance exercise and adequate protein intake is a primary determinant of healthy aging, reduced mortality, and preserved independence in older adults.

Focus on building and maintaining muscle strength through regular resistance training and consuming sufficient protein (likely higher than the standard 0.8g/kg/day, potentially 1.2-2.0g/kg during illness or for optimal maintenance). This is the most effective way to ensure a long, independent, and healthy life, rather than focusing solely on lifespan extension strategies that ignore muscle function.

Older adults exhibit 'anabolic resistance,' requiring higher doses of dietary protein (specifically leucine-rich protein) per meal to maximally stimulate muscle protein synthesis compared to younger adults.

If you are over 60, aim for at least 1.2-1.5 g of protein per kg of body weight daily, distributed evenly across 3-4 meals. Each meal should contain a substantial amount of high-quality protein (approx 0.6g/kg of lean mass) to overcome age-related anabolic resistance. Combine this with resistance training for best results.

Six sessions of high-intensity interval training (HIT) over two weeks significantly improve maximal oxygen uptake (VO2peak) and endurance performance in previously untrained individuals, primarily through increased skeletal muscle mitochondrial content and respiratory capacity rather than cardiovascular adaptations.

If you are new to exercise, you do not need to spend hours on the bike. Performing just six sessions of high-intensity interval training over two weeks—consisting of repeated 60-second hard efforts with short recovery—can significantly boost your aerobic capacity and endurance. Focus on intensity rather than duration to see rapid results.

Tirzepatide, a dual GIP/GLP-1 receptor agonist, produces dose-dependent reductions in HbA1c (up to 2.4%) and body weight (up to 11.3 kg) in patients with Type 2 Diabetes, with efficacy superior to the GLP-1 receptor agonist dulaglutide.

If you have Type 2 Diabetes, Tirzepatide is a once-weekly injection that significantly lowers blood sugar (HbA1c) and promotes substantial weight loss, outperforming existing GLP-1 drugs like dulaglutide in clinical trials. It works by mimicking two gut hormones (GIP and GLP-1) to improve insulin response and reduce appetite. While gastrointestinal side effects like nausea are common, they are usually mild and can be managed by starting with a low dose and increasing gradually. This treatment is suitable for adults with T2DM, including those already taking metformin.

Consumption of a tart cherry juice blend (providing ~50-60 cherries equivalent per 12oz bottle) taken before and after eccentric exercise significantly reduces strength loss and pain associated with exercise-induced muscle damage compared to a placebo.

To reduce muscle soreness and strength loss after intense workouts, drink 24 ounces of tart cherry juice blend daily, starting 4 days before your workout and continuing for 4 days after. Take 12 ounces in the morning and 12 ounces in the evening. This specific blend has been shown to cut strength loss from 22% down to 4% compared to a placebo.

Regular physical activity, particularly aerobic exercises like Tai Chi and Pilates, improves sleep quality in college students, whereas sedentary behavior and high screen time reduce it.

Incorporate regular aerobic exercise, such as Tai Chi or Pilates, into your weekly routine. Avoid sedentary behavior and excessive screen time, as these are linked to poorer sleep quality.

Structured aerobic and/or resistance exercise training is safe and elicits significant physiological, functional, and psychological adaptations in patients receiving maintenance hemodialysis for end-stage renal disease.

If you are on maintenance hemodialysis, structured exercise is safe and beneficial. You can engage in aerobic training (like cycling or walking) or resistance training, typically 3-4 times a week for 30-60 minutes. Start at a moderate intensity and progress as tolerated. This can significantly improve your physical capacity, muscle strength, and quality of life, and should be integrated into your standard medical care.

Combined aerobic and resistance training produces superior improvements in VO2peak compared to aerobic training alone in hemodialysis patients.

For hemodialysis patients, combining aerobic exercise (like cycling) with resistance training (like weight lifting) yields significantly greater improvements in cardiovascular fitness (VO2peak) than aerobic exercise alone. Aim for a mix of both modalities, 3 times a week, for the best results.

Vegans exhibit a high prevalence of dietary inadequacy for vitamin B12 and iodine when relying solely on food sources, necessitating supplementation or fortified foods to maintain adequacy.

If you follow a vegan diet, you must actively manage your Vitamin B12 and Iodine intake. Food sources alone are often insufficient. Use a B12 supplement (considering absorption limits and dosing frequency) and ensure your iodine sources (like iodized salt or specific supplements, as UK salt is often not iodized) are adequate. Do not assume plant-based diets automatically provide these nutrients.

Ingesting caffeine (2.1–4.5 mg/kg body weight) alongside a carbohydrate-electrolyte solution significantly improves 1-hour time trial cycling performance in well-trained athletes compared to placebo or carbohydrate-electrolyte solution alone.

If you are a trained cyclist, adding caffeine (approx. 2-4.5 mg per kg of body weight) to your carbohydrate drink during a 1-hour time trial will significantly improve your speed. You do not need to worry about dehydration or failing a drug test with these doses. Split your dose: drink some at the start and the rest during the effort.

Accumulating up to 10,000 steps per day is associated with a lower risk of all-cause, cardiovascular disease (CVD), and cancer mortality, as well as reduced incidence of CVD and cancer.

Aim for more steps, but don't obsess over hitting 10,000 if it feels like a chore. The research shows significant mortality and disease risk reductions occur well before that number. Focus on increasing your daily average from your current baseline; every 2,000 steps adds benefit, with the curve flattening around 10,000.

Short-term (3 weeks) low-load resistance training (20% 1RM) combined with blood flow restriction (BFR) induces significant proliferation of myogenic stem cells (MSCs) and myonuclei addition in human skeletal muscle, resulting in substantial myofiber hypertrophy and strength gains.

If you cannot lift heavy weights due to injury or joint issues, try low-load resistance training (20% of your max) combined with Blood Flow Restriction (BFR) cuffs. Perform 4 sets to failure with 30 seconds rest, using a cuff pressure of 100 mmHg. This protocol can stimulate muscle growth and strength gains similar to heavy lifting by triggering stem cell proliferation, provided you train frequently (almost daily) for at least 3 weeks.

HMB supplementation increases lean mass gains by 50-200% and strength by 300% in humans undergoing resistance training compared to unsupplemented subjects, primarily by reducing exercise-related muscle damage and protein breakdown.

If you are resistance training, adding 1.5-3 grams of HMB daily can significantly boost your muscle growth and strength gains compared to training alone. It works by reducing muscle damage and breakdown during exercise.

Weight reduction of 5-10% is the primary and most powerful dietary intervention for treating metabolic syndrome, as it significantly improves insulin sensitivity and corrects associated metabolic abnormalities.

Focus on losing 5-10% of your current body weight. This modest reduction is sufficient to significantly improve insulin sensitivity and metabolic health, often outperforming medication effects. You do not need to reach an 'ideal' weight to see these benefits.

Low muscle mass is a significant predictor of poor clinical outcomes, including higher surgical complications, longer hospital stays, reduced physical function, and shorter survival, across diverse patient populations in inpatient, outpatient, and long-term care settings.

For patients in clinical settings, low muscle mass is a critical risk factor for poor outcomes, regardless of body weight. Healthcare providers should prioritize measuring muscle mass (via CT, DXA, or BIA) over BMI alone to identify at-risk individuals. Interventions should focus on preventing and reversing muscle loss through multimodal approaches, including exercise and nutrition, to improve survival and reduce healthcare costs.

In patients with type 2 diabetes, a very low-calorie diet (VLCD) of 500 kcal/day achieves early improvements in insulin sensitivity and beta-cell function equivalent to Roux-en-Y gastric bypass (RYGB) when matched for the rate and magnitude of weight loss.

For patients with type 2 diabetes, achieving a very low-calorie intake (around 500 kcal/day) for about three weeks can restore insulin sensitivity and beta-cell function just as effectively as gastric bypass surgery, provided the weight loss is rapid and significant. This suggests that the early metabolic 'reset' is driven by the intensity of caloric restriction rather than surgical changes to the gut.

Plant-based diets significantly reduce the risk of chronic diseases (cardiovascular disease, type 2 diabetes, certain cancers) and have a lower environmental impact (greenhouse gas emissions, land/water use) compared to meat-containing diets.

Adopting a plant-based diet offers significant health benefits, including reduced risk of heart disease, diabetes, and cancer, while also being more environmentally sustainable. This makes it a viable long-term strategy for overall health, even if performance benefits are neutral.