Browse the evidence

Explosive-type and heavy-resistance strength training can improve Rate of Force Development (RFD) in various populations, primarily by enhancing rapid muscle activation (neural adaptations).

You can improve your explosive power through either heavy resistance training or explosive-style training. The key mechanism for improvement is enhancing your nervous system's ability to activate muscles rapidly.

Physical exercise interventions significantly improve cognitive function in adults older than 50, regardless of baseline cognitive status.

If you are over 50, moving your body is one of the best things you can do for your brain. Aim for at least 45 minutes of moderate exercise most days of the week. This can include walking, swimming, lifting weights, or Tai Chi. You don't need to be an athlete; just keep moving. This applies whether you are healthy or have mild memory issues.

Moderate exercise training (≥5 days/week, 20+ min bouts) significantly reduces the incidence and duration of upper respiratory tract infections (URTI) compared to sedentary behavior.

Aim for at least 20 minutes of moderate aerobic activity, five days a week. This level of activity is proven to cut your risk of getting sick by nearly half compared to being sedentary, and it does so without the immune suppression risks associated with extreme endurance training.

Carbohydrate ingestion (30-60 g/h) during prolonged endurance exercise attenuates post-exercise inflammation and stress hormone elevation.

For workouts lasting longer than 90 minutes, consume 30-60 grams of carbohydrates per hour. This helps manage stress hormones and inflammation, aiding recovery compared to drinking only water.

A population-wide reduction of dietary salt by 3 g per day (approx. 1200 mg sodium) significantly reduces the incidence of coronary heart disease, stroke, and myocardial infarction, and lowers all-cause mortality.

Reduce your daily salt intake by approximately 3 grams (about 1200 mg of sodium). This is a significant public health target, not just a minor tweak. Focus on processed foods, which provide 75-80% of dietary salt. The benefits include fewer heart attacks, strokes, and deaths, and it is cost-saving for the healthcare system. Start gradually if needed, as your taste buds will adapt.

Increased consumption of sweetened beverages is a major contributor to the rise in caloric intake and obesity, particularly among young adults.

Reduce or eliminate sweetened beverages. Replace them with water, unsweetened tea, or other low-calorie options to significantly reduce daily caloric intake without feeling deprived by solid food restrictions.

Lifestyle modification, including diet, physical activity, and behavior therapy, is the cornerstone of obesity management and can lead to significant weight loss and reduced cardiovascular risk.

Lifestyle modification is the primary and most effective way to manage obesity. This involves a combination of diet, physical activity, and behavior therapy. Aim to lose at least 10% of your body weight through these changes. If lifestyle changes alone are not enough, consult a healthcare provider about other options like pharmacotherapy or surgery.

Suboptimal intake of specific dietary factors (high sodium, low nuts/seeds, high processed meats, low seafood omega-3 fats, low vegetables, low fruits, high sugar-sweetened beverages) is associated with approximately 45.4% of cardiometabolic deaths in the US.

To significantly reduce your risk of heart disease, stroke, or type 2 diabetes, prioritize reducing sodium and processed meat intake while increasing consumption of nuts, seeds, seafood omega-3s, vegetables, and fruits. Limiting sugar-sweetened beverages is also critical. These changes collectively address the dietary factors responsible for nearly half of cardiometabolic deaths in the US.

Interrupting prolonged sitting with brief (2-minute) bouts of light- or moderate-intensity walking every 20 minutes significantly reduces postprandial glucose and insulin responses in overweight/obese adults compared to uninterrupted sitting.

If you have a desk job or sit for long periods, do not sit continuously. Stand up and walk lightly or at a moderate pace for just 2 minutes every 20 minutes. This simple break significantly lowers your blood sugar and insulin spikes after meals, offering cardiovascular benefits comparable to a full workout without requiring extra time or high intensity.

Resistance training protocols utilizing moderate repetition ranges (approximately 6-12 reps) optimize muscle hypertrophy by maximizing metabolic stress, whereas high-repetition training is inferior unless artificial ischemia is applied.

To maximize muscle growth, aim for sets of 6-12 repetitions. This range balances mechanical tension with metabolic stress, which is crucial for hypertrophy. Avoid very high repetitions (15+) unless you are using special techniques like blood flow restriction, as they are generally less effective for building mass.

Low-intensity resistance training combined with vascular occlusion (blood flow restriction) produces hypertrophic gains similar to high-intensity training without occlusion.

If you cannot lift heavy weights due to injury or limitation, consider using blood flow restriction (BFR) with light weights (around 50% of your max). This method can build muscle size comparable to heavy lifting by creating metabolic stress.

Acute negative energy balance via a very-low-energy diet (approx. 600 kcal/day) reverses type 2 diabetes by normalizing beta-cell function and hepatic insulin sensitivity, associated with a rapid reduction in liver and pancreatic fat.

If you have recently been diagnosed with type 2 diabetes, your condition may not be permanent. This study suggests that adopting a strict, very-low-calorie diet (around 600 calories per day, supervised) can rapidly reduce fat in your liver and pancreas, potentially restoring your body's ability to regulate blood sugar and insulin normally. This is not a standard weight-loss diet but a specific medical intervention that should be undertaken with professional supervision.

High-intensity progressive resistance training is the optimal prescription for treating sarcopenia and improving aerobic capacity in older adults, often outperforming moderate-intensity aerobic training in specific metrics.

If you have muscle loss (sarcopenia), you need to lift heavy weights progressively to rebuild strength and even improve your heart health as much as moderate cardio does. Don't be afraid of resistance training; it is essential for fighting muscle loss and can be just as good for your cardiovascular system as moderate walking if done with high intensity.

Exercise serves as a therapeutic agent and preventative medicine that can substitute for or reduce the need for potentially inappropriate medications (PIMs) such as antidepressants, anxiolytics, and insomniacs in older adults, thereby reducing adverse drug events like falls and cognitive impairment.

If you are taking medications for depression, anxiety, or insomnia, talk to your doctor about whether exercise could help reduce your dose. Exercise is a proven treatment that can improve your mood and sleep without the side effects of these medications, such as increased risk of falls or confusion.

Regular physical activity (defined as walking or cycling for 2 or more hours per week) reduces the risk of hospital admission for COPD and all-cause mortality in patients with chronic obstructive pulmonary disease.

If you have COPD, aim to walk or cycle for at least 2 hours a week. You do not need intense gym workouts; light to moderate activity like walking is sufficient. This level of activity is associated with a significant reduction in hospital visits and death. Start slowly and focus on consistency rather than intensity.

For healthy adults, 10,000 steps per day is a reasonable target that aligns with public health guidelines for moderate-to-vigorous physical activity (MVPA), whereas less than 5,000 steps/day indicates a sedentary lifestyle.

Aim for 10,000 steps a day. This isn't just a random number; it roughly equals 30 minutes of brisk walking (where you take at least 100 steps per minute) on top of your normal daily movement. If you currently take 5,000 steps, try adding 2,000-2,500 steps gradually. Ensure those extra steps are taken in chunks of at least 10 minutes to count toward your health benefits.

Adding exercise to behavioral weight loss interventions improves both short-term and long-term weight loss outcomes compared to diet alone, although it does not completely prevent weight regain.

Include exercise in your weight loss plan. It helps you lose more weight initially and helps you keep more of it off in the long run compared to dieting alone. While it might not stop all weight regain, it significantly improves your odds of success.

Weight loss of up to 16% of original body weight is sufficient to improve beta-cell function and insulin sensitivity in adipose tissue, liver, and skeletal muscle by correcting dysregulated gene expression related to lipid and oxidative stress.

Losing up to 16% of your body weight through gradual lifestyle changes (diet and exercise) can significantly improve your body's sensitivity to insulin and improve beta-cell function. This reduction in weight helps reverse the metabolic dysfunction associated with obesity.

Adherence to health-promoting dietary patterns (Mediterranean, DASH, MIND, Nordic, or traditional Asian) reduces the risk of non-communicable diseases (NCDs) including cardiovascular disease, cancer, and diabetes compared to Western dietary patterns.

Adopt a dietary pattern rich in plant-based foods (fruits, vegetables, whole grains, legumes, nuts) and low in processed meats, saturated fats, and refined sugars. You do not need to follow one specific named diet; choose a pattern (like Mediterranean, DASH, or MIND) that fits your culture and preferences. Key actions: eat fruits and vegetables daily, choose whole grains over refined, use healthy oils (olive, rapeseed), and limit red/processed meats. Combine this with regular physical activity and adequate sleep for maximum benefit.

Dietary intake of fermentable fibers and prebiotics boosts the abundance of SCFA-producing bacteria (e.g., Bifidobacteria, Lachnospiraceae), leading to increased production of short-chain fatty acids (SCFAs) which regulate gut homeostasis, immunity, and metabolic health.

To improve your gut health and metabolic markers, focus on eating foods that feed your good bacteria. This means consuming prebiotic fibers found in foods like garlic, onions, bananas, oats, and resistant starches (like cooled potatoes or rice). This fosters bacteria that produce beneficial short-chain fatty acids, which support your gut barrier, immune system, and metabolism. Direct SCFA supplements have shown mixed results in humans, so diet is the primary lever.

Dietary patterns rich in whole grains, vegetables, fruits, and fish are associated with lower circulating concentrations of inflammatory markers, while saturated fats, trans fats, and high glycemic loads promote inflammation.

To reduce inflammation, prioritize whole grains, vegetables, fruits, and fish. Limit saturated and trans fats, and manage carbohydrate quality to avoid high glycemic spikes. This dietary pattern directly lowers inflammatory markers associated with obesity and metabolic disease.

Low-volume sprint interval training (SIT) produces similar improvements in skeletal muscle oxidative capacity, buffering capacity, and exercise performance as high-volume endurance training (ET) despite a ~90% lower total training volume.

If you are short on time, you can achieve similar fitness and muscle adaptations to long endurance sessions by doing short, all-out sprints. Specifically, perform 4-6 repeats of 30-second maximal cycling efforts with 4-minute rest periods, three times a week for two weeks. This takes about 2.5 hours total over two weeks, compared to 10.5 hours for traditional endurance training, yet yields similar improvements in your body's ability to use oxygen and sustain effort.

Reallocating time from sedentary behavior (SB) to moderate-to-vigorous physical activity (MVPA) significantly improves cardiometabolic health markers, with MVPA being the strongest positive predictor of health outcomes.

Prioritize moving time from sitting (SB) to moderate-to-vigorous activity (MVPA). Even small shifts, like 10 minutes, can improve waist circumference and other health markers. MVPA is the most impactful behavior for health; reducing sedentary time by replacing it with MVPA is more effective than just adding light activity.

Replacing sedentary behavior (SB) with light-intensity physical activity (LIPA) is associated with more favorable diabetes risk markers.

If you cannot perform vigorous exercise, replacing sitting time with light activity (like walking slowly) can still improve diabetes risk markers. It is better to be lightly active than sedentary.