Browse the evidence

Cumulative exposure to rotating night shift work is positively associated with increased BMI, waist circumference, and abdominal obesity in female nurses and midwives.

If you work rotating night shifts, your cumulative exposure matters. More night shifts and longer hours are linked to higher BMI and waist circumference. While you may not be able to change your schedule, being aware that this occupational factor contributes to weight gain can motivate you to prioritize sleep quality and monitor your diet, particularly around the clock cycle.

The ACTN3 R577X polymorphism significantly influences susceptibility to exercise-induced muscle damage, with XX homozygotes (lacking alpha-actinin-3) exhibiting greater structural damage and slower recovery following strenuous eccentric exercise compared to R-allele carriers.

If you have the ACTN3 XX genotype, you are genetically predisposed to greater muscle damage and slower recovery after intense eccentric exercises (like heavy downhill running or deep squats). To train effectively, you should prioritize gradual progression, allow for longer recovery periods between intense sessions, and consider incorporating more stretch-shortening cycle movements (like jumping) which may benefit from your more elastic Z-line structure, while being cautious with pure, maximal eccentric loads.

The ACTN3 XX genotype may offer a performance advantage in stretch-shortening cycle (SSC) movements due to a more elastic Z-line, potentially storing and releasing more elastic energy compared to R-allele carriers.

If you have the ACTN3 XX genotype, you might find that plyometric exercises (like jumping) feel more natural and efficient than pure strength exercises. Focus on training modalities that utilize stretch-shortening cycles, as your muscle structure may be better suited for these movements. This can help you maximize your athletic potential while minimizing the risk of injury associated with pure eccentric loading.

Moderate-intensity aerobic exercise training can reverse impaired glucose tolerance and type 2 diabetes status in chronic stroke survivors.

If you have diabetes or pre-diabetes after a stroke, regular moderate exercise (like walking on a treadmill) for 6 months can significantly improve your blood sugar control. It may even reverse the diagnosis in more than half of cases, reducing your risk of another stroke.

Unilateral aerobic exercise training (exercising only the paretic leg) improves vascular function and blood flow in the hemiparetic limb of stroke survivors.

Exercising only your weaker leg can improve blood flow and vessel health in that specific leg. This might be a helpful addition to your routine, especially if you have significant weakness on one side.

Disuse atrophy exhibits fiber-type specificity, with Type I (slow-twitch) fibers atrophying faster and to a greater degree than Type II (fast-twitch) fibers during prolonged disuse.

During long periods of immobilization, your slow-twitch muscles (often in the calves and postural muscles) may lose size and strength faster than your fast-twitch muscles. This is why calf atrophy is often noticeable early in bed rest or casting.

Gut microbiota manipulation via antibiotics, prebiotics, or probiotics improves metabolic parameters (insulin resistance, inflammation, fat mass) in animal models of obesity and NAFLD, though human data remains scarce and inconclusive.

While animal studies show that changing gut bacteria (via antibiotics, prebiotics, or probiotics) can improve metabolic health, human evidence is currently insufficient to recommend these as standard treatments. Focus on a balanced diet to support a healthy microbiome rather than seeking specific microbiota-altering supplements without medical guidance.

Participation in community-based social dancing (ballroom or folk) for 12 months reduces fall incidence and improves cognitive function in older adults, with efficacy potentially matching or exceeding standard balance training.

Older adults can reduce their risk of falling by joining community social dance classes (like ballroom or folk) twice a week. This activity improves balance, cognitive function, and social engagement, offering a sustainable alternative to repetitive exercise routines.

NRPT supplementation (specifically the double dose) improves physical mobility markers, including chair stand tests and 6-minute walk distance, in older adults.

If you are looking to support physical mobility, the double dose of NRPT (500mg NR + 100mg PT) showed improvements in walking distance and chair stand tests in this study. However, this effect was not seen at the standard dose, so the higher dose may be necessary for this specific benefit.

Canagliflozin (100 mg/day) reduces epicardial adipose tissue (EAT) thickness in patients with type 2 diabetes over 6 months, independent of glucose lowering.

If you have type 2 diabetes, taking 100mg of canagliflozin daily for 6 months was shown to reduce the fat surrounding your heart (epicardial fat) by about 2mm. This reduction happened regardless of how much you lost weight overall, suggesting a direct benefit to heart health.

SARS-CoV-2 infection is associated with a significant reduction in exercise capacity (peak VO2), particularly in individuals with Long COVID symptoms, with mechanisms including deconditioning, dysfunctional breathing, chronotropic incompetence, and impaired peripheral oxygen extraction.

If you have Long COVID and feel exhausted by activity, standard 'push through it' advice may be harmful. Get a Cardiopulmonary Exercise Test (CPET) to identify if your limitation is due to deconditioning, heart rate issues (chronotropic incompetence), or breathing problems. Treatment should be tailored to the specific mechanism found, rather than generic exercise.

Higher consumption of ultra-processed foods is significantly associated with increased body mass index (BMI), waist circumference, and higher odds of obesity and abdominal obesity in Australian adults.

Focus on reducing the proportion of ultra-processed foods in your diet. This study links higher UPF intake to higher BMI and waist circumference, independent of physical activity. Try to replace packaged snacks, sugary drinks, and ready meals with whole or minimally processed foods to improve satiety and reduce obesity risk.

Post-diagnosis moderate-intensity recreational physical activity (approx. 3 hours/week) is associated with a 24-67% reduction in total mortality and 50-53% reduction in breast cancer-specific mortality in women with breast cancer.

If you have breast cancer, aim for about 3 hours of moderate activity (like brisk walking) per week. This is associated with significantly lower risks of dying from breast cancer or other causes. Start slowly, ensure it is safe for your specific condition (e.g., no lymphedema exacerbation), and ask your oncologist for a referral to a certified cancer exercise trainer to get a tailored plan.

Adherence to a Mediterranean diet supplemented with extra-virgin olive oil significantly reduces the incidence of breast cancer in women.

Incorporate extra-virgin olive oil into your daily diet as a primary fat source. This is particularly beneficial for women, as it is associated with a significantly lower risk of breast cancer when consumed as part of a Mediterranean diet.

Tart cherry juice supplementation increases circulating melatonin levels, improves total sleep duration, and enhances sleep efficiency in healthy adults.

Drink 60 mL of tart cherry juice concentrate daily, split into two servings. This natural source of melatonin and anti-inflammatory compounds has been shown to increase total sleep time by over 30 minutes and improve sleep efficiency. It may also help reduce muscle soreness and inflammation after intense exercise.

Long-term pharmacotherapy for obesity (specifically fenfluramine-phentermine combination) produces modest net weight loss (2-10 kg) and improves the likelihood of losing >10% body weight, but weight loss plateaus by 6 months and significant regain occurs upon discontinuation.

Long-term medication can help you lose 2-10 kg and makes it more likely you'll lose over 10% of your body weight, but it is not a cure. You must combine it with diet and exercise. The weight loss plateaus after 6 months, and if you stop the medication, you will likely regain the weight. It is most useful for carefully selected patients who have comorbidities and have struggled with lifestyle changes alone.

Dairy products provide a synergistic anti-obesity effect beyond elemental calcium, likely due to bioactive compounds in the whey fraction.

If you tolerate dairy, include 3-4 servings of low-fat dairy daily during weight loss. This provides synergistic benefits from whey proteins and calcium that are not found in calcium supplements alone.

Adults with inflammatory bowel disease (IBD), particularly Crohn's disease, exhibit significant alterations in body composition characterized by reduced fat-free mass and fat mass, which are often masked by normal or elevated BMI.

If you have IBD, do not rely on BMI alone to gauge your health. A normal BMI can hide significant loss of muscle and fat mass. Seek body composition analysis (like DXA or BIA) to detect these hidden deficits, as they impact bone health and quality of life, even if you are not 'underweight' by standard charts.

Increasing adherence to plant-based dietary patterns over time is associated with a reduced risk of type 2 diabetes and a marginally lower risk of mortality.

Improving your diet to include more plant-based foods over time can lower your risk of type 2 diabetes and may slightly reduce your risk of death.

Abrupt reduction in physical activity (specifically step counts to <1,500/day) in older adults causes rapid loss of leg fat-free mass (approx. 4% in 14 days) and muscle strength (approx. 8% in 2 weeks), leading to anabolic resistance and worsened glucose handling.

If you are an older adult or care for one, do not assume that staying home during a lockdown is physically neutral. Inactivity causes rapid muscle loss and metabolic issues. You must actively break up sitting time with light strolling, standing, or household chores, and perform resistance exercises at home to maintain muscle mass and strength.

High total fat intake has little influence on vascular function independent of fatty acid composition, whereas single high-fat meals acutely impair endothelial function compared with low-fat meals.

Focus on the type of fat you eat rather than just cutting total fat. While a single high-fat meal might temporarily stress your blood vessels, your long-term vascular health is determined by whether you consume saturated fats (which are harmful) or unsaturated fats (which are beneficial).

Probiotics (specifically Lactobacillus and Bifidobacterium strains) improve gastrointestinal health by modulating the immune system, enhancing epithelial barriers, and suppressing pathogen adhesion.

To support gut health, consider incorporating probiotic-rich foods or supplements containing Lactobacillus or Bifidobacterium strains. These microbes help maintain the gut barrier and support immune function. If you are immunocompromised, consult a doctor first to ensure the specific strain is safe for you.

Twelve weeks of progressive overload resistance training (80-85% 1RM, 3x/week) increases muscle strength and oxidative capacity in patients with mitochondrial myopathy caused by single, large-scale mtDNA deletions, likely by stimulating satellite cell activation and shifting wild-type mtDNA to mature muscle fibers.

If you have mitochondrial myopathy caused by large-scale DNA deletions, a supervised resistance training program (3 days/week, 80-85% of your max lift) can safely improve your strength and muscle energy efficiency. The key is progressive overload, which stimulates muscle repair and may help your body use healthier mitochondria. Always start with a warm-up and ensure proper technique to avoid injury.

Flywheel inertial training (FIT) provides an eccentric overload stimulus dependent on concentric velocity and inertial load, but its effectiveness is highly dependent on user technique and training status.

If using a flywheel device, focus on generating high concentric velocity to maximize eccentric overload. Ensure proper technique to decelerate the flywheel effectively. Be aware that results may vary based on your training status.