Browse evidence-based analysis of health-related claims and assertions
If you do the same total amount of weightlifting work, lifting heavy weights a few times or lighter weights more times gives about the same muscle growth in the chest for beginners doing bench press, showing that the total work matters more than how many reps you do.
Causal
When men who already lift weights do lots of reps with lighter weights, their muscles produce more lactic acid buildup than when they lift heavy weights for fewer reps, both right away and after two months of training.
Quantitative
For men who lift weights regularly, the body's testosterone reaction after workouts was about the same whether they did short, intense sessions or longer, higher-volume ones, and this didn't really change over 8 weeks of training.
Descriptive
For men who already lift weights, doing either high-intensity or high-volume workouts for 8 weeks didn't make a big difference in leg strength or muscle size.
When men who lift weights start training, doing more reps with lighter weights causes a bigger short-term boost in certain hormones compared to lifting heavy weights for fewer reps. But this hormone boost gets smaller the longer they keep training.
Lifting heavy weights with fewer reps and longer breaks makes your arms stronger and bigger faster than doing more reps with lighter weights and shorter breaks, especially for guys who already work out.
Whether you lift heavy weights for a few reps or lighter weights for more reps until you can't do any more, both ways make your thigh muscles grow about the same amount in people who already work out.
Lifting lighter weights many times until you can't do more improves muscle endurance better than lifting heavy weights just a few times, especially for people who already work out.
Lifting heavy weights for just a few reps makes you stronger in exercises that work one muscle at a time, more than lifting lighter weights for many reps, especially if you already work out regularly.
Lifting lighter weights many times until you can't do more builds muscle strength just as well as lifting heavy weights a few times until you can't do more, for people who already work out.
Creatine HCl supplementation in postmenopausal women improves physical function.
Assertion
Creatine HCl supplementation in postmenopausal women improves muscle strength.
Creatine HCl supplementation in postmenopausal women improves bone mineral density.
A carnivore diet maintains iron homeostasis, with ferritin levels within the optimal range to prevent both deficiency and toxicity.
A carnivore diet results in low systemic inflammation, evidenced by optimal triglyceride levels and complementary blood markers.
The association between saturated fat, cholesterol, and heart disease was established through biased studies funded by the sugar industry, lacking full data integrity.
Elevated LDL cholesterol levels are not associated with increased heart disease risk, supported by epidemiological data and studies contradicting the lipid hypothesis.
Electrolyte imbalances during low-carbohydrate diets lead to dehydration and altered liver and kidney enzyme levels, which can be corrected with proper electrolyte supplementation.
A carnivore diet maintains optimal liver function, as indicated by normal levels of bilirubin, alkaline phosphatase, and GGT, with ALT elevations attributable to external factors like alcohol.
Eating a lot of protein doesn't hurt your kidneys, and this is shown by normal test results for kidney health.
Low carbohydrate intake does not impair thyroid function, as indicated by normal thyroid-stimulating hormone levels.
A carnivore diet preserves testosterone levels during caloric restriction by providing adequate saturated fats necessary for hormone synthesis.
Comparison
When you have very low body fat and eat fewer calories, your body lowers testosterone levels to save energy for staying alive instead of making babies.
Allulose consumption attenuates the glycemic impact of high-carbohydrate meals by improving metabolic function and reducing blood sugar spikes.