Explore Journal

Water-Soluble Vitamins: Why “You’ll Just Pee Out the Extra” Is Too Simple

Water-soluble vitamins differ in absorption and storage, so urinary excretion does not guarantee that excess supplement doses are harmless.

The 10% Running Rule Sounds Safe, but Does the Evidence Support It?

The 10% running rule cannot guarantee injury prevention, and evidence about single-run distance increases does not establish a safe weekly mileage rule.

How Exercise Progress Can Show Up without Much Change in Weight

Exercise can improve health and fitness measures that a scale cannot capture, so body weight alone cannot show the full response to training.

What Counts as Dietary Fiber? How FDA Rules Apply to Naturally Occurring and Added Fibers

Added fibers count on U.S. nutrition labels through specific regulatory paths, so resisting digestion alone does not make every ingredient qualify.

How Training Load Affects Strength and Muscle Growth Differently

Heavy weights have a clearer advantage for maximal strength, while muscle growth can occur across a broad range of resistance-training loads.

Short on Training Time? How to Maintain Fitness with Less Exercise

Reduced training can preserve some fitness measures for a time, but maintaining endurance or strength depends on which parts of the training dose remain.

Do Women Need Different Recovery Nutrition?

Recovery nutrition research in female athletes remains too limited to justify rigid menstrual-cycle diets, despite real hormonal differences.

How Your Body Produces Energy during Exercise?

ATP regeneration draws on overlapping energy pathways whose contributions shift with exercise demands, keeping muscle work supplied with usable energy.

Dehydration Makes It Harder to Stay Cool during Exercise

Dehydration can strain circulation and reduce cooling during exercise, adding to the challenge of releasing heat in demanding conditions.

Flexibility Matters Even More as You Age

Flexibility can decline unevenly with age, making enough joint movement for everyday tasks more useful than seeking the greatest possible range.

Why Being Fast in Sport Is More than Just Speed

Agility adds perception and decision-making to movement, explaining why straight-line sprint speed does not fully predict performance in changing play.

Carbohydrates Aren’t Just Fuel

Carbohydrate metabolism supplies more than immediate energy, providing glucose-derived material that cells can store or use to build molecules.