A review of 65 studies identified how your chronotype might affect productivity. Learn the simple formula for determining your personal peak cognitive window.
Lifting builds a stronger heart muscle. Cardio keeps your arteries elastic and healthy. The research is clear on what you need, and how little of each it actually takes.
Three research-backed findings on where productive time, relational energy, and the capacity for change actually go, and how to stop losing them.
Researchers tested 150 foods for their impact on healthy bacteria in the microbiome. Coffee wasn't just beneficial. It made the biggest difference.
Studies on overeating suggest your hunger isn't just determined by what's on the ingredient label. The real influence might be about how fast certain foods make you eat.
Higher protein intake cuts mortality risk by 27%, including in adults with early-stage kidney disease. Here's what that means for how much you should actually be eating.
How a clear, non-negotiable vision turns hard choices into obvious ones. And why most people skip the step that makes it work.
Muscle power declines faster with age than strength and predicts early death at 6-7x the rate. Learn why power is so important and how to train for it.
The science of decision fatigue, goal complexity, and why simpler approaches to health are also the ones with the strongest evidence.
Foods loaded with polyphenols, omega-rich fats, and carotenoids passed the test. The supplement most marketed for skin did not.
Scientists found that playing board games weekly slowed cognitive decline and reduced the risk of depression by 15%.
Busy parents, 70-year-olds, people fighting cancer — Arnold has watched all of them get stronger and healthier. Here's the three-habit framework he keeps coming back to.
