In partnership with
🏋Check your fitness knowledge with our daily challenge! 👟
What best describes concentric and eccentric muscle actions during resistance training?
👇Click (or tap) your answer to reveal the correct choice.👇
Smart starts here.
You don't have to read everything — just the right thing. 1440's daily newsletter distills the day's biggest stories from 100+ sources into one quick, 5-minute read. It's the fastest way to stay sharp, sound informed, and actually understand what's happening in the world. Join 4.5 million readers who start their day the smart way.