Ask someone in the weight room to point to their trapezius muscle, or “traps” in gym-speak, and they’ll probably gesture toward the small mounds of muscle nestled in between their neck and shoulders.

If it feels like you’ve been noticing more bodyweight exercises on your social feeds—the kinds of calisthenics exercises your grandparents might have done in gym class—you’re not imagining things.

A collage of images representing the year in chemistry, including strands of DNA, a petri dish, and flasks. Credit: Will Ludwig/C&EN/Shutterstock “2025 will see ...