Why the Gym Fills Up Every Sunday

Katherine Milkman and her colleagues discovered that Google searches for "diet" spike 82 percent in January, gym attendance jumps 47 percent at semester start, and goal contracts surge 145 percent on New Year's Day. The Fresh Start Effect explains why: temporal landmarks open new mental accounting periods, distancing us from past failures. But the research cuts both ways. Dai's 2018 baseball study found that resets hurt peak performers, erasing good streaks along with bad. The date has no power; the meaning you assign it does.

You'll learn:

- Why the 21st birthday actually decreases gym visits

- How "start doing" goals outperform "stop doing" by 12 points

- Which people a fresh start can actively harm