Research case studies

Early behaviors predicted who stayed, the models improved retention prediction by 23%, and the team acted on the recommendations.

People learned where spending more paid off, and a model of that learning explained their choices far better than the standard one.

Asked in the moment, people named more than tired muscles, and their reasons differed between exercises.

Certified coaches misjudged how many repetitions a lifter had left by almost five early in a set, and experience barely helped.

The most-used rating scale in exercise science measures different things in different studies, and small choices in how the question is asked explain why.