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With the recent replication crisis in psychology, I would want to see this repeated to see whether it holds up to scrutiny.

It just seems "too good to be true", and with a sample size of 29, it could be.

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>too good to be true

I am not sure that regularly thinking about exercises is easier than actually doing these exercises.

I can't find the link right now, but there was a similar study that found this effect for golf. The study had 3 groups: one control group that did nothing, one group that spent time thinking about playing golf, and one group that actually played. At the end of the study, the "actually played" group had the most improvement, and the "thinking" group improved almost as much as the "actually played" group.

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