What are the limits to it ? Exceptions etc. Context i saw vsauces " power of suggestions " video. Is the video scripted or was the kids conditions just not real like i can understand the girls condition may be cured through placebo but come on adhd and migraines immediatly cured ?
Additionally, working out causes muscle micro tears (from what I understand), which is part of the mechanism for building muscle. Like you said, no amount of imagination will produce the physical effects of exercise.