10x tasks are tasks that are going to have a high and direct impact on your bigger goal. Considering exercising could be a little confusing. If you take a bigger goal like physical health, for example, your 10x tasks could be doing HIIT regularly, as that might have the most impact on your goal. Or maybe picking a stretching routine that is going to have a high impact on your flexibility.

10x tasks basically are tasks that have 10x the value of any normal task, focusing on efficiency and not just doing things to stay busy.

Hope that makes sense, thanks for reading!