Dit boek is in hantlieding dy't jo leart hoe't jo sterke wilskr?ft krije kinne s?nder ynspanningen te ynvestearjen. Guon ienf?ldige, mar heul nuttige oefeningen binne opnommen om jo praktyske learen tegearre mei de teoretyske te meitsjen. Nim jo tiid om de ynh?ld en oefeningen troch te gean.
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