The Dutch midfielder endured a tough debut season after joining from Ajax last summer.
Reports have even claimed that van de Beek could leave United during the current transfer window.
However, the 24-year-old is determined to stay at Old Trafford.
According to The Athletic, van de Beek hired a personal trainer for his five-week preseason break in Amsterdam.
He has also been working with both the club's medical team and strength and conditioning coaches to improve his physique.
Van de Beek wants to have a much better second season in England and is putting in the work to get his body up to scratch.
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