Forsythe, who was part of Germany’s triumphant Brazil 2014 campaign, joined up with the Gunners squad during their recent tour of New York before travelling with the team to Austria for a pre-season training camp.
A series of injury problems last term raised question marks over the Gunners’ training methods at their London Colney HQ.
Manager Arsene Wenger revealed last year how the club had started a review of their procedures following an accumulation of injuries that disrupted their Premier League title challenge.
Forsythe, who will take the match-day warm-ups, will work in tandem with the club’s current fitness specialist Tony Colbert.
The American already has a close working relationship with the club’s German trio Per Mertesacker, Mesut Ozil and Lukas Podolski following his role with the German FA.
-By Daily Mail