Under Moyes the players were fit but with lots of injuries.
Under Martinez (and despite his supposed physio qualification) they were unfit but with lots of injuries.
Under Koeman they are fit and (apart from a small number of one-offs and the perpetually fragile hamstrings of Besic and McCarthy) there are relatively few injuries.
Could be some luck, but I say it's amazing what difference a professional set up makes...
Under Martinez (and despite his supposed physio qualification) they were unfit but with lots of injuries.
Under Koeman they are fit and (apart from a small number of one-offs and the perpetually fragile hamstrings of Besic and McCarthy) there are relatively few injuries.
Could be some luck, but I say it's amazing what difference a professional set up makes...