Our exclusive pics from the club's base show the Argentina international and homegrown forward working with the main group after spells on the sidelines.
Martinez has not played since the 1-1 draw at Brentford in March and has only made 11 appearances all season due to injury.
Rashford was hurt in the Emirates FA Cup semi-final against Coventry City at Wembley but is closing on a return to action, and a landmark 400th senior outing for his boyhood club.
