The 28-year-old Argentine is sidelined with a hamstring injury at the moment, but the following video suggests that he is doing the best he can to recover from it.
Zarate, who joined West Ham from Argentine club Velez Sarsfield in the summer of 2014, has established himself as an important player for the London outfit this season.
The attacker scored one goal and created two chances in those matches, while having a pass accuracy of 81% and a shot accuracy of 50%.
Zarate struggled to make an impact at the Boleyn Ground last season, scoring two goals and creating seven chances in seven Premier League appearances.
The Argentine was sent out on loan to London rivals Queens Park Rangers in the January transfer window, but the 28-year-old failed to do much of note at Loftus Road either.
The former Al-Sadd man could feature in just four league games for QPR, who got relegated to the Championship at the end of the 2014-15 campaign.