Bournemouth boss Eddie Howe said his side have experienced "a really difficult run".
"We've been knocked quite a lot this season with the injuries and the run that we've had. We had players playing who were not 100% fit," he added.
"It's not an excuse. The players gave everything but they were not in the best physical condition to play. At this level you get found out.
"It's our first time in the relegation zone for a long time, but that might be a good thing for us. It will change the mindset."
A true captain's performance from West Ham hero Mark Noble with his two goals. No player has been directly involved in more Premier League goals for the Hammers than Noble (45 goals, 33 assists).