"You're amazing! Thank you for always being an inspiration," another wrote.
The 28-year-old joined the Pride from FC Kansas City last season, scoring six goals in 20 matches.
She explained on Twitter that she was careful while training with her team.
"I just do non contact stuff. Ball work. Getting touches in. I don't put myself in situations where the ball can ricochet or I can get hit," Leroux said on Twitter. "No high intensity running and I listen to my OB (who knows more than people on twitter telling me what I shouldn't be doing with MY body)."
Leroux is married to former Norwich City youngster Dom Dwyer and has played 78 matches of the USA including playing on World Cup and Olympic winning teams.