McKayla Maroney performs in the floor exercise event 147during the final round of the women's Olympic gymnastics trials.
 / AP photo
LONDON (AP) — World vault champion McKayla Maroney has done only light training this week because of a sore right foot.
The American did a few warmup vaults Tuesday and the dance elements in her floor exercise routine. But she did not do any of her tumbling runs on floor and spent most of the roughly 90-minute session on a chair, watching her teammates. She did much of the same Monday.
The Americans did not talk after practice. USA Gymnastics said Maroney is resting her right foot.
The women's competition begins Sunday, and the Americans are heavy favorites to add Olympic gold to the world title they won last fall. Maroney is also a heavy favorite to win gold on vault.
Copyright 2012 The Associated Press.