More rest will help former world champion Cate Campbell overcome a wrist complaint that has flared at the Rio Olympic swimming trials in Adelaide.
Unfortunately that is just what caused it.
Campbell has added to her long list of injuries with her most bizarre one yet.
The former 100m freestyle world champion revealed on Monday she had damaged a wrist joint while napping last week.
Campbell said she had bent her wrist back awkwardly - not once but twice - in her sleep.
"I am an aggressive napper," Campbell laughed.
"I woke up the first time and the wrist was sore then somehow I did it again - that did it."
Campbell said "aggressive" physio had helped but did not rule out needing a local anaesthetic to relieve the pain.
Asked what the best treatment was, Campbell said: "More rest should do it a lot of good".
Campbell (53.25 seconds) was still fastest ahead of Monday night's 100m freestyle semi-finals, with her world champion sister Bronte (53.73) third quickest.
The 2013 100m world champion wasn't getting much sympathy from her younger sister Bronte.
"She is pretty talented to be able to injure herself while asleep," Bronte Campbell said.
"Even when she is not doing anything she is hurting herself."
Cate Campbell has a knack for overcoming hardship.
She almost gave the sport away when she withdrew from the 2010 Commonwealth Games with a form of chronic fatigue syndrome.
She bounced back by the 2012 London Olympics to help Australia win 4x100m freestyle gold, only to pull out of the individual event with pancreatitis.
And she had overcome 2015 shoulder surgery to appear back to her best when she arrived for the Rio trials.
Meanwhile, dual world champion Mitch Larkin (one minute, 57.27 seconds) was two seconds faster than his nearest rival ahead of Monday night's 200m backstroke semi-finals.
Thomas Fraser-Holmes (200m individual medley) and Taylor McKeown (200m breaststroke) were fastest ahead of Monday night's other semi-finals.
In Monday night's main event, Cameron McEvoy, James Magnussen and Kyle Chalmers will vie for 100m freestyle gold.