Katy Perry has said that she her knees are giving out on her now and she does acupuncture every two to three days.
The 30-year-old singer, who performed more than 100 shows in seven months in 2014, asserted that now her body just cannot take lot of alcohol, the Mirror reported.
The 'Dark Horse' hitmaker also said that she tours with a sage that goes from the front of the house to the back of the house with a triangle thrust that is a moving treadmill which she thinks that she was some kind of Olympic athlete.