Katy Perry prefers skipping to stay in shape

The 26-year-old singer enjoys her 25-minute workout five days a week which she thinks is a better way to stay in shape in the long term.

"It`s an intense workout that lasts 25 minutes. Working out more often for shorter periods is better than three times a week for longer. Katy loves jumping rope, so that`s what we do for cardio. It`s convenient, dance-like and expressive and efficient, time-wise," Pasternak said.

The trainer has also has put the `Firework` hitmaker on a diet, where she eats five small meals a day, though once a week she can gorge into her favourite junk food, such as pizzas and chocolates, Contactmusic reported.

"She eats two meals and three snacks a day, consisting of healthy fats, lean protein, fibre and a non-sugar drink. Her favourite meal from recipes I`ve created is French toast - slices of bread dipped in egg white, skimmed milk and a little sugar, grilled and topped with low-fat ricotta cheese and berries," he explained.