Six weeks ago the team behind One Arena set Ciara McDonnell a fitness challenge. At the end of it all, she’s a whole stone and 12.5 inches lighter.

Eating properly before exercise is half the battle, a lesson Ciara McDonnell learned the hard way on week four of her six-week weight loss plan.

Ciara McDonnell puts the One Arena plan to the test for six weeks - just in time for summer.