Jackie Wren and her husband Mark have been Davina's PTs for a decade The health and fitness guru let herself go after she had a miscarriage Davina intervened and the two embarked on a fitness program together Jackie ended up losing 16lb in 12 weeks, and dealing with her loss Read article in October issue of Health & Fitness magazine, out now By Sian Lewis, Health & Fitness Magazine PUBLISHED: 10:50 EST, 29 August 2013 | UPDATED: 10:50 EST, 29 August 2013 Davina McCall and Jackie Wren are great friends.