Hold Strong for LauraLynn - 30 Day Plank Challenge Your challenge begins 10 days after registration. You must have JavaScript enabled to use this form. Status message Thank you for your interest in taking part in our 30 day Plank Challenge. Our registration page is now closed for this challenge. If you would like to take part in another challenge or marathon please contact community@lauralynn.ie. Plank Challenge - Sample Tracker pdf Plank Challenge - Instagram Story Tracker pdf