This easiest way to build up your core muscles is buy building up your plank endurance. The easiest way to do that is via a team effort to keep yourself motivated.
On December 1st the challenge begins….
1) Select either the 3- or 5-minute goal.
2) Follow the daily schedule.
3) Come to Core Session on Monday January 4th to show us what you’ve got!
See Meetup and Facebook for more details.