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Vulcan gym trainer Grant Higa and MIE trainer Kelli Wood are teaming up to find the Vulcan employee with the strongest core muscles.
Your challenge: Hold a plank on a balance ball for as long as possible.
Rules:
- Use the 55 cm ball
- Feet must be together when doing the plank
- Body must be completely straight while doing the plank
For questions email VIBE@vulcan.com
Details: This is a one-time challenge
End date: December 31, 2012 |
