Interviews - MMACanada.net presents Strength & Conditioning 101: Windshield wiper/partner knee tuck rotations for CORE power. This exercise focuses on core power through the supine windshield wiper/partner knee tuck rotations/hanging windshield wipers. Enjoy this free training clip courtesy of MMACanada.net and the MMA Freak JP Castillo. Want to see a tip? e-mail mmafreak@mmacanada.net