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Ann and Chris Frederick’s concept of the Core-Four Lower Stretch Matrix is a great way to improve hip mobility for the squat and restore the freedom of motion and stabilizing function of the core.
The importance of stretching - Harvard Health
Best Stretching Exercises for Everyday Flexibility
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Fascial Stretch Therapy - It's the Way I Roll – the nutritional reset
TSN's Core 4 Under-24 NHL player ranking have Dallas Stars at No. 1
Psoas-Releasing Yoga Practice for Core Strength
Core four wallpaper, Core 4 / Resources
Core 4 / Resources
Physiq Fitness - Trainer Tip Tuesday From Andrew Lehti.
Taking A New Look at Stretching: The Core Four