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Important (1) Serious students: buy & study "Return to Life..."! 
(2) Avoid potential injury! - Join the "Pilates Community" at your local gym or studio. (3) Tips on posture and muscle tensioning - "Pilates Contrology". Editor's Comment: Text to follow. |
Pilates demonstrating The Jack Knife, Poses One to Four: (diagram derived from original photo). 
(Comment, Pilates The Jack Knife, Scroll right>>>...) |
Reference
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