If your spine is inflexibly stiff at 30, you are old. IF it ...

If your spine is inflexibly stiff at 30, you are old. IF it is completely flexible at 60, you are young.

Pilates' Return to Life Through Contrology (ed. Presentation Dynamics Incorporated, 1998) - ISBN: 9780961493790

Joseph Pilates Quotes

If your spine is inflexibly stiff at 30, you are old. IF it is completely flexible at 60, you are young.

If your spine is inflexibly stiff at 30, you are old. IF it is completely flexible at 60, you are young.

If your spine is inflexibly stiff at 30, you are old. IF it is completely flexible at 60, you are young.

If your spine is inflexibly stiff at 30, you are old. IF it is completely flexible at 60, you are young.