This suggests that there is no evidence of stability - specific strength when testing strength on stable surfaces after either stable or unstable surface training. (strengthandconditioningresearch.com)
Its large wood top offers a sturdy and stable surface for 15 - inch (or smaller) laptops. (thewirecutter.com)
Remove all legs and tilt against a couch, wall, or other stable surface so the play surface is nearly vertical. (mamaot.com)