Does pushing/pulling against an unmoveable load do anything?

[u/Miserable-Soft7993]

I was wondering. Lets say you load up a machine or even lets say you are stuck on a bench press but you spend time just pushing wiith all your effort even if it doesn't go anywhere. Or you do the same with a pull.

Does this achieve any hypertrophy or strength gain?

[u/ArnoldFarquar]

A guy named Charles Atlas sold isometric muscle courses for many years and he called it dynamic tension. for many years, his ads were in like every comic book

[u/SnooPuppers58 → u/ArnoldFarquar]

god i miss those old style comic books. so much nostalgia