Strict planche form is something that is rare and hard to come by. If you read The True Art and Science of Hand Balancing there’s great tips and ideas on what it takes to achieve it. Here are some examples of a strict planche versus a not so strict one.
Before we get into that, I want to say that a planche in ANY form is still an amazing feat. From there it requires more work to tighten up the form, which makes the move harder.
Notice the straight arms, the straight back and the straight legs. These are required for a planche in the best of form and one or more will break down in the following examples.
Non Strict Planches
Also with these the legs tend to be higher up then the torso and head and this is amplified by the arch in the back. This same effect can be seen in levers.
Once again, this isn’t to say that these other moves aren’t planches, its just to show you that if you’re planche form isn’t strict you can keep working at it.