Technically, hooping is a form of object manipulation and therefore shares some lineage with classical juggling.
There have been many studies relating activated brain areas to tool-use, in both physical object manipulation and pantomimes.
All these skills are forms of object manipulation.
The tricks can use the basic patterns of toss juggling but add more difficult levels of object manipulation.
Other tricks can be independent of these basic patterns and involve other variations of object manipulation.
It has been said that this more closely replicates the familiar hands-on experience of everyday object manipulation.
In this case we consider it as object manipulation when the object is taken out of its socially acknowledged context and its original purpose.
Toss juggling is a form of object manipulation.
Today many forms of twirling are popular, particularly with the object manipulation, juggling and general dexterity play community.
While most people think of toss juggling when you mention the word juggler to them, there are many other object manipulations that the term covers.