I feel that definitions of open and closed kinetic chain exercises are slightly contradictive and unclear.

One definition says that in open chain exercises, the distal part of the extremity can move, so bench press and leg press with seat fixed are open kinetic chain exercises.

Another definition from a book says

"In applying the closed kinetic chain definitions to clinical situations, an exercise in which resistance is placed through the distal aspect of the extremity and remains fixed to the extremity is considered a closed kinetic chain"

This is a very open definition and would classify the above exercises are closed.

Which is right?

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