Common meaning:

Level at which humans are able to engage in sustained physical effort.

Hidden meaning of the Equity religion: 

Oppressive idea of ableism that glorifies health and strength.

Discussion:

The Equityists believe that the promotion of fitness is part of systemic and oppressive ableism. By glorifying health and strength, able people are showing their hatred toward disabled people.

Ableism is one of the many oppressions that make up the fabric of the Equity religion. The faithful believe that all able-bodied people hate disabled people and one of the ways able people show their contempt is by exercising. It then follows that fitness centers are committing violence against the disabled and need to be shut down.

The Equityists realize that, at this point, they can’t attack exercise directly, although that will come eventually, so they go after it in other ways. One tactic I have seen used is accusing a husband of being sexist because he allows or encourages his wife to exercise. The Peloton commercial about a man who buys his wife a bike for Christmas is an example of this.

Remember, the Equityists are not following logic, but are following a belief system that intends to destroy.