The Speed Force implies Fuerza and Psych aren't metahumans but instead physical manifestations of the Strength Force and Sage Force. Backing this up is the fact that two give off the same isotopic signature as the Speed Force. This would explain why they absorbed Flash's lightning so easily.
In the comics, Fuerza is Alexa Antigone, the avatar of the Strength Force. She has a variety of powers and uses them to fight corruption in her homeland of Corto Maltese. She also uses the alias "Powerhouse."
In the comics, Psych A.K.A. Bashir is the avatar of the Sage Force, who has a variety of mental powers. He was eventually killed in the comics by Black Flash.
Cisco says to Frost, "We can get you back to your normal two-minds-one-body existence. Wow, that's a Tuesday for ya." This is an in-joke because the show airs on Tuesday.