Answer:
peripheral heart action
Explanation:
The peripheral heart action is a variation of circuit training that alternates upper body and lower body exercises throughout the circuit.
Peripheral heart action practice is a method of interval bodybuilding training that was coined in the 1960s by former AAU Mr. America and Mr. Universe Bob Gajda. Most sources say that Gajda has always credited Arthur H. Steinhaus to create the concept behind PHA.
