PHA training
Encyclopedia
PHA training or Peripheral Heart Action Training is a form of bodybuilding
Bodybuilding
Bodybuilding is a form of body modification involving intensive muscle hypertrophy. An individual who engages in this activity is referred to as a bodybuilder. In competitive and professional bodybuilding, bodybuilders display their physiques to a panel of judges, who assign points based on their...

 circuit training
Circuit training
Circuit training is a form of conditioning combining resistance training and high-intensity aerobics. It is designed to be easy to follow and target strength building as well as muscular endurance. An exercise "circuit" is one completion of all prescribed exercises in the program. When one circuit...

 that was popularized by former Mr. America
Mr. America
Mr. America may refer to:* AAU Mr. America, bodybuilding contest held by the Amateur Athletic Union from 1939 onwards* IFBB Mr. America, bodybuilding contest held by the International Federation of BodyBuilders in 1949 and 1959-1988...

 and Mr. Universe
Universe Championships
The Universe Championships are an annual bodybuilding event organised by the National Amateur Bodybuilders Association . It has a number of competitions: NABBA Amateur Mr. Universe, Miss Figure, and Miss Toned Figure....

 Bob Gajda in the 1960s.

This method is specifically designed to keep the blood circulated throughout the body during the entire workout. The smaller muscles around the heart are worked on first before the larger muscles around the body's periphery.

The technique requires the exerciser continuously exercises over a long period of time with no breaks.

John McCallum, the noted physical culture writer, wrote several articles concerning P.H.A. in his series The Keys to Progress. McCallum advocated P.H.A., running, and a high protein/low carbohydrate diet for maximum definition, improved endurance, and sound health.
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