P90X, or Power 90 Extreme, is a home exercise system developed by Tony Horton in conjunction with Beachbody CEO Carl Daikeler, Beachbody Fitness Advisor Steve Edwards, nutritionist Carrie Wyatt, Creative Director Ned Farr, and workout video director Mason Bendewald of MEGA MACE productions. It claims to significantly improve physical fitness in 90 days through a rigorous segmented training program combined with a nutrition and dietary supplement plan.

P90X's advertising emphasizes "muscle confusion", a method of cross-training and periodization achieved through switching the order of exercises and incorporating new and varied movements. Muscle confusion is said to prevent the body from adapting to exercises over time, resulting in continual improvement without plateaus.

Exercise instructor Tony Horton had pursued a career in personal training, and had developed a series of home fitness training programs. In 1998, Horton and fitness trainer Debbie Siebers created a series of workouts called "Great Body Guaranteed". Horton's next fitness program was the "Power90 In-Home Boot Camp", which combined cardiovascular with strength training .

Richard Edmund Neal (born February 14, 1949) is the U.S. Representative for Massachusetts's 2nd congressional district, serving since 1989. He is a member of the Democratic Party. He is a former city councilor and mayor of Springfield, Massachusetts.

A Springfield native, Neal graduated from American International College and received a master's degree from the University of Hartford. After graduating he became involved in politics, working as an assistant to the mayor of Springfield. He served as president of the Springfield City Council from 1979 to 1983 while teaching high school history courses and lecturing at local colleges. He served as mayor of Springfield from 1983 to 1989, overseeing a period of economic growth. With his political influence and a head start on contributions, he was nearly uncontested when he ran for election to the House of Representatives in 1988.

As a member of the House Ways and Means Committee and chairman of the Subcommittee on Select Revenue Measures, Neal is an influential figure in House economic policy. He is widely considered a frontrunner for chairman of the committee. His top legislative priorities have been to reform the Alternative Minimum Tax (AMT) and close tax loopholes, although his success has been mixed. He has also dedicated much of his career to US–Irish relations and maintaining American involvement in the Northern Ireland peace process, for which he has won several acclamations. He has a generally liberal voting record, but is considered a moderate on such issues as abortion and trade.