LOS ANGELES -- After a Chargers training camp practice last season, outside linebacker Bud Dupree and other teammates who had committed penalties during the session were told to go with the executive director of player performance, Ben Herbert.

"Nobody really knew what it was," said Dupree, who remembers jumping offside at that practice. "We were kind of anticipating that it was going to be some wild sh--- because it's 'Herb'."

Dupree and the others were ordered to participate in four sets of what Ben Herbert and coach Jim Harbaugh call "focus training." It consists of four sets of a plank hold and a position-specific stance, each held for 30 to 60 seconds. For Dupree, he got into a three-point stance or two-point stance and held for the time.

"But if you move, twist a finger, touch y

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