Adrian Peterson is participating in intense physical training at Houston's O Athletik facility with an eventual goal of "churn(ing) out 1,000-yard seasons into his mid-30s."
Adrian Peterson believes it will be the mental side of the game that causes him to retire, not the physical.
ESPN's Ben Goessling believes the Vikings will try to get Adrian Peterson more involved in the passing game.
Adrian Peterson said he wants to get in some work during the preseason.
Vikings coach Mike Zimmer said he does not believe the team needs to reduce Adrian Peterson's workload.
Adrian Peterson rushed 23 times for 45 yards in the Vikings' Wild Card loss to the Seahawks, adding two catches for 13 additional yards.
Vikings OC Norv Turner said the expected extreme weather in Minnesota will not affect his gameplan for Sunday's Wild Card game against the Seahawks.
Adrian Peterson (back) is listed as probable for the Wild Card Round.
Adrian Peterson (back) returned to Vikings practice on Friday.
Adrian Peterson (back) remained sidelined at Thursday's practice.
Adrian Peterson (back) didn't practice Wednesday.
Adrian Peterson rushed 19 times for 67 yards and a touchdown in Sunday night's Week 17 win over the Packers.
Adrian Peterson left Week 17 with a lower back injury.
Adrian Peterson (ankle, shoulder) did not practice Thursday.