There's a reason Rashod Hill was doing extra wind sprints on his own after Monday's non-padded morning practice for the starters and select veterans assured of making the Vikings' final 53-man roster.
His boss, coach Mike Zimmer, wants the big swing tackle in better shape than he's shown while filling in for Brian O'Neill, the starting right tackle who will miss the entire preseason because of an injured right elbow.
"I would say Rashod has improved," Zimmer said. "He has to continue to work on his hand placements. There's been times typically at the beginning of the drive or the series or the game that he does pretty well.
"And then he seems to lose a little bit of concentration as he gets a little bit tired. Conditioning for him is going to be big."
The Vikings have turned to Hill several times since Nov. 15, 2016, when a decimating run of injuries at tackle led to signing Hill off Jacksonville's practice squad as a rookie.
After making his debut in that year's season finale against the Bears, Hill went on to start nine games, including playoffs, in 2017 and eight games last year. He has 13 starts at right tackle and four at left tackle.
During the offseason, Hill went to an "O-line Masterminds" summit where 30-some NFL players got together under trainer Duke Manyweather in Dallas and discussed everything from how to stop Khalil Mack to keeping the right mind-set. Hill thought his 2018 season was poor, and said he told his agent, Brett Tessler, "I don't want this to happen no more. I want to get better.
"I'm still working on my pass [protection] a little bit, but when it comes to that run blocking — oh my gosh, [Manyweather] got me so much better as far as the little details, little small things. When I was down there, the stuff I learned from older guys and how they approach the game: 'How the game's on Sunday, but the game is really won during the week. How are you preparing? Are you eating the right things? Stretching?'"