Linebacker David Mackall was exhausted after Monday's two-a-day session in College Park.
The well-regarded Maryland prospect dropped five pounds in the heat and humidity and was both hungry and happy his weight didn't fluctuate more.
"I lost nine the first day," Mackall said.
That's about the only thing Mackall is truly going without during his first camp.
Mackall is among the handful of true freshmen expected to play this season for the Terrapins, even after a position switch on the eve of camp.
The 230 (or so)-pounder came in during the spring semester after spending the fall at Fork Union Military Academy. Maryland plugged him in as a reserve on the strong side, where it seemed he would find an early niche as a third-down pass rusher.
Then Avery Murray left the program just before camp started, leaving the Terps with only Ryan Donohue to back up Alex Wujciak. That led to a switch for Mackall, who played middle linebacker in high school but moved to the strong side last season in prep school.
"As of right now, I feel things are starting to slow down for me," Mackall said. "The first two or three days, everything felt like it was a lot of waves coming at me and I started to feel overwhelmed a little bit and started to get frustrated. But I just dealt with it and stayed with the playbook."
It was probably a shrewd decision on Maryland's part to permit Mackall to remain part of some of defensive coordinator Don Brown's blitzing schemes. That, after all, is what Mackall did better than anything in the spring.
But just as importantly, it provides at least a sliver of players he understands completely as he continues to learn middle linebacker at Maryland.
"That part is just like that," Mackall said while snapping his fingers. "When we put that package in, it came right away."
It could turn out, as expected, that Mackall will be more of a specialist than an every-down linebacker. Maryland has three entrenched starters in Wujciak, Demetrius Hartsfield and Adrian Moten, and linebacker is probably the team's deepest position.
Plus, Mackall is far from a perfect product at this point.
"Don had him in there today in that 30 nickel stuff and he was an edge rusher," coach Ralph Friedgen said. "It was really good opportunity for Donohue and Mackall today to get a lot of work with Wujciak out [with knee swelling]. I saw Mackall miss some tackles. He was in the right spot, but he missed some tackles."
It's probably not unexpected, either, since Mackall's playing in a structured system after essentially freelancing throughout high school. Suddenly, there are assignments to follow, with disaster awaiting after many miscues.
Nonetheless, he isn't bashful about the he expectations he has for himself to play well this fall.
"As of right now, I see myself making a big impact for us as far as blitzing the quarterback," Mackall said. "As time goes on, I know I'll learn the defense better and I'll get better. So anytime one of [the starters] needs help, I think I'd be all right to step in and take care of that situation. But as far as me blitzing, I think that'll be my biggest impact."
At least as long as he can keep his weight steady. Interestingly, that doesn't even rank at the top of the things he's learned in the last week while toiling in the August heat.
"No, that's about lesson No. 5," Mackall said. "Lesson No. 1 is camp is hard as hell."
Mackall isn't lacking sensible observations about the camp experience. Neither, it would seem, is he missing a chance to make a difference immediately at Maryland.