When the longest game of his life was finally over, Caleb Swanigan wiped the sweat from his brow and decided there was still more work to be done. Purdue had just lost an overtime heartbreaker to Minnesota despite another Herculean effort from Swanigan, who went for 28 points and 22 rebounds in a career-high 41 minutes of playing time.

This was Swanigan’s fourth 20-20 game of the young season, but the round numbers didn’t do much for him. Swanigan’s confidence stemmed from his time in the weight room, the grueling training sessions that helped him transform from a 360-pound eighth grader to a hulking 250-pound sophomore star. Now he turned to Josh Bonhotal, Purdue’s 33-year-old strength and conditioning coach, and let him know neither of them were going home.

“Josh,” Swanigan said moments after the grueling loss, “I’m coming up.”

It started with 15 minutes on the stair climber. Bonhotal then took him through a series of medicine ball throws designed to strengthen his core. After that, Swanigan moved on to the hang snatch, an Olympic lift that has him pick up a bar from the ground and thrust it over his head. The hour-long session ended with some squatting and overhead presses before both men were finally done for the night.

Everything for Swanigan circles back to work. It’s a mindset instilled in him by his adoptive father Roosevelt Barnes, the sports agent who saved him from an early life spent shuttling between homeless shelters in Utah and Indianapolis. It’s work that helped Swanigan drop his excessive baby fat. It’s work that made him a McDonald’s All-American, Indiana Mr. Basketball, and the biggest recruit in Purdue history. Today, it’s work that shaped him into one of the best players in college basketball.

“My weight has always helped me make sure I’m staying on the right track,” Swanigan told SB Nation in a phone interview. “When my weight is going up, it’s reflected in my game.”

Swanigan’s game reflects those long nights in the gym. He leads the nation in rebounding, is second in the Big Ten in scoring, and dishes out almost three assists per game. Put it all together, and his numbers haven’t been seen at the college level since Tim Duncan was at Wake Forest. Big Ten Player of the Year might as well be in the bag already, and he has a real chance at national player of the year, too, if Purdue gets hot.

“He doesn’t stop,” Bonhotal said. “He’s so relentless. That’s what sets him apart. His capacity to do work is absolutely off the charts.”

Swanigan has rarely needed external motivation in his life, but he found it when he declared for the NBA draft last summer. He was coming off a solid freshman campaign where he averaged 10.2 points and 8.3 rebounds per game, but NBA scouts saw a big man who wasn’t quick enough for the league’s evolving landscape.

This time, weight wasn’t the issue. After checking in at 271 pounds at the Nike Hoops Summit out of high school, Swanigan was down to 247 pounds by the combine. Now he needed to become lighter on his feet. When he made the decision to return to Purdue, Bonhotal was one of the first people he texted.

“He said, ‘I need to get faster, I need to get more explosive, and I need to become a quicker jumper.’” Bonhotal said. “I told him this summer we’re gonna make a huge push and really build those things.”

Bonhotal built a program that emphasized plyometrics and sprinting instead of heavy bench pressing and squats. There was a focus on an ability to quickly change direction, using the same reactive shuttle test Swanigan saw at the combine. The trick for Bonhotal was getting Swanigan to sustain his peak explosion without sacrificing his raw power.

The gold standard at Purdue is the 20-meter sprint, which is about 3/4 court. Bonhotal used electronic timing gates to track acceleration. He stressed the first 5 or 10 meters, told Swanigan to coast for the next 5, then sprint again for the final stretch. He’s now 3/10 to 4/10 of a second faster than when he first got to Purdue. Bonhotal also said that he’s seen Swanigan vertical increase by 7 to 8 inches since he arrived as a freshman.

“The numbers we emphasize are the numbers most relevant to the court,” Bonhotal said. “Most of what you do on the court, you’re not always running in a full sprint. A lot of it is working at 70-80 percent. Now his 70-80 percent is faster. If he’s moving the same speed as before, it doesn’t take as much out of him.”

Swanigan’s dominance in the first half of the season has been overwhelming. His four 20-point, 20-rebound games are equal to the rest of college basketball combined, all 4,687 Division I players. He already has 16 double-doubles in 20 games. No Big Ten player in the last five years has had more than 14 in a season, when Wisconsin’s Frank Kaminsky did it as a senior.

There’s more to Swanigan’s game than just physicality. He made it a mission to become a better shooter, and the numbers are striking. He’s hitting 47.4 percent from three-point range this season after making only 29.2 percent of his threes last year. He’s also become a deft passer, whether he’s kicking out to Purdue’s shooters or finding 7’2 center Isaac Haas inside during high-low action.

Caleb Swanigan does not belong at this level. pic.twitter.com/RTSBvXr6ih — Big Ten Geeks (@bigtengeeks) January 13, 2017

Purdue coach Matt Painter said he isn’t surprised by the development, but there’s still some times when he’s in awe of how far Swanigan has come — and not just this season.

“It’s one of those things that helps you as a coach when adversity sets in, because he’s been through so much personally,” Painter said. “Not just losing weight. A lot of times players haven’t had a lot of adversity in their lives. They’re still young people. But he has. And he’s been able to conquer it. He takes on challenges. That’s why you’re seeing the big jump in improvement.”

For Swanigan, this breakout sophomore year is a testament to the work. There were so many times when he could have relented and become complacent with a body and a game that had already served him well. Instead, Caleb Swanigan keeps coming back for more.