Training camp is about to get underway across the NFL. If you're a hardcore football fan, you know what that means.

It means installing offensive and defensive systems. It means working on gadget plays. It means two-a-days. It means walkthroughs. It means full-padded practices. It means helmets-only practices.

It also means it's time for #MUSCLEWATCH2016.

Players all over the league will be reporting to camp in the best shape of their lives. Some will have lost 15 pounds of fat. Some will have gained 15 pounds of muscle. (It's always 15 pounds.) Some will simply never have felt better.

One of those players: Colts quarterback Andrew Luck.

"I feel great, I feel as good as I've ever felt going into a training camp," Luck told NFL.com. "Strength staff, conditioning staff and trainers, we've put a lot of work in this offseason and ... that's helped me and all the guys a lot, feel great, can't wait to go."

That's a good sign! Luck was alternately injured and ineffective during the 2015 season, by far the worst of his career. The Colts gave him a brand new center (Ryan Kelly) in the draft to help keep him upright and feeling great. Then again, he admittedly just was not good last year, injury or no injury.

"Personally, I know I wasn't playing well, whether I was injured or not," Luck told the Indianapolis Star. "I have some thoughts, but I don't want to share them. I wasn't doing a good job and it's no one else's fault but mine."

Luckily, he's feeling the best he's ever felt going into camp, so everything will be back to normal in 2016.