The 24-year old is looking to impress the new boss this summer.
The squad returned to training at the beginning of the week and will now be tasked with learning the ins and outs of the football philosophy of the former Liverpool manager.
Celtic fans as New Celtic manager Brendan Rodgers is presented after the press conference
“It’s nice to be back in with all the boys and the new manager so it’s both exciting and difficult,” said Armstrong. “We’ve had five weeks off, which is the longest I’ve had off in a long time, so we’re just adjusting back to football life.
“It has been quite good,” he added. “All of our training has been with the ball which makes it easier and nicer - there’s nothing worse than putting the trainers on and just running up hills so it’s the modern way of football to have the ball out and be running as well.
New Celtic manager Brendan Rodgers with the Scottish Premiership trophy after the press conference
“The manager knows what he wants. There has been a lift for everyone in the place and I really like his style of working. It’s only early days now but everyone is enjoying the atmosphere.”
Armstrong didn’t enjoy the best of campaigns overall last season but finished strongly and will be excited at the fresh start he now has at Parkhead.
That feeling will extend to every member of the Hoops squad and the next few weeks will be crucial in determining who makes the cut in the new Rodgers regime.
ex-Everton manager Roberto Martinez and ex-Liverpool manager Brendan Rodgers
Celtic’s new boss demands a lot from his players and fitness levels will need to be at an all-time high if the squad is to successfully carry out his high-intensity pressing game.
Rodgers also relies on technically adept attackers, and that will give the likes of Scott Allan, Ryan Christie and Armstrong the chance to really establish themselves ahead of the new season.
Exciting times lay ahead for Celtic under Rodgers and with Rangers re-joining the fray next season, intrigue around Scottish football is well and truly back.