Gregor Townsend instilled a high-tempo style in his five years at Scotstoun and Cummings says incoming head coach Dave Rennie will look to continue that focus this season.
Speaking to BBC Scotland, the big lock forward said: "We're given a free license to play heads-up, expansive rugby and we've definitely got the players to deliver it.
"Sometimes we're maybe doing a bit more contract drills, he's really focusing on our speed of play. A lot of it is still the same; he just knows what he wants."
Cummings was handed his Warriors debut by Townsend at just 18, and with his former club mentor now leading the national team, the former Glasgow Hawk was included in a three-day Scotland camp during August.
"It was huge and something I've been aspiring to for years," Cummings said of his call-up. "It's always been a dream of mine; to get that taste of it was amazing.
"You can see the step up in play, how fast it is, every little detail everyone focuses on. It's sort of shown me where I need to be at if I want to be at that level, and there are areas I can improve on, analysis and stuff like that. It's given me a level to aspire to.
"Gregor's all about playing quick, high-tempo rugby like Glasgow played last year. At Scotland it's another step up - you need to know your roles exactly so you can play at that speed. If you don't know your roles, stuff starts to go wrong.
"Everything's done at 100 miles-an-hour and you're expected to perform well. There are a lot of guys all competing for the same positions."