Mitch Marner shares highlights from his offseason workout program.

For fans of the National Hockey League things are relatively quiet right now as far as the NHL is concerned, however at least for some of the high performance athletes who play in the league it's business as usual.

Toronto Maple Leafs forward Mitch Marner may have had a breakout rookie season, but he certainly hasn't let that get to his head and on Wednesday he showed fans just what he's been up to this offseason. 

Marner shared some highlights of a summer session with 3 Zones Hockey and you can see those in the video below.