Dick Van Dyke is still exercising at age 100. The TV icon shared an Instagram video over the weekend of him showing off his flexibility on a workout inversion table outside. Van Dyke laid down on the machine horizontally and held onto the handles, before he put his hands behind his back and safely balanced on the table. He wore a white t-shirt, gray sweatpants and slippers for the wild workout routine. “1/2 workout inversion table,” Van Dyke captioned the clip, adding, “#keepmoving.” Fans flooded the comments section and praised Van Dyke for being so agile and fit at his age. “That’s it. I have to start exercising. What a legend!” one…