Olga "Shakillya" Gutierrez (right) of Chicago bends down to pick up a cone during a skating drill ahead of Mary Ann "DiDominator" DiDomenico of Chicago during the Intermediate Derby Lite class in the Norridge Park District gym. | Ryan Pagelow~Sun-Times Media

Instructor Vicky "Molly Hacker" Andrews (center) of Chicago leads a skating drill with Kristine "Code Red" Maya (left) of Skokie and Caitlin "SvenHolly" Rinard of Chicago during the Intermediate Derby Lite class in the Norridge Park District gym. | Ryan Pagelow~Sun-Times Media

Derby Lite has been running beginner and intermediate non-competitive, non-impact skating fitness classes in the Norridge Park District gym since the spring. | Ryan Pagelow~Sun-Times Media

Carolina "Missle Piggy" Martinez (center right) of Chicago tries to skate through the pack which includes (from right) Instructor Vicky "Molly Hacker" Andrews of Chicago, Val Babyar of Chicago, Olga "Shakillya" Gutierrez and Lindsey "Dixie Buttkix" Wickman of Chicago during the Intermediate Derby Lite class in the Norridge Park District gym. | Ryan Pagelow~Sun-Times Media

Megan "Hell Kitten" Lutz of Evanston shows off her custom made toe guards on the front of her skates. | Ryan Pagelow~Sun-Times Media

Lindsey "Dixie Buttkix" Wickman of Chicago works on a skating drill during the Intermediate Derby Lite class in the Norridge Park District gym. | Ryan Pagelow~Sun-Times Media

Anna "Miss Tree Girl" Koch (right) of Chicago listens to an instructor talk about a drill where skaters start by lying down before jumping up to skate across the gym floor during the Intermediate Derby Lite class in the Norridge Park District gym next to Instructor Amber "Roxie Muzik" Polivka (left) of Chicago. | Ryan Pagelow~Sun-Times Media

Kristine "Code Red" Maya of Skokie hydrates during a water break during the Intermediate Derby Lite class in the Norridge Park District gym. | Ryan Pagelow~Sun-Times Media

Olga "Shakillya" Gutierrez of Chicago tightens her toe stop on her roller skate which came off during a skating drill. | Ryan Pagelow~Sun-Times Media

Mary Ann "DiDominator" DiDomenico of Chicago rests between drills during the Intermediate Derby Lite class in the Norridge Park District gym. | Ryan Pagelow~Sun-Times Media

Carolina "Missle Piggy" Martinez (left) of Chicago weaves through a pack of skaters which include (from left) Val Babyar of Chicago, Lindsey "Dixie Buttkix" of Chicago and Kristine "Code Red" Maya of Skokie during the Intermediate Derby Lite class in the Norridge Park District gym. | Ryan Pagelow~Sun-Times Media

Olga "Shakillya" Gutierrez (center) of Chicago tries to skate past Instructor Vicky "Molly Hacker" Andrews (right) of Chicago in front of Kristine "Code Red" Maya (left) of Skokie and Carolina "Missle Piggy" Martinez of Chicago during the Intermediate Derby Lite class in the Norridge Park District gym. | Ryan Pagelow~Sun-Times Media

The Intermediate Derby Lite class skates laps around the Norridge Park District gym, including (from left) Kristine "Code Red" Maya of Skokie, Caitlin "SvenHolly" Rinard of Chicago, Val Babyar of Chicago and Instructor Vicky "Molly Hacker" Andrews of Chicago. | Ryan Pagelow~Sun-Times Media

The Intermediate Derby Lite class skates laps around the Norridge Park District gym, including (from left) Instructor Vicky "Molly Hacker" Andrews of Chicago and Caitlin "SvenHolly" Rinard of Chicago. | Ryan Pagelow~Sun-Times Media