At Practice CrossFit, trainers shake bodies out of muscular slumber by leading weight training and cardio exercises from gymnastics and rowing to running and jumping. Exercisers work through routines customized to their experience levels and abilities, ensuring a workout as safe and challenging as a padded Rubik's cube. Practice CrossFit's resident former competitive bodybuilder and college basketball player, Chastity Sloan, runs women through intensive boot-camp classes. The courses focus on aerobic and muscle-building exercises, with demanding workouts that raise heart rates like kidnappers raise ransom rates with demanding lists of demands. The gym holds women-only boot-camp classes Monday and Wednesday at 5 a.m. and Tuesday and Thursday at 6:30 p.m. Click here for a schedule of CrossFit classes, which run Monday–Saturday.