Spring Training Week 4 adds in a throw pillow, yoga block, or pilates ball for some of the classes to help engage your core and inner thighs. This week we encourage you to use heavier weights to help progress your strength. Expect longer cardio bursts and some classes will introduce high-rep challenges. If these classes feel a little out of reach, we encourage you to take week 3 one more time and come to week 4 when you are ready to advance! The playlists will feature songs from 2010-2015!