Both types of Pilates emphasize core work and stability. Mat Pilates utilize body weight for resistance (and sometimes free weights), while the Reformer utilizes springs and pulleys for resistance training. Mat Pilates requires mindful focus on core engagement and form, whereas Reformer Pilates automatically supports proper form. Pilates Reformer promotes a greater range of motion, and Mat Pilates promotes additional focus. Mat Pilates can be more challenging for people with back soreness, but modifications are always available.