Get ready to strengthen your core with this effective 3-set workout. Begin with floor crunches, aiming for 10 reps per set, focusing on engaging your abdominal muscles and keeping your movements controlled. Follow this up with alternate heel touches, also targeting the obliques to enhance your waistline and core strength. Finish off the session with slightly bent knee leg raises, which not only work your lower abdominals but also engage the hip flexors, giving you a well-rounded core workout. Remember to breathe throughout each exercise, and maintain proper form for maximum benefit. Consistency is key in building a strong core, so make sure to incorporate this routine into your regular workout schedule.