Absolutely not. Sit-ups and crunches are just one tool. A balanced approach includes a variety of exercises for all the abdominal muscle groups, not just the ‘six- pack’ muscles traditionally associated with a strong physique. Core strength can be improved by targeting not just the external abdominals but the inner abdominals and the spinal cord lining smaller muscle groups. Furthermore the muscles of your bottom, hips and pelvic floor are also vitally important, so should not be left out! From boxing to yoga, I’m happy to find an approach that suits you.