Safe & Unsafe Exercises « physioleeds.co.uk
https://www.physioleeds.co.uk/safe-and-unsafe-exercises/
http://j.mp/1k00EeQ
The Safe way to do Sit-Ups
The correct way to perform sit-ups is with your hands behind your ears. With both this and the abdominal curve tilt your pelvis to flatten the small of your back and pull in your tummy muscles before lifting your head and shoulders to perform the curl.