A fitness fanatic was left paralysed from the neck down - after falling on her head while doing an 'inverted' sit-up at the gym.<br /><br />Marcelle Mancuso, 23, broke a vertebrae after slipping off a bench while performing the common abdominal exercise.<br /><br />Doctors warned her she could be a tetraplegic for life and fitted a titanium plate held by six screws into her spine.
