Most people doing sit-ups simultaneously

According to Official Guinness Records,

The most people doing sit-ups simultaneously is 2,005 and was achieved by Kayla Itsines and the BBG Community in Melbourne, Australia, on 17 November 2016..

For a complete list of 2016 records, please visit 2016 Guinness Records in Australia.

Other Australia records that might interest you:

• Most people star-jumping
• Most people running in place simultaneously
• Largest gathering of centenarians
• Largest marimba ensemble
• Largest club DJ session relay
• Largest convoy of off-road vehicles