Joonas Mäkipelto from Finland smashed the record for the Most chin ups in 12 hours after completing a staggering 4,040 reps at the Kamppi Shopping Centre in Helsinki, Finland last week.
The professional firefighter began the gruelling attempt by performing sets of five chin ups at a time, but around four hours into the attempt Joonas injured his shoulders and was only able to continue by performing one or two reps at a time.
However, the fitness enthusiast did not let this hold him back as he equalled the previous record just 9 hours and 36 minutes into his attempt.
Joonas Makipelto with GWR judge
Guinness World Records adjudicator Adam Brown presents a certificate to Joonas Mäkipelto after the attempt
Cheered on by an excited crowd, Joonas went on to beat the record by an incredible 290 repetitions.
Official Guinness World Records adjudicator Adam Brown flew out from London to judge the challenge.
Joonas Makipelto with fire
Joonas features in the brand new Guinness World Records 2017 Edition with the title Most chin ups in 24 hours, which he achieved in February by completing 5,050 chin-ups at Ideapark Shopping Centre in Lempäälä.
His shoulder was a setback in this attempt too and made it difficult for him to reach the current record of 5,045.
Nevertheless, Joonas persevered and managed to break the record by a painful five chin-ups, after 18 hr 52 min. 
An unusual finale came 15 minutes before the end of the 24‑hr period, when Joonas called his girlfriend on stage and proposed to her in public. She accepted.
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