Max Jarrett, 28, from Nantwich, completed more than 9,500 kettlebell swings during the gruelling challenge, raising more than £5,000 for Papyrus Prevention of Young Suicide, a charity based in Warrington.
He swung a 24kg kettlebell over 12 hours, lifting a total weight of more than 230,000kgs in memory of a close friend who died by suicide last year.
Mr Jarrett said: “I actually don’t remember much about swinging the kettlebell because after a while you just switch off.
“The pain is such that you don’t think about it, you just have to trust your body.
“As a personal trainer my focus is obviously on physical health but I know mental health is just as important if not more so.
“After my friend took his own life I knew I had to do what I could to raise awareness of Papyrus and the lifesaving work they do.
“I genuinely believe in the cause, I feel better than I’ve ever done and I just want to carry on doing as much fundraising as I can.”
Surrounded by family and friends at Elite Fitness Cheshire, one of the gyms where he works, Mr Jarrett pushed through the pain to set the record.
He surpassed the previous record of lifting 180,000kg after nine hours and 20 minutes and decided to continue for the full 12 hours.
Vicki Dutton, fundraising manager at Papyrus, said: “We’d like to say a huge thankyou to Max.
“What an amazing achievement!
“Money raised by his fundraising helps us to give hope to young people who are struggling with life.
“Generous donations help to pay for potentially lifesaving calls, texts and emails to our confidential HOPELINE247 service which offers support and advice to young people and anyone who is worried about a young person who may be having thoughts of suicide.
“Funding also helps Papyrus to engage with local communities and volunteers in suicide prevention projects and supports the training we deliver to individuals and groups, equipping people with the skills to recognise and respond to suicidal behaviour.
“We believe that many young suicides are preventable and together we can all help to keep our communities suicide-safe.”
For confidential support, contact HOPELINEUK247 on 0800 068 4141, text 88247 or email pat@papyrus-uk.org.