CrossFit DHM wall mural of athletes and logo.

Covid-19 update: CrossFit DHM is open and operating additional health and safety precautions in line with national guidelines.

CrossFit DHM

Health. Fitness. Happiness.

What is CrossFit?

CrossFit is constantly varied, functional movement, at high intensity.

In plain English:

Constantly varied - workouts are different every day and scalable to an appropriate level for all, regardless of age or fitness level.

Functional movement - safe, effective and efficient movements that mimic those used throughout life.

High intensity - improve fitness in a safe, but challenging, way.

At CrossFit DHM our aim is to give you the best hour of your day in a supportive community setting. Our qualified coaches focus on quality of movement and helping you achieve your goals, whatever they are.

We train hard, always doing something different, and have fun while we’re doing it.


About us

The Box

At CrossFit DHM everything revolves around our community, made up of people from all walks of life. Started in 2012 by Dave and Joyce Ranson, the gym has grown in size and strength over the years. In 2020 the box was taken on by two member-turned-coaches, Mark Davies and Rosi Jelfs. Both have full-time careers in the ‘real’ world, but share a passion for CrossFit and helping others succeed.

Image of Mark Davies.
Mark Davies

Role: Affiliate owner and Head Coach

Occupation: NHS Project Manager

Qualifications: Crossfit Level 2 Trainer

Member since: 2014

Favourite Crossfit workout: Murph. It was my first ever CrossFit workout so I have a real affinity with it.

Best thing about being a coach: Working with people of all ages and abilities, and witnessing people improve right before your eyes.

Image of Rosi Jelfs.
Rosi Jelfs

Role: Coach and media 

Occupation: Information Services Manager at Durham University

Qualifications: Crossfit Level 1 Trainer

Member since: 2015

Favourite Crossfit workout: Playdate with Grace and Karen

Best thing about being a coach: The lightbulb moment - when you see something click for someone!



CrossFit is for everyone

At CrossFit DHM we believe CrossFit is for all, regardless of race, age, gender, disability, religion or sexual orientation; regardless of ability or fitness level. We would like everyone to feel included and welcome whether they are a member, prospective member, or visitor. We recognise that joining a new gym or starting a fitness journey can feel intimidating, particularly for people who identify as part of a minority group. We will do all we can to support and welcome all into our community.


We don’t believe, however, that Crossfit is ‘one size fits all’ - everything can be adapted to suit the individual. We think this is especially relevant in the case of disabilities, learning difficulties, injuries and other health conditions. We work with individuals, blending our movement knowledge with their experience of their body and mind, to find suitable adaptations where necessary. 


You aren’t obliged to disclose your medical history, disability, health condition or injury to us when you come for a free trial or become a member, but if you choose to do so it might mean we are better able to adapt our coaching to your needs and/or make reasonable adjustments, especially if there is an impact on how you move or learn. We won’t treat you differently, but we will tailor our coaching.

If you would like to discuss your needs as an individual with us, feel free to email, message, or speak to us in person to request a private conversation. This conversation often works best in person, but if you would prefer another method please ask and we’ll do our best to accommodate it. We will take a non-judgmental approach; we will listen, ask relevant questions, and use this knowledge to inform how we coach you. The details will be treated confidentially, but may be shared with other coaches if relevant. We will not disclose confidential information to other members unless you ask us to.