About Belief.

Belief Boutique Gym Killarney
Belief Boutique Gym Killarney

About Belief Boutique Gym

Eric and Josie have made a commitment to bring Killarney the most innovative and on trend health and fitness. They continue to do this by evolving every year. Following their dreams and leaving Dublin in 2013 to set up Belief Gym has been their best achievement to date.

Both having worked in Management roles in Sports Ireland Campus Dublin including event management, while also coaching a multitude of classes over the years along with vast amounts of experience in personal training with every client imaginable from disabilities right through to elite athletes. They have acquired a wealth of education and knowledge to give to their people.

Both are qualified Life Coaches , this brings an innate ability to work with all clients inclusively and assist them towards whatever goals they may have in life.

" Be Limitless"

Both are competitors at local and national level. They thrive on challenging themselves and they believe that instilling belief in their members is imperative to their progress and self achievement in every area of their life!

Our Trainers

Belief Boutique Gym Killarney

Josie McDonnell


☆ National Diploma /Degree in Science and Health & Leisure Management studies (Tralee IT)
☆ Personal Trainer NCEF specialist
☆ Diploma in Life and Business Coaching
☆ CrossFit Level 1 & 2 Coach
☆ Anti Gravity Yoga Level 1 & 2 Teacher Certified
☆ Numerous qualifications in fitness such as suspension trainer, swim teacher, Spin, Boxercise, Kickboxing, Rebounding & more.

Having always been involved in sport from a young age , I loved the way working out made me feel, the escapism of it all , the clarity it brings! I also loved the community vibe and spirit of sport and the social aspect of it all! A sense of "Your in this together" with your team!

Setting Up Belief and working with people in a positive environment with good music and a social outlet keeps me ignited everyday! I know this sounds cliche but I love what I do, I'm passionate about health & fitness. I feel my soul purpose is to assist people in whatever way I can to be fit, healthy , Happy with an all round balanced approach to life!

What I love the most is seeing how empowered people feel after a great workout or achieving things they never thought they could!

Instill Belief in your people to take on or overcome any challenges life may throw at them

Belief Boutique Gym Killarney

Eric McDonnell


☆ National Qualification in Exercise, Health Studies and Personal Training (EQF)
☆ CrosssFit Level 1 & 2 Coach
☆ Aerobic Capacity Certified
☆ British weightlifting certified
☆ Life and Business coaching Certified
☆ Numerous other fitness qualifications, such as TRX, Spin etc

Eric has a wealth of experience in the fitness industry. He has aligned himself with sports and Fitness for an extensive period of time and from a very young age.

A unique addition to his qualifications is his lifecoach certificate, Eric feels this a valuable tool especially when working 1 to 1 with people. Eric has finished inside the Irish top 10 in the CrossFit Open 6 times. He has a great passion for what he does and is head of programming for belief. With the programming his goal is to create a sustainable programme that people will enjoy and reach their personal goals.

"In order to be successful, I'm a believer in having my beliefs in harmony with my actions, people watch & learn more from what you do, as much, if not more, than listen to what you say."

"The ability to align my words with my actions is key to building trust with others, and to be a good Coach."

"Practice what you preach, Behaviour Never Lies!"

Belief Boutique Gym Killarney

Micheal O Shea

Teacher, Coach and Competitor.

☆ Masters in Education University of Limerick
☆ CrossFit Level 1 Qualification
☆ Qualified Swim instructor and Lifeguard
☆ Aerobic Capacity Qualification
My fitness journey began with running, football and swimming but nothing could compare to the experiences I've had since I joined the CrossFit classes in Belief back in July 2015.

I began training under Eric and Josie and quickly became fanatical about CrossFit, I obtained my qualification to coach in 2016 and ever since I've immersed myself in learning as much as I can about all aspects of Fitness.

I'm very passionate about education and coaching whether it's in school or in the gym.

As a coach there's nothing more fulfilling than working with someone towards achieving a target. Belief has an empowering atmosphere, when you join a class you're working alongside a group of like minded people, with everyone chasing their own goals. I think that's what makes this gym so special, once you join you'll never look back.

Belief Boutique Gym Killarney

Jennifer McCarthy

Teacher, Coach and Competitor.

☆ National Qualification in Exercise, Health Studies and Personal Training, with NTC
☆ Sports Nutrition Diploma
☆ Sports First Aid
☆ Spinning Instructor

I have always had a keen interest in running, cycling, hiking etc🏃🏻‍♀️🚴‍♀️🏞 in recent years my focus has turned more towards strength training, Crossfit and nutrition🏋‍♀️🍓🥑

I began working as an instructor in 2017, and I have been working part-time with Belief since the start of 2022😎

Belief is a place where one can challenge themselves, learn new skills, step outside a comfort zone and achieve personal goals in a safe and supportive environment, working alongside trainers and members alike who want you to achieve, encouraging you and providing support 100% along the way!

'The Body Achieves what the Mind Believes' 💫💜

Belief Boutique Gym Killarney

Pauly O Donoughue

𝐒𝐞𝐧𝐢𝐨𝐫 𝐂𝐨𝐚𝐜𝐡 & 𝐏𝐞𝐫𝐬𝐨𝐧𝐚𝐥 𝐓𝐫𝐚𝐢𝐧𝐞𝐫 𝐚𝐭 𝐁𝐞𝐥𝐢𝐞𝐟.

Experienced in multiple areas from Coaching ,Nutrition , Personal Training, Youth development and pre & post natal coaching. He has a wealth of knowledge aligning with thr Belief Team

He's a keen GAA player with St Mary's club with lots of experience in football ,playing with Kerry from minors right up to Senior level . 🏐 Few medals in the bag 🏅 🎒 winning 3 All Ireland 🇮🇪 🏅 , 2 Junior (captain for 1 )and 1 Senior all Ireland

👨‍🎓👨‍🎓BSC in Health & Leisure Studies along with numerous industry qualifications.

His energy and enthusiasm is infectious and he is sure to get you working hard & smashing those goals.

Hear it from Pauly " I love seeing someone progress in coaching. This could be a beginner right up to an experienced gym member. Everyone is different and everyone is on their own journey to better themselves through fitness and I like playing a small part in that process"

My Passions are fitness, sport, family, friends and having fun. I try to find balance in all areas , the beauty about being passionate Is one may be sacrificed at stages to excel in another"