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Welcome to CrossFit Unit 5/Frontline Fitness

Your CrossFit Gym

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We are based at Alma Park in Grantham, Lincolnshire 

What is CrossFit 

CrossFit is a form of constantly varied high interval training. CrossFit is strength and conditioning that is made up of functional movements and these movements are movements you perform in your day to day life like squatting, pulling and pushing etc.
Our CrossFit classes are for any level of fitness whether you are new to the gym or have been training for a long time. As well as our CrossFit classes we also offer a barbell class every Friday at 6pm which we teach compound and olympic lifts like snatch and clean and jerk. 

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Our Classes

At CrossFit Unit 5/Frontline Fitness we’ve designed a number of classes for people at all levels. If you want to go far, we’ll get you there. Pick and choose the classes that you like, when it best fits your schedule. Book your spot now!

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Frontline Fitness classes

Frontline Fitness classes are 45 minutes of a mixture of Strength & Conditioning and high intensity interval training. 
Every workout is always different and using a variety of equipment each session. 


CrossFit classes

Our CrossFit classes are constantly varied, high intensity, strength and conditioning sessions. We use functional movements that everyone uses in there day to day life whilst also improving and  working towards new skills and getting stronger. 

Personal Training

Our Personal Training one to one sessions are with our head coach and owner Curtis Gardner. What ever your goal is we can focus on Weightlifting, Strength training, Tone up, Lose weight, Build muscle or Increase flexibility. Book a session now on 07583891514


Call to hear more about our complete list of classes.


Contact Us

Frontline Fitness
Limesquare business park NG31 9SN


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Our Testimonials

Real Experiences, Real Results

Since our establishment, CrossFit Unit 5/ Frontline Fitness has helped countless members find solutions to their fitness and strength challenges. Still have your doubts? Read on to learn what our customers have to say about their experiences working out with us.

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What a gym! 24hr access, great bunch of people, massive range of equipment. Everything you could need

10/10 would recommend 🙌🏻Fantastic classes with fantastic people

I’ve been working with Curtis for a month. He’s an excellent personal trainer and I’m really feeling the benefits of his approach, especially with the cross fit work he mixes in. Everyone at the gym is lovely and super supportive.


I can highly recommend the crossfit classes at crossfit unit 5. Curtis is a great trainer and knows his stuff. A welcoming atmosphere with fantastic equipment you couldn't ask for more. I strongly suggest anybody wanting to take up crossfit to get in contact and give it a go. You will recieve a warm welcome and enjoy it from the off



Come Visit Us!

Monday - Sunday open 24hour access 

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Our Classes

Barbell Basics

This class is sure to become your next obsession. It’s based around the belief that mental and physical health are interrelated, and should be conditioned together. By combining fun and enjoyment with physical activity, we’re here to prove that we can maximize your potential with emotional and physiological fitness.


Multi-level CrossFit

Wake up early and join us for this class, our unique fusion of fitness and fun that’ll have your heart pumping in no time. Among its many benefits, participating helps improve coordination, reaction time, and memory. Sign up now!

Warmup Session

Join us for this class and train your way to a healthy body and mind. These techniques build a strong body from which one can transition into more advanced stages, including a diversity of coordination and modifications to suit a range of difficulties, from beginner to advanced. Book now, and treat yourself today — you deserve it!

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