Matthew Griffiths

Matthew is an education provider and personal trainer within the fields of health and fitness. Matthew is an ambassador for CASALL sportswear and spokesperson for POLAR heart rate monitors and VIVOBAREFOOT footwear.

He has presented his ideas in over 20 countries at events such as Asia Fit, Ihrsa, and Filex. 

In 2012 he developed 70 workouts for the app CASALL T.O.D - Training of the Day which now has over 100,000 users. Matthew co-developed the CASALL HIT concept and is featured in the CASALL H.I.T Iphone training app, which recently was updated with new exercises and workouts. Matthew has also been used as a reference in several books and publications such as ELLE, Men's Health, Vogue and Women's Health.

Matthew is an educator for AFPT the Norwegian PT School and has produced body weight on-line workouts at

What’s your best training tips?

Trade Steady-State Cardio for Interval Training

The road to a better conditioned body isn't a long, slow march. It is with bursts of high-intensity effort paired with slower, recovery efforts. Fifteen to 20 minutes of interval training performed like this can give you more benefit than an hour of traditional, steady-state cardio. Giving more back for the time you put in!

Favourite Casall tool and why?

Medicine ball

The diversity of this training tool could probably serve as one of the best functional training tools ever. It can strengthen your individual weaknesses, allowing you to move more freely and powerfully in the real world, inspiring you to create countless exercises and workout drills.

Medicine balls can be used to strengthen and tone the body in the full spectrum of 3D motions. It challenges our bodies to find stability and mobility in positions not commonly trained in the gym atmosphere but seen countless times in sport and the real world.