How to "Dumbbell Abdominal Jack Knife" ?


    - Hold the dumbbells palms up, keep your abs tight and knees slightly bent. Lift the legs and arms simultaneously, bring up the weights as high as possible towards the feet.

    Our application for personal trainer allows you to teach the "Dumbbell Abdominal Jack Knife" properly

    With Hexfit, you can create training programs, simple or complex, using our exercise bank which contains more than 10,000. You will be able to send it to your customers by suite via the mobile app.  You can even centralize all the information concerning the follow-up of your clients and the creation of your training programs.