If You like do crunches You try do different varieties. You need have only 7 minutes for all training. These crunches are: Frog crunches, Altered bicycles, Bicycles, Modified crunch with tap, Reverse crunch, Star crunch.
If You like do crunches You try do different varieties. You need have only 7 minutes for all training. These crunches are: Frog crunches, Altered bicycles, Bicycles, Modified crunch with tap, Reverse crunch, Star crunch.
