The COREFX Whiplash is a great fitness equipment tool designed by COREFX to rapidly develop speed, strength and stamina. The COREFX Whiplash is extremely popular for MMA training, personal training, sports conditioning and boot camps because of its compact size. The COREFX Whiplash takes velocity training (the core of battling rope training) and combines it with resistance training for one of the most intense personal training sessions any piece of fitness equipment can offer! That s why personal trainers and elite athletes all over the world are using the COREFX Whiplash, the alternative to their big brother, the COREFX Whiplash XT. The COREFX Whiplash combines the benefits of velocity training and resistance training in one, compact package that s half the size of the original COREFX Whiplash XT - each COREFX Whiplash is 10 .