To our luck, there have been made third-party studies about neutral and movable grip options compared to fixed supinated and pronated grips.
Unlike the traditional form forced upon you with a typical deadlift bar, researchers found that a neutral grip (which you can do with an Angles90) resulted in more strength and explosiveness compared to conventional deadlifts with a straight bar.
Study: https://www.ncbi.nlm.nih.gov/pubmed/21659894 ; https://www.ncbi.nlm.nih.gov/pubmed/26840440
If you train solely a certain exercise, your performance will only increase for that specific exercise. This means you won't get better at other movements which require that same muscle. So, if you are only exercising pull-ups in the overhand grip, you will likely not see that result at other grip angles. With the Angles90, you can add dynamic, whole-movement training to your workout.
Study: https://www.strengthandconditioningresearch.com/perspectives/partial-squats/
In comparison to overhand grip pull-ups or underhand grip pull-ups (also chin-ups), researchers revealed that using a rotating grip instead, activates your lats more intensively. In addition, you tend to have more strength than in the other two grip methods. With the Angles90, you can do all of these grips!
More than 10 studies have found that resistance training can lead to a wide range of shoulder injuries. Approximately a third of all gym-goers currently struggle or used to struggle with this issue. The causes can be many. Focusing on the wrong grip positions is one of them, which the Angles90 can help with!
Isometric resistance training challenges your muscles with other stimuli better than isotonic training/ conventional hypotrophy training does. Compared to the latter, isometric training keeps your muscle under permanent tension, so you work out harder in less time.
Study: http://www.physiology.org/doi/10.1152/jappl.1984.56.2.296
