
Ironically, when we look at many strength and conditioning programs for athletes, they never train in the transverse (rotational) plane, which may be one of the reasons we see so many oblique strains and groin pulls. Squats, presses, deadlifts, etc., are all sagittal (front/back) plane movements. If we don't prepare athletes for the demands of their sport, we can't be surprised when they break down and/or don't perform at their best.
Keep in mind that our muscles are slaves to our nervous system and muscles work together in what are called "force couples". An expression that I use often is that "muscles that are wired together fire together." Thomas Myers work with his Anatomy Trains system brilliantly illustrates how we can be broken down into several subsystems.
In the video below, we discuss connecting the Anterior Oblique Subsystem, which consists of the Adductor/Groin muscles and External Obliques/Side core muscles on the opposite side. When creating or controlling rotation, if the workload is not shared across these

One thing to note is that these drills require a certain level of mobility competency in the hips to achieve a straight leg position with the legs at 90 degrees. If you can't achieve this position, take the time to back up and work on hip mobility and correct the Leg Raise pattern first before coming back to revisit if necessary.
Eric D'Agati runs One Human Performance. You can read Eric's blog or find more information on One Human Performance on his site. Eric is also a lead instructor for FMS seminars, including the FMS Level 1 - Movement Experience in Kansas City.