Challenge your abs, hip flexors, and even the neck musculature with this combo exercise. Simply maintain the half sit-up position while performing flyes.
Anchor your feet and lean back until you feel your abs engage. You can use a lighter weight and do the exercise in a timed manner for 60 seconds, or use heavier weights and go for 10-15 reps. Keep your spine and neck as neutral as possible.
There's a difference between mobility and stability. Mobility is the ability to produce a desired movement, while stability is the ability to resist an undesired movement. Knowing the difference is the key to performance.