Single-leg pistol on the dome with the straps for control.
Use the straps just to balance, let the working leg drive you up.
A pistol squat asks one quad to lower and raise your entire bodyweight through full range, and doing it on the dome adds a shifting surface under the only foot you have. Your glutes stabilise the hip and assist the drive while the straps give your hands just enough reference to keep the free leg extended out front. One side at a time, it earns its place as a peak single-leg strength and balance expression, made trainable by the TRX assist.
Actually, the straps make this a smart place to learn. They let you control the descent and assist the sticking point just enough, so many people find TRX pistols before free ones. The dome then adds challenge as you improve.
Enough to balance and survive the sticking point, no more. The straps are training wheels, and the goal over time is lighter and lighter hands until the leg does everything.
Holding the leg extended out front takes hip flexor strength and hamstring flexibility most people have never trained. Let it bend slightly for now and extend it further as the squat gets stronger.
