Mountain Bikers have muscles and muscles have fibers. Being able to quickly react to changes in terrain on the trail happens because your muscle fibers fire at quicker speeds. The more fibers that are used the faster on trail reaction times you have, but you have to intentionally train your muscles to access these fibers.
That's where the Balance Trainer comes in - as you rock back and hold that static balance position, your muscles are training to tap into fibers on the upper and lower back, thighs, hamstrings, calves and arms. Over time, you train your body to tap into muscle memory to be able to react to terrain on the trail accordingly without even having to think about it.
To make things even better, the Balance Trainer doubles as a service stand and a wall mounted bike rack.
Check out the balance trainer/service stand combo and elevate your ride.