The T-stabilization is an intermediate stability exercise that trains the entire core, including your shoulder complex, abs, and hips, while helping build endurance in your lower back.
Begin in a pushup position with your hands shoulder-width apart. Brace your abs and squeeze your glutes. Form a straight line from your shoulders to your feet.
Transfer your weight to one hand as you lift the other hand off the floor. Rotate your torso as you reach your arm out to the side and over your head, pointing your arm straight up to the ceiling and glancing upwards at your fingertips. Pause, return to the starting position, and alternate sides.
Do not rotate the arm past 90 degrees. This can create an unstable and unbalance position.