A good drill for the glutes, the basic bridge also helps stretch out the hip flexors which get short and tight when confined to a chair all day. Rather than passively perform this exercise engage the mind-muscle connection to fire your glutes as hard as you can! Lie on your back, knees bent and your feet flat on the floor. Squeeze your glutes to lift your hips off the floor. Continue until they are fully extended… your butt cheeks should be squeezed tightly together! Pause in this position before lowering your hips towards the ground and repeating. Avoiding arching in the lower back.