I incorporate some static holds in my routine here is one example. I lot of the exercises you need to use a power rack or something similar.
bench (in the power or squat rack) : adjust the bar holders to a position where you have several inches to press upwards before the look out position. use a weight substantial higher than what you would do reps with (more than your 1RM). presss the weight to the lock out position and hold for 15-20 seconds. that's it. it builds muscle and tendon/ligament tensile strength.
this method of training can be used for any number of exercises. bench, military, squat, shrugs, dead lifts, close grip, cable curls etc.