The closest thing Ive done to static training was rack lockouts on the flat bench. I believe static is just holding the weight though, not actually moving it, but could be wrong. The lockouts had maybe a 2-3 inch range of motion. Those were somewhat useful for helping with my lockout strength. Didnt find them necessary, they seemed to be more detrimental when I was hitting 545x5 reps. I couldve kept increasing the weight but the pressure on the wrists and joints, and even my back didnt seem beneficial at the time. Especially while I was in the process of herniating some disks. Personally Id stick with full range training for the most part. Ive seen some who train with tiny little movements using very heavy weight and they never look any different year after year. I do like to hold a contracted position though, during sets or at the end to get that extra blood in the muscle. I wouldnt do static training on its own though.