Isometrics are one of the most convenient and effective methods that you can use for maximal strength training. (ashotofadrenaline.net)
If successful, then a load - RPE relationship could be used to regulate the intensity of training loads for ERT with older adults, allowing the elimination of maximal strength testing. (lift-heavy.com)
All of these methods increase neuromuscular efficiency and will therefore increase maximal strength as a byproduct of improved contractile functioning. (blog.trainheroic.com)