VBT testing, or Velocity Based Training testing, involves using velocity data from lifting performances to estimate strength levels, such as an estimated 1RM. It calculates an athlete's maximum strength from sub-maximal sets by assessing the speed of the lifts. VBT testing is valued for its ability to provide real-time, accurate estimations of strength levels without the risks associated with maximal effort lifts​``【oaicite:9】``​.