Front Box Jump | Anatomical Analysis We added 5 new Plyometrics exercises to the Strength app, here is one of them, the Front Box Jump. Plyometrics, also known as jump training or plyos, are exercises in which muscles exert maximum force in short intervals of time, with the goal of increasing power. Explosive strength is defined as the rate of force development (RFD) at the onset of contraction. Instructions: Swing your arms back behind sides while squatting down partially. Rapidly swing arms fo