Figure 3. Energy distribution of sEMG signals during countermovement jumps. The color gradient in the legend transitions from blue to yellow, indicating amplitude levels from low to high. rectus femoris (RF), vastus lateralis (VL), vastus medialis (VM), semitendinosus (ST), biceps femoris (BF), gluteus maximus (GM), tibialis anterior (TA), and gastrocnemius lateralis (GL).