EMS on hamstrings and glutes only ?

Is it wise to strength-stim (10x10) only the hamstrings and glutes to help bring them up against the already big and strong Quad ? Or is it better to do all 3 muscles ?

3 muscle groups is the max I can do and stay consistent, I have a 2 channel device(7500 2nd edition) so adding calves, back and abs will take 4 hours…

Thanks !

I train only ham and glutes because i have strong quad. i don’t know if it is bad thing, but i thinkthat if vyou have an imbalance, it work. but 4 hours the total training? or only ems? it looks too long

put it on your lagging muscles