How do you heal the soldier in warface training

Press LB you will pull out a med kit, hold RT to heal him and LT to heal yourself. If you press LB twice you will pull out defibulators that is used to revive dead teammates while in combat, but you will have to have them charged up to 100% before reviving them, the more you use your med kit, the percentage on the bottom left will drop. Luckily it regenerates allowing you to use it as much as you want.