Kick (Regular) - regular kickboard kick or kick on back with hands over head, fingers locked.
Loosen (Swim) - just means easy - 'loosen up', whether it be easy free, back, breast.
Depending on where you are in your off-season training, this is your weight training day. Use this day to also get additional 'Core Strength' exercises in for a total of 2-4 sessions per week. See Core and Strength Guidelines for more information.