The nickname for the 2.13 m zone right at the net. You may not take the ball out of the air there — and your follow-through must not carry you in either.
The zone between the net and the baseline. You are too far back to volley and too far forward for deep balls, so you spend as little time there as you can.
The serving team's first shot after serve and return: soft and high into the opponents' kitchen instead of hard — it buys you the time to move up to the net.
In padel the ball bounces first, then you strike it below hip height into the diagonal box. In pickleball the rule is: below the waist, paddle head under your wrist.
General
Terms from training theory that apply in every sport.
BMR is your basal metabolic rate at complete rest; TDEE is total daily expenditure including everyday movement and training. Nutrition targets always work off TDEE.