Condition (loose) - Physical 2 | Speed 1
Condition (normal) - Physical 3
Condition (strong) - Physical 4
Strength training - Physical 4 | Mental 1
Jogging - Physical 1 | Mental 1 | Speed 1
Header - Heading 3 | Mental 1 | Goal Instinct 1
Long Shots - Free Kicks 1 | Shot Power 2 | Shot Technique 1
Box Situations - Goal Instinct 1 | Ball Anticipation 1 | First Touch 1 | Heading 1 | Cleverness 1
Sprints - Speed 3
Game Situations - Goal Instinct 1 | Ball Anticipation 1 | Heading 1
Duel - Duel 2
Defensive Behavior - Ball Anticipation 1 | Heading 1 | Duel 1
Passing - Passing 2 | First Touch 1
Technique - Passing 1 | First Touch 1 | Shot Power 1 | Shot Technique 1 | Duel 1
Attack Behavior - Goal Instinct 1 | Ball Anticipation 1 | Passing 1 | First Touch 1 | Shot Power 1 | Shot Technique 1
Game Systems - Ball Anticipation 1 | Passing 1 | Cleverness 1
Training Game - Goal Instinct 1 | Passing 1 | First Touch 1 | Mental 1 | Cleverness 1
Game Enjoyment - Goal Instinct 1 | First Touch 1 | Mental 2 | Cleverness 2
Agility - First Touch 1 | Speed 1 | Mental 1 | Cleverness 1
Penalty - Penalty 3
Free Kicks - Free Kicks 3
Corner Kicks - Ball Anticipation 1 | Shot Technique 2 | Heading 1
Coordination - Goal Instinct 1 | Ball Anticipation 1 | Mental 1 | Cleverness 1

Energy is a special value. It's absolutely normal for this value to be low during the season. You need this value as a cost you pay for training. So, if your energy is 0, you automatically train at the lowest intensity. On holidays and days off, the value recovers. The Personal Coach optimizes the fitness value to about 20, leaving some space until 0 in case something happens.
The higher the value for effort and each special training, the more freshness is lost.
So, it's important not to let the freshness go to 0. If you have no freshness left, special sessions are ignored, no special skill training is done, and regular training is at a low flame.

In games, the focus is on the physical value, not on energy or freshness.