Speed Agility and Quickness sessions will help athletes become stronger, faster, quicker and more powerful for their respective sports. These fitness characteristics will be improved through specific movement patterns, reactivity, rotary power, balance, acceleration and deceleration drills, rapid excitation and speed and conditioning drills.
You and I have said the same thing for the most part. On a macro level, yes certainly, SAQ equals fitness. But the fitness I am referring to = anaerobic/aerobic endurance which is different, with the key word being endurance.
1. "the condition of being physically fit and healthy" which is what you are saying and as I've said is not wrong.
Regardless, the discussion here is "should fitness be done for young players." We've all said yes. I say get the ball involved. Which I assume everyone agrees with. Then the discussion went to SAQ, and I don't think anyone argued against that. But when you have limited sessions per week it's difficult to decide how to prioritize training. If kids were at the park every day practicing with the ball then having them do SAQ at one of your team sessions is wonderful (my club offers SAQ every 2nd week and I highly encourage my players to attend). But the kids are not at the park every day so I say "get the ball involved."