endurance and strength in the legs

[KevK]

you have a variety of different muscles in your thigh, so you need a variety of different squats to work them in different ways.

Why not bike, run and Squat?

Actually thats damn good advice. But if I had to choose one or the other, I'd pick none. You should sprint if you dont wanna squat. Bikings ok, but your not gonna develop explosiveness, just endurance.