There are so many exercises better than both the traditional back squat and leg press.
Cycling sprints up a steep hill, will tend to add more hypertrophy to quads and upper thigh mass than squats.
Atlas stone lifts (and its variations) can enhance posterior chain power, significantly better than any barbell squats. Try them if you dont think so. If you don’t have Atlas stones, then use sand bags gafa taped together, or just put weight discs on a sleeve.
http://www.youtube.com/watch?v=BTNKg_TGmEY&feature=related
For quadriceps, you could try hack lifts with a barbell. (not hack squat machine).
http://www.youtube.com/watch?v=64PFHtq5XO8&feature=related Just use more weight than she’s demonstrating with, lol. You’ll use a similar weight loading in hack lift to what you would use in a barbell back squat.
Dorian Yates was a succesfull bodybuilder in the 90’s, and did not use squats (bcause of some hip issue he had) and it did not prevent him from developing one of the best legs of that era.
Podium deadlifts (of a podium atleast 8 inches high) will develope more hamstring mass than squat and leg press combined. But don’t use a snatch grip, as you might fatigue the upper back before hammies. Just use a straight down dead hang grip, and off a higher podium. You can use significantly less weight than a conventional dead from the floor, and still get more hamstring involvement.
Even smith machine squats can develope the quads as well as a barbell squat.
Depends what part of the thigh (or all of it) you are trying to strengthen.
I might add Bob Hayes to Fogelsons list. Even though Bob did not officially run sub 10, he ran 10.0 on a cinder track with comparatively heavy spikes on his feet. Plus a storming relay leg.
Konstantinos Kenteris ran 19.85 secs in to minus 0.5m headwing for 200m, don’t know if that counts.
Christopher lemeatre’ of France, ran 10.04 secs as an 18 year old junior, without weights. Though in a one of test, some one said he only powercleaned 50kg. Very skinny sprinter.