in the last year i have moved from heavy weights to more intense workouts this has brought my hamstrings and quads up to a new level....
Routine 1:
Leg extensions 4 sets
Supersetted with
Stiff legged Deadlifts with DB
Leg press:
6 sets of 10 reps taking 10 seconds rest in between each set(don't get out of the seat)
start with 4 plates a side then if you can go up from their

Lying Leg Extensions:
6 sets of 10 reps taking 10 seconds rest in between each set
Walking Lunges
4 sets 10 lunges per leg (increase weight with DB)
Routine 2:
Lying leg extensions
4 sets 15 reps
Stiff legged Deadlifts
4 sets 15 reps
Walking Lunges
4 sets 10 lunges per leg (increase weight with DB)
Leg press:
Set 1 - 6 plates - 25 reps
Set 2 - 8 plates - 20 reps
Set 3 - 10 plates - 15 reps
Set 4 - 12 plates - 10 reps
Set 5 - 14 plates - 5 reps
Set 6 - 6 plates - 25 reps
now i hear all the time that you should squat heavy and use low reps for legs and yes this is true but if you struggle with your legs and have done this and it does not work why keep doing it??
Try these routines mate they are not easy but that is the point....