5x5 for leg day....

[Backlash]

20 pounds is a lot to add on the 5x5 program, especially if it was pretty tough for the very first workout. You'll move your plateau further off if you just add 10 pounds (better is 5) each week. Especially for stuff other than squats and deads adding only 5 pounds allows you to use a progressive load for much longer...

 

[Debaser]

Squats 5x5
Leg Press 2x8
Lunges 2x8

Is that enough? I'm accustomed to higher volumes on leg day.

If that's not enough you're not working hard enough...I would drop the leg press and do SLDLs rather than lunges. What are 2 sets of leg presses going to do for your legs that squats neglect? If you feel like doing more for your legs after squats, then you're not doing them right. For legs I either do 2 sets of 5 (not including warmups) or 1 set of 20 breathing squats. Either one (especially the latter) leaves me lying on the floor for awhile.

The squat is the single most productive movement out there. They should be worked hard and with all of your focus.

 

[needsize]

the leg press is just a means of hitting slower twitch fibres with higher reps. I've never liked hihg rep squats myself, especially not after doing heavy low rep ones, as its hard to maintain form through a high rep set of squats. And if you mess up your form squatting you could be in for one hell of an injury

 

[Debaser]

I gotcha, why 8 reps though? To hit the different fibers wouldn't 12+ be preferable? 8 just seems awfully close to 5.

 

[needsize]

I find starting with the heavy 5 reps, then finishing with 8-10(I do aim for 10 but the minimum is 8), seems to stimulate me to growth. I also like to finish that last set with some high intensity stuff, ie, hit failure on leg press, pull a few plates then go to failure again....