And making a serious mistake by doing that. The only advice I'd give you is to toughen up and do your legs more than twice a week. Your shoulders are already more worked from other upper body work, if one bodypart needs to be sacrificed, it should be them, not the wheels.

Okay, I have to throw in my $0.02 here....

I used to absolutely love BB squats mainly because my legs responded very well to them in terms of strength and mass gains. I never really liked lunges; I found them awkward and I thought that the timing and balance were weird.

All was well until I sustained a pretty bad knee injury. For months, I couldn't jog, walk, or even stand without some level of pain. Even now (several months later) I have to be *very* careful to avoid moving my leg through the sweet spot that flips the agony switch to ON.

I've only recently regained the confidence in my knee stability necessary to do leg workouts. To make a long story short, my beloved squats are out of the question now; my knee complains almost immediately and I have to put the weight down and stop. Lunges, however seem to be OK; I was feeling the good kind of pain the next day, and my fragile left knee had no problems.

So, I'm voting for lunges as my preferred leg exercise of the two.

BTW, Magnus, if you're a "high rep, low weight" guy like me, give wall sits a try. If you can do 500 squats (ridiculous imo), you can probably break the wall sitting world record (~11 hrs if I remember correctly).

ahah, you can say that again.
11hours... damn... that's a whole lot of time. what did the guy do for that whole time? i'd bring my guitar over xD

OH dang, 11hours wall sit. Then it means if he/she do horse stance challenge then all the kungfu masters have to kneel.

Amazing Guinness World Record Broken for Most Squats (See The GWR Longest Wall Sit)	DQ

The video.... it doesn't look like a squat to me. Leg is so wide apart and only halfway down, and use hand to support. Though, it is impressive.
To me a real squat is ass touch calves and hands behind the neck.

tried them and they work fine...but not that fast, that cant possibly be healthy? hmm, maybe start doing those...

I can't say for sure because I don't know your exact goal.

-If your goal is to get stronger leg and more explosive power - then sure it is overtraining. You should not train a body part 2 days in a row with high intensity (sprinting and heavy weight squat). You'll soon feel that the tendon and joints will give in because of the micro traumas such strength training put on with lack of recovery . I would recommend doing 2 days or even 1 day of Squat only with heavy weight.

-If your goal is to build leg for more endurance - it is fine to train everyday. Because it is normal for any soccer player to train on the field everyday (or even twice a day).
But here it's my opinion: it's pretty pointless to train for high reps squat, because with running and sprinting on the field you already build good endurance for legs, what you want to do with squat is to increase leg strength - and that is to go heavy weight. Do heavy squat, 1 or 2 times a week.