The debate goes on when it comes to locking or unlocking your knees when

doing the leg press.

I would say do neither. What you need to do is keep your knees straight.

When you are doing the leg press, as you are moving the weight, your leg
muscles are doing all the work. When you come to the end of the exercise,
if you keep your leg straight, the work will be done by the muscles around your
knees. 

If you continue and lock out your knees or even push your knees back, the
work shifts from the muscles around your knee to your knee joint actually
doing all the work. Your knee joint cannot handle the complete load and it
WILL get damaged.

What do straight knees look like for you?  

If you look at the deadlift exercise, when you return to the start, you contract
your gluteus and bringing your hips forward. This is the position where your
knees are straight.  If you look at them, they are straight but there still is a slight
bend in them.

There you go. Next time you hit the gym, find out what "straight knees" looks like
for you.  Then remember to stop before locking out next time you do the leg press
so you work your muscles and not the joint. 

If you're already done some damage to your knees and suffering from discomfort
you can spend a few minutes a day doing exercises from the new Fix My Knee
program to get back on track.

This is your final reminder that the introductory sale price which is discounted
by 35% goes up tonight at midnight.

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Brian