An easy way to increase the eccentric (negative) loading is to do the concentric or lifting part of the rep with both legs, then the lowering part with one leg. After you hit failure with the single-leg eccentrics, continue the set by using both legs and a controlled negative.
Alternate legs on each rep. Make sure to do the eccentric portion in a controlled fashion to take advantage of the overloading effect. Don't just let your leg freefall when lowering the weight. Do 4 sets of 8 reps.
related posts
Tip: The Full-Body Core Exercise
Here's a high-tension ab exercise that trains a lot more than just your core.
The Best Way to Keep Getting Stronger
Strength gains stalled out? Use this powerful progression method to build stronger muscles and tendons so you'll never plateau.
Waterbury Rules
At first glance, it might seem that the title of this article is a double entendre (you know, like "Kid Rock Rules!"). I assure you, it's not. My linguistic reference of choice is not a music-challenged snowboarder but the Oxford English Dictionary, or for all you acronym lovers: OED.
Tip: 10 Training Rules for Athletes
Think you're an athlete? Want to be? Here's what will make you one.