Leg Extension Tip

Your muscles can be more than 25% stronger on the eccentric than on the concentric portion of a rep.
If you want to overload the eccentric portion of a leg extension but don't have a partner try this: (also works for seated row with a V-Grip)
1. Use both legs on the concentric
2. Use only one leg to lower the weight
3. Alternate sides until you can no longer control the eccentric for at least 3 seconds
4. Hobble home