Trying to get back in shape

[Kingair]

Trying some new routines since a squat induced back injury put me on the sidelines for about 4 months. Posting a few pics for critique. Any thoughts on the best way to keep legs in shape since heavy squats aren't part of my routine now?

[Jabberwocky]

where are the pics?

[Kingair]

The ones I posted werent that great - gonna try to do a little better - will post soon.