This style of lunge is actually slightly better than the forward lunge when it comes to building muscle, partly because it's harder to compensate with the lower back, so your form is better.
If your goal is to build your quads, this reverse lunging style also beats the forward lunge, which is better for glutes and hamstrings.
related posts
Don't Let Sickness Derail Your Progress
What to do when the cold and flu hits and, more importantly, how to prevent illness to begin with.
Tip: Prevent Pec Tears with the Floor Press
The floor press prevents over-stretching at the shoulder joint and eliminates an excessively stretched pec tendon at the transition point from eccentric to concentric, thereby eliminating much of the danger-zone for pec tears.
Tip: Something Dumb Personal Trainers Do
Either they're trying to look more advanced than they are or they're just trying something they saw on TV. Either way, this is bad business.
Massive Force
This six-week program breaks some of the currently accepted rules for workout volume and duration. That's why you'll do more than 20 sets per workout and you'll train for 60 to 75 minutes.