[quote]BFGarrett wrote:
Why do people say single leg loading can’t be even close to bilateral loading? When I do walking lunges, I do it with 185 lbs on a barbell for 10 steps (5x per leading leg). If we pretend only one leg is doing the work, that would correspond to a 370 lb squat for 5 reps. Hell, that’s ignoring body weight, since I was really using one leg for bodyweight + 185 lbs. For two legs I should do 2x bodyweight + 370 - lower-leg-weight = something in the 500’s. However, my 1RM isn’t even 370 lbs (working on it, sorry).
Now, one obvious conclusion is that I’m using both legs to some extent during walking lunges, and this is certainly true. Still, one leg does more of the work (actually, after a certain point, the back leg lifts off the ground, so the lead really is doing all the work then), so we inevitably conclude that this unilateral load is a significant portion of my bilateral loading.
Not trying to claim the squat isn’t king, but not everyone doing lunges is doing it with 5 lb dumbbells (just most everyone at my gym). So, am I missing something, or is there more to the unilateral load << bilateral load thing?[/quote]
a vertical jump is bilateral…
a lunge is unilateral…
specific transfer of a unilateral lift to a bilateral explosive movement is less than bilateral lift transfer to bilateral explosive movement… all this means is that the motor program for vert is more easily integrated with the motor program of squat… optimizing motor programs is very important in performance training…
you can’t imagine that 185 on one leg is 370 on two legs… because it isn’t… 185 on one leg is 185… if your max on barbell lunge is 225, and your max squat is 325, the 325 squat will require more muscle mass to be recruited, since there are two limbs now receiving maximal impulses, because of course the load is higher…
there exists a bilateral strength deficit, the ability to reduce this bilateral strength deficit will in itself help improve vert… why? because you’re improving the amount of force you can produce bilaterally, which is specific to a VJ… it’s easier to stream a shitload of impulses to one limb in less trained individuals… people with high levels of experience with weight training bilaterally will shatter that though.
barbell lunges and barbell stepups are great for sprinting and single leg verts etc though…
peace