[quote]isis07734 wrote:
With the same medium-light KB weight, do you think the swing would work more than a fast paced, but safe DL, or straight leg DL?[/quote]
This is a interesting question, but I suppose the answer depends on your goals.
For me, I view the KB swing as a conditioning movement. The Deadlift is a strength movement. Each has their advantages and their place in my training. I’ll use my workout last night to illustrate.
My top set on deads was 475x7. When I was done with that I was drenched in sweat, seeing stars and sucking gas for a good minute. My goal with those was to equal or better past efforts at that weight, which I did by doing one more rep than I did the last time I loaded the bar to that weight. Mission accomplished.
I did one set of 50 swings with a 50 lb kettlebell at the very end of my workout. I was already drenched in sweat and had put quite a bit of work in, so my goal with those was an explosive hip drive, an elevated heart rate and to do as many as I could in a set. Mission accomplished.
Kettlebells are great, but they are not a substitute for holding a very heavy weight in your hands and loading up your entire musculoskeletal system with hundreds of pounds. Even for a beginner, chances are you do not have access to a kettlebell that comes anywhere close to what you can deadlift. A 50lb kettlebell is as heavy as I can get my hands on, whereas I have all of the plates I will ever need for pushing my deadlift strength as high as it can go.
Your body will respond to those stimuli in a much different manner. There is no real substitute to loading up your spine with ridiculous amounts of weight. But that’s not what a KB swing does at all, so I don’t really see them as being at all comparable.
Now, I could probably load the bar to, say, 315 and bang out a ton of reps on a deadlift set and call it conditioning. For me that is a light weight and I could probably get 15 or so reps, maybe more (I’ve never tried). I also believe that such an approach would put me at an unreasonably elevated risk for injury, which is why I always stay away from high-rep deadlifts. 315 is still enough weight to damage my body if my form breaks down, which is almost a given on a high rep set.
Why bother with that, when I can just deadlift heavy and swing my kettlebell to get the heart pumping?
That’s my $0.02 on the matter, but my goals may differ from yours.
Edit: Having re-read your question, I think you are asking about swings and deadlifts with the same weight. My answer to that is swings, all day. Even if I had access to, say, a 135 pound kettlebell, I would get much more out of a set of swings at that weight than I would a set of deadlifts at that weight.
I deadlift 135 for 5 as a first warm-up set as I work up in weight. That’s it, a trivially light warm-up. It is far too light for any kind of deadlift work set. Swings with a 135lb kettlebell would be a much more challenging movement, no doubt about it.