But if you're going to do 30-45 minutes of LISS, I'm not sure swinging is the best tool for the job.
I know I can't come close to continuously swinging for 30 minutes straight without crossing the lactate threshold, which means you're getting out of Zone 2.
One might argue that this is a conditioning issue, and it might be, but I can row continuously for 30 minutes, which is also pulsatile, without the same issue.
I guess there's a question about whether it's good enough.
I've been able to sample some light snatching (snatch walking 16kg actually gets me huffing and puffing pretty quickly).
I've been able to sample some single heavy reps, that are spaced close enough to elicit a relatively steady elevated heart rate. (Clean+press+squat 32kg- or Long Cycle 40kg)
I guess - what I actually haven't tried is using swings.
my experience tells me that if there is one, the cardio effect is non-zero and can help with some of those attributes.
to what extent?
I don't imagine it'll help me much with a marathon pace.
but, one of my favorite tests- the kid carry, has been positively augmented by these (substitute-cardio) moves.
swings - for whatever reason is something that I haven't tinkered with - but is obviously an option for cardio substitutes- vis a vis: Strong endurance.
I may try and incorporate some swing training.
e.g. : light cardio for me would be the 24kg - sets of 10 - performed frequently enough to keep the heart pumping.
Goal for the session would be time - not reps. 20 - 40 minutes on the timer would suffice.
a heart rate monitor would make that range of timing the sets easier to control.