Just to qualify the following statements, I run a kettlebell gym [have done for 7 + Years], trained personally with Kettlebells for over 10 years [Good ol' Stan the Man back in the UK made my my first ever KB]...did my first KB Instructor cert in 2009.....then earned my KB instructor cert with Dan John and Pavel at Strongfirst [well why not, two of the biggest names and when I saw they were running the KB intructor cert in SLC, it had to be done]
So I have a wee bit of experience........
My answer.................. It Depends
Actually, if you look at the KB, unless you have really small hands, typically you end up with 'pinkies' out on a 2H Swing..... or your fingers are crammed inside the handle.
A 2H swing is a foundational move, and there is really nothing wrong with it, [its great for power production, great for building the posterior chain including muscular endurance] other than what has been said above....... however if you have the 2H swing down, [Hip hinge, shoulders packed, Hip extension at the top and breathing] then moving to 1H is very simple, and I would recommend that most people give it a go...... with a couple of pointers to remember.
- If you can swing a particular size KB 2H, then you can usually swing it with 1H [You may not swing it as high, but it's the hips / posterior chain that provide the momentum..... and you still use both of them in both 2H and 1H.....so don't think that because it's a 1H swing you have to go a lot lighter]..... however be sensible with this.... swinging the beast 2H.... may not be the most sensible for swinging 1H for reps
- However, before proceeding, ensure the shoulder remains 'packed'....... ensure the shoulders stay square, don't do a big rotation.... the 1H swing is an awesome anti-rotational exercise.....it works the grip more as you are now holding with 1H [and the momentum generated on the downswing element is of course quite that much more than the weight of the KB
]
- Remember the hip hinge, full hip extension at the top of the swing [think Plank position], packing the shoulder and breathing.
Once you have given the 1H swing a go, and get comfortable with it, it is a great boost to the arsenal....... then you can get fancy and do H2H swings [Hand to Hand]...great for coordination, great for working that anti rotation, and keeps things interesting when you have sets of 10 - 20 to do.
Andrew Read is a great guy, and if you google him he has some great articles on the 1H Swing [as well as almost every other facet of training - indeed it was AR who was one of my biggest influencers on Aerobic training over the last couple of years. [which was then reinforced by KB]
Hope that helps?