I think you could get a lot out of heavy kettlebell swings as a simple technique for training explosive hip power. For rugby this would carry over into both sprint speed and power into the tackle without having to spend the time to learn the complex moves for olympic type lifts.
Kettlebell Swings For Power
This is a good point.
1) Kettlebell Swings are an excellent method of developing Power.
However, the main isssue is the majority of individual don't perform them with enough weight. More on that in a minute.
2) Kettlebell Swing provide an element that Olympic Movement don't.
a) Kettlebells have an Eccentric Component that Olympic Movement do not.
b) Kettlebell develop the Stretch Reflex more so than Olympic Movements.
Allowing the Kettlebell to drop back in to the hole, then bounding and exploding up with it.
3) Since the Kettlebell Swing is a simpler movement, it is quickly learned.
Kettlebell Swing Loading
For optimal Power Training, individual need to perform Kettlebell Swing with between 50 to 100% of their body weight.
Example
An individual that is 200 lbs needs to perform the Kettlebell Swing with between 100 to 200 lbs.
Are Heavy Kettlebell Swings Better Than Deadlifts? | T Nation
Dr Bret Contreras research demonstrated that Heavy Kettlebell Swing are necessary for Power Development.
The Hungarian Core Blaster
The Hungarian Core Blaster is desigened for Heavy Swings. It is cheap; the cost to make it is around $20.00.
It is also adjustable. You can increase the weight, as you like.
I used 175 lbs on some of my Swings and need more weight.
The Hungarian Core Blaster requires a wide stance allowing you to drop the weight back into the hole.
Another method that allows for a narrow stance is...
Dumbbell Swings
Holding Dumbbell at your side, swing them forward and allowing them to drop back works.
Kenny Croxdale