You need power and balance, due to the majority of contesting rucks and mauls... As the game is really physical you'll obviously need power to dominate your opponent and balance to hold your own
The definition of power is Speed X Strength OR performing strength movements quickly
Tackling someone hard (strength) and fast (speed) is more effective than just hitting them with stength.
You have to tackle them quickly so that they don't get away and to tackle you need strength.
So you need Power in Rugby!
Rugby is a very competitive sport, the hits the rugby players get will probably snap a footballer in half, so they need the power 2 deal with the damage
When running carrying a ball, holding on to another player or tackling balace helps maintains the players sense of direction, special awareness and mobility skills.
James hook
It's hard to say, generally soccer players all need to be very quick, but in rugby some players do little running. Brian Habanna is probably the quickest rugby player in the world and may be quicker than Cristiano Ronaldo when running, however a 20st forward would be slower. The quickest rugby and soccer players may be similar, but the slowest soccer player would be quicker than than slowest rugby player.
Balance is important for a Rugby player so that s/he may remain on their feet in a ruck, remain standing when tackled, and perform moves such as side steps.
There is just about always a need for pro football players. just like there's a need for professional players of any sport. Football players in EPL in England have been pro for decades, while Rugby is only last 10 years.
David Skrela, Sebastian Chabal, Frederick Michalak need more?
No player would wear shin pads in rugby, there is no need for them.
Rugby players have a tough training. rugby players need to be 'big and strong' and so a high protein diet is necessary for 'growth and repair.' If you train, you should eat protein afterwards so your muscles can repair, and in laymans terms, it gets your muscles bigger.
Rugby boots need studs in order to offer the player grip on grass and mud, which can be slippy.
This would depends on how much money each rugby ball costs, so you need to be more specific.
To balance 5kg, you would need 5 kiil grams.
well its the same question as why would you need balance to ride a bike. because if you dont have balance you wont get very far.
get quick strong players with descent hands and are very creative when it comes to attacking play. also you need players capable of commiting to there tackles and who are able to counter ruck in order to win balls for the backs