yeah im playing rugby at school and my ball skills are fine but i just seem to get out muscled and push off the rucks. what should i do, btw im training 4 times a week not including weights. any help with my problem would be appreciated.

Number 4 = Second Row
 
this position is changing. It used to eb a case of the tallest guys playing htere but now we are seeing big powerful ball carriers, just look at Danny Grew**** the England Number 5...
 
You need to look at why you are being pushed off the ball. Dynamic explosion is needed, as well as time and good technique. You need to hit the ruck hard and fast and preferably with a partner. Smash whoever is in the way and seal the ball so that your team can recycle it.
 
In terms of drills, take a look at the training page on www.scrum.com and in terms of weight training have a look at doing some cleans to boost explosiveness, as well as some plyometric training.
 
Hope this helps, feel free to ask any other questions.

that would be right lock i think
 
usually a taller and stronger of the two locks.
 
SQUATS...... and bulking exercises: deads and so on.

not necessarily right lock...4 and 5 are interchangeable, and size and strength of locks is determined by game plan as well as physical abilities.

I.E. If you are playing a rough forward orientated game (eg England) then you would go for two big burly second rows e.g. Grew**** and Borthwick...

If however you were playing a wide expansive type game that required quick ball in order to create gaps (eg New Zeland) then you would have more skilful and agile locks, eg Ali Williams.

I don't think there is a particular requirement for a number 4 in comparison with a number 5...both are second rows...

When it comes to the scrum, positions can be changed round depending on the strategy for that scrum, eg by stacking one side with the heavier flanker/second row and shifting the number 8 across in order to create a wheel.

Lots of different factors to consider. My advice as above is to work on your technique and your power...bulking exercises are all well and good for building mass, but without good technique and explosive power, size counts for nothing, and nowhere is that more apparent than on a rugby field. Also consider your fitnees. You need good aerobic and anaerobic capacities to compete for 80 minutes....work on these big time...something like HIIT is a good start.

Hold off on the bulking and plyometrics until the off-season, and ensure you do a good active recovery session (eg swimming) after every game.

When you get to a ruck actually when u walk onto the pitch you must be as aggressive as u can. You must hit that ruck as hard as possible if there is someone in the way then u ruck the hall out of him . watch the all blacks play try play like that . Ur core and ur upper body are the main muscles at a ruck.

I think that leg power is more important than that, as is your technique. You are looking to drive someone off the ball - you do that with you legs, just like when you block in football...