to make rugby conditioning real simple you need to fart lek either on arunning track a rower or in a pool. if you then incoportate burppees/ mountain climbers/ box jumps into the rtest periods you will be there. as well as a single 40min run per week.
so fitness should be 3x week. i as above is a single run and two are fart lek sessions mix them up
e.g. weeks 1-4
session 1
500meter row x 15 with 30second rest this will work out at the start to just under 40 mins (the length of a half).
aim at start for less than 2 mins then once you have done 15 allowing initially for a 30second rest period and then gradually knockin this down 5 seconds each time till rests are 15 seconds long start to aim to knock 5 seconds off of each ‘sprint’.
then once you are at 15 seconds breaks and doing the sprints in sub 1.40secs. addin some extra conditioning depending on which muscles are not sore from your lifting schedule.
e.g. if legs are not sore do 10-15 box jumps straight after the row. then take your rest and repeat. if legs are sore but chest isnt do push ups. if back isnt sore do chin ups. if nothing is sore clean and jerks or snatches are good.
then sessions 2
will be starting at 400 meter runs aim to get sub 1min with 30seconds rest doing 25 of them before you start to decrease your rests.
this is tuff mentally more than anything. when starting you need to see what you average 400meter time is an adjust the amount accordingly. so if you are averaging 1min 30secs (still take the 30 second break) but aim for 20.
i.e. never go for longer than 40mins and never have longer than 30min rests. it will come belive me.
once you are at this level then as above add in other exercises after the sprint and before the rest or before the sprint.
for an alternationt o this dya and belive me one that will make you puke is to do this up and down hills. if you are then make enough piggy back some one of your weight up and down hills. it is what we had to do in the off season at the end of every other training session.
session 3- swim 50meter sprints and 20 sec rests. and continue. tbh this is always my weakest i am a pretty poor swimmer in comparision to running and rowing so time so i aways did very poorly in this. but i liked to incorporate it. push yourself set your times and distances and breaks and then add in the extra work before or after the sprints. put press ups are clearly the safest option as the pool is wet so you dont want to be jumping about the place. if you get me.
well that was my off season conditon programme it beasted me reguarly i can rmember main row/ sprint sessions i didnt puke but hell i was never ever out of breathe on the field.
In terms of strength i dont know how you going but clealry you should be building core strength in bench, deads and squats for the 2-3 months after the season then for the 2-3 months before the next season pressuming that the off deaon in america is 4-6months use your strnegth to imporve the clean/ jerk and snatch/ nox jump aspect of your training. with low to medium repage and shortening the rest periods closing in on the season
hope this helps. i played in a top rugby academy in the uk but quit to do pre-med (i think that what americans call it) and then only played college rugby form then until now.
hope it all goes well and tbh it is the best hgame youw ill ever play.