cardio heavy days w sprints/how not to lose muscle or weight

[The Conquistador]

I am starting to train for upcoming rugby practice and decided to go to the old HS field across the street from moms while im in town to run sprints (sprint then jog back, sprint, jog)
In doing this I will be using a lot of energy and trying to get my cardio and endurance up but not trying to lose any fat or weight that I have right now as I need to stay where Im at. My guestion is, I have never really incorporated cardio that much and Im wondering how I should go about this as to not lose mass and size while still pushing 100% on the field and running as hard as possible

 

[Kane_Red_Machine]

Yes after a while, some part of the gain you got during years will desapear slowly, but certainly.

by experience, i know than 2 time bodybuilding/week increasing you kcal just these two days, keep your gain over a year... but more.

Now for the positiv, after going in hard kcal burning... the metabolism and then certain the anabolism increase weeks after weeks. and then you will re-gain what you lost more easyer...

 

[JayC]

I am starting to train for upcoming rugby practice and decided to go to the old HS field across the street from moms while im in town to run sprints (sprint then jog back, sprint, jog)
In doing this I will be using a lot of energy and trying to get my cardio and endurance up but not trying to lose any fat or weight that I have right now as I need to stay where Im at. My guestion is, I have never really incorporated cardio that much and Im wondering how I should go about this as to not lose mass and size while still pushing 100% on the field and running as hard as possible

Your plan should work for the most part.. The key is high intensity.. What we do that works great and has minimal effect on muscle loss is just sprint stop. Dont even bother jogging bro. You just wind spring (ALL OUT, NO HOLDING BACK) for about 30-50 yards (approx 10-15) seconds, then you stop and rest for about 5-10 seconds. Then keep repeating. We add it to our fight conditioning when 3-4 weeks our from the fight and basically our trainer gives you 20 seconds to run the required distance (x yards or feet), if you do it in 8 seconds, you get 12 seconds to rest. You do that for 3-5 5min rounds, rest 1 min inbetween rounds. That will put hair on your chest and probably even build your quad muscles

 

[The Conquistador]

thanks man. Thats good info