At what point does running become counter productive?
I've recently started running to get better running endurance and speed as I'm leaving for a one year military service in August.
In my country, all new recruits have to go through a bunch of physical tests as well as a 3000 meter test, to then later be grouped in one of three groups, group 3 being the worst and group 1 being the best.
I'm pretty interested in doing a tough and interesting year in the military, so I'm trying to score as high as possible on these tests, so to not be sent to a boring and slow position during my one year military service.
As for running, I started with running longer distances at lower intensity once a week, as well as doing intense 4x4 intervals with 3 minute light running between the intervals once a week.
Lately, I've upped the frequency to two longer runs a week, and 4x4 intervals once a week.
To get the highest grade for running, you have to complete the 3000 meters at a pace of 4:00/km or 12 minutes or lower. I tested my 3000 meter pace yesterday and ran it in 12:45 minutes. Therefore I was thinking I could maybe alternate between the 3000 meter test and the intervals every other week, as both serve as tough, short and intense running sessions mostly to increase VO2 max and learn to manage lactic acid buildup.
I really don't want to become prone to injuries, so I've been taking it slow. People have told me though that I should just be running every day, and that there's no chance I will be injured, and that it doesn't make sense for me to not push myself to the max every time I'm running, which is the opposite of what I've researched. In my head, too much volume = counter productivness (unless you've been running for many years and your body is used to alot of volume each week)
I understood it's best to take my longer runs at a medium to slightly high intensity, and reserve those intense runs for sessions like intervals, and have rest days in between so to get more out of each session when I do run.
Do you guys think my current plan of two longer runs a week and one intense, shorter session a week is too little, or is my current plan effective in training both stamina and speed?