What is the best way to prepare physically for Infantry OSUT at Fort Benning?

Work on your legs they are the most important (run, deep knee bends, etc). Your lucky the new 22 week Infantry OSUT course starts October 2019. So your going to fall under the older 14 week course instead. Also, arrive within weight standards. Pushups try to get to 40-50 in under two min before you ship, Situps same thing. They will ramp you up after you get there but if you arrive and can't do at least 30-35 in both events and at least pass the 2 mile run your going to be in sad shape for the PT Test plus your going to be even more tired at night attempting to catch up. Much better to arrive at OSUT meeting the standard of PT than arrive below the standard of PT. First 30-40% of OSUT you will be sleep deprived for most of it due to all the physical activity during the day. Think for a min, doing your run, situps and pushups at home then having to drop for pushups like once an hour. Then having to do obstacle courses, close combat drills and the like. Your going to be actually running and doing pushups almost the whole day sometimes. So the better shape your in when you arrive the better off you will be. OTOH, My Nephew arrived in 2007 with almost no preparation but he was in OK shape and he passed OK. So it depends on the individual as well.

I graduated OSUT august 17, 2018. Your best bet to get prepared is run. 30/60s (Sprint 30seconds wall fast 60) move to 60/120s (same concept) start running the 2 mile to where you get below the needed score to pass. Do push-ups and sit-ups morning and before bed. You will have 2 minutes to do these two during your apft (pt test) pull ups help and knee ups. Do V ups, mountain climbers and be prepared to “half right face, front leaning test position. Move!” You May stay in this position for extended periods of time. Doing planks will help as well. If you have a ruck sack and some boots or heavy duty work shoes start rucking 8-12 miles. I recommend starting at 4 and moving your way up. But with the ruck sack old it with 40-60lbs of stuff. Eat 3 times a day morning noon and night and make sure they are healthy meals and no soda or energy drinks. Gatorade/Powerade and water. If you smoke or dip stop now. First hand experience I went in at 30 years old 200lbs 5’8. I dropped damn near 35 lbs. best shape I’ve been in for 10 years or so. You will get exhausted and your body will start to adjust. Keep your head right and positive vibes man. Good luck

Did you get a Guide for New Soldiers and PT guidebook at the MEPS? Has your recruiter reviewed it with you, and provided a training schedule for Future Soldier meetings and training? Have you met other Future Soldiers from your recruiting station that are in the DEP? Has anyone at the recruiting station given you an initial Physical Fitness Assessment test? See where I am going with this? The best thing you can do to be prepared is be proactive with your Army Leaders, who at this point are the Sergeants in your recruiting station.