You will need any anti air vehicle with preferably a radar such as the Santal

Look for a match in your own country since anti air is even more useless\ on high ping

At the start of the game look for the red arrow
(circled in blue) after you know where they spawn look for a cozy spot the Santal has decent mobility and it can float so the ocean is an option you want to get high and have no major obstacles

Once you find a spot like this you can turn on your radar and lock on

Now you can do whatever you want preferably you want to do something you can leave in a reasonable time without dropping your weights or messing something up so pushups, curls, overhead press maybe some squats etc most of the time you have enough time in between to do a couple sets and get some type of a drink