Increasing your strength in real life is as easy as repeatedly raising and lowering heavy objects, but in Grand Theft Auto Online, there's slightly more to it. In between all your snowball fights, you should work on upgrading your strength stat so you can climb ladders more quickly and take more damage in combat without dying. Just don't skip leg day. With GTA 6still several years away, you have plenty of time to beef up in GTA Online. Here's how to do it.