Warm up your weak and/or inactive muscles before you train

Pick 3 exercises to address them and try to get those muscles working. Don’t smash yourself on the warm up, just potentiate those muscles. If you sit on your ass the whole day your glutes are most likely inactive and the lower back will take over a large portion of the work. I´m sure you experienced this at some point: your lower back is completely fatigued after squatting. That’s because your glutes are not firing.