Personal training since 2003 I’ve seen my fair share of gym goers enter the club, grab the heaviest dumbbells in the gym and start hurling them around as if having a mini-seizure. I just want to yell, “WARM-UP!” it’s important; you get the blood flowing, lubricate your joints, and like Pavlov’s theory it becomes a conditioned response to your body so when your done with the warm-up, you’re ready to GET AFTER IT!!!!!!!