Drealmcc0y said:
doing 45 minutes of weights then cardio every day is too much?
Every day? Jesus dude. Your body needs time to recover.
Dont heavy weight lifters do like 4-5 hours of working out every day?
Broken up into several segments with tons of rest in between.
For example, MMA fighters might do two-a-day workouts, where they weightlift in the morning, rest up, and then spar/work on technique later in the day. They also have very specific goals in mind and there is a reason they are the top of athletes in the world.
Well I want to have great endurance in cardio and to look like a beast?
You can achieve that by not working out every day and
by not doing cardio and weightlifting consecutively.
Weight lifting is basically the act of breaking down your muscles and rebuilding them to become stronger through the act of hypertrophy. If you work out too much and don't let your body heal (ie the act of regrowing its cells that you worked out), then eventually you might experience atrophy, which is the act of your cell muscles being weakened and diminishing.
Your rest day -- usually the day after a workout -- is as important if not more so than what you do while working out. It's on those days you need proper nutrition, sleep, and rest (because your body heals best when it's fully rested and has the right amount of nutrients).
I'll let the more knowledgeable correct me if I am wrong. I hope this explains some things for you.