literally just did 3 sets of curls and now I'm just done. I'm burnt, fried, etc. Very tired. Is this normal for someone who hasn't lifted consistently in a while (years)? I can do cardio just fine but weights wreck me. My bloodwork comes back fine, btw. Can I do some cardio to round out my weightlifting workouts until I can actually get a good ~10 sets in? A paltry 3 sets of curls hardly counts as a workout in my book but it's my limit I feel like I'll pass out if I do anymore.