Get ready to look strong and sexy in any tank top with this back and shoulder HIIT workout!

If you’ve been in the workout circuit for a while, you probably know that many trainers have strong opinions on whether cardio or weight lifting is better for weight loss. On one hand, cardio burns a lot of calories by keeping your heart rate elevated. On the other, weight lifting creates muscle mass that elevates your resting metabolic rate. This means you burn more calories while at rest. So, which one is better?