Pump up your heart rate and burn off fat and calories with this intense and motivating Tabata routine! This high intensity workout will build up and tone your entire body.

Try this HIIT workout with weights to lose weight fast. Mix Plyometrics/cardio with muscle building exercises and 18 minutes is all you need to build muscle and lose weight. Select a light set of dumbbells between 3-10 lb.

This HIIT workout alternates between one minute of cardio burst exercises and one minute of strength exercises. A challenging workout for days that you are feeling strong. Select a set of weights that are not too heavy. Do this workout twice a week and you'll see a big change in 3-4 weeks. You'll need 3-10 lb. dumbbells. Increase weight and reps as you become stronger.

Do this routine 3 times a week on nonconsecutive days for a total body transformation. Pick a set of weights at which you can barely make the last rep of your final set with perfect form.

Try this full body workout with or without dumbbells at home, the gym, anywhere! Pick a set of weights that make the last two reps of each exercise challenging. You'll be doing 15 moves - 5 for your legs and butt, 4 for your arms, chest, and back, and 3 for your abs and core.

This HIIT workout is short and intense. Burn fat and build muscle using only your bodyweight. Tone and shape in just 15 minutes.