Watch Strength Training and Cardio Collection

Marissa will be targeting all of the main muscle groups through various multi- joint exercises that help strengthen, sculpt, and slim down your entire body.

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

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 low impact, which means you won't be doing the explosive, plyometric moves typically associated with HIIT workouts. It's quick and efficient, which is perfect for busy days. We recommend a set of light weights between 3-5lb.

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.

This bodyweight workout will help build muscle and tone your entire body. If you want a lose weight quickly, do this workout 3 times a week on nonconsecutive days.

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.

This full body routine will make you stronger and fitter in just a few weeks. No equipment is needed to get your sweat on here. Work on your abs, core, butt, glutes, legs, thighs, and more!

Tone and firm your butt as you lean out your legs and trim your thighs with this no equipment lower body routine.

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.

If you are a beginner and want to tone and strengthen your abs, this workout is for you! It's a really simple and highly effective routine, which can be modified if you're looking for something more intense or are a experienced execiser looking for a short workout. Just increase reps or add weights for more of a challenge. For best results, do this routine 3 times a week. Repeat twice for quicker results.

Grab a pair of 3-10 pound dumbbells and work for the figure you want! Sculpt your entire body as you address those problem areas - the abs, butt, legs, and thighs. The more intense of a workout you do, the more calories you're going to burn over the next 24 hour from the after-burn. If you want a longer sweat session, repeat this 1-2 more times.

These home bodyweight only exercises are perfect for sculpting and trimming both your midsection and lower body. Build a rounder booty, leaner legs, trimmer thighs, and a sculpted waist in no time by doing this workout 3 times a week on nonconsecutive days.

Tone and trim your entire body with this full body routine. The more intense of a workout you do, the more calories you're going to burn over the next 24 hour from the after-burn. If you want a longer sweat session, repeat the routine 1-2 more times.

This is an intense HIIT workout for intermediate to advanced fitness levels! The routine consists of strength circuits and cardio exercises, and is designed to blast calories (301-352) and improve your aerobic fitness. Each circuit will focus on all muscle groups. A set of 3-10 lb. weights is recommended. For best results, use a pair of weights that make the last 2 reps challenging.

Get shredded by burning fat and building muscle with this high intensity workout. You will seriously boost your metabolism. All you need is a set of 3-10 lb. dumbbells and a mat.

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.

This is an intense cardio sculpting workout for all fitness levels! The routine consists of strength circuits and cardio exercises. You'll need a pair of 3-10 lb. weights and plenty of water. For best results, use a pair of weights that make the last 2 reps challenging.

This full body kettlebell workout will help sculpt your entire body in just 20 minutes. Kettlebells are a wonderful fitness tool to add to your fitness regimen. They can burn 40-50% more calories than dumbbells and add muscle without bulking you up as you target problem areas such as the hips, thighs, and waist. So set aside 20 minutes, grab a pair of 8-20 lb kettlebells, and get ready to sweat!