The inner thighs can be overlooked on "leg day" but this challenge will focus on only these forgotten about muscles. You will need a slick floor and either a plate, towel, or socks to complete.

What isn't this challenge? Legs, shoulders, cardio. The best of all the worlds collide in this 20 minute crusher! You need a loop band and a heavy set up weights.

Throwback: This cardio & arm challenge weaves the world of strength and sweat. You start off each series with different style push-ups, as each minute passes you add a cardio move with the strength move, slowing losing the strength move and just leaving cardio. No Equipment needed.

Enjoy this all out cardio challenge with no equipment needed. Trummer hopes you enjoy the weave rounds, he did!

This tricep and cardio challenge will leave your arms shaking and heart pumping. You will need light and medium weights. You can use table or chair in place of the plyo box.

Runner? This mobility challenge is for you. Anna will walk you through 20 minutes of mobility and recovery work specifically targeted for the runner. Grab a towel or long band to help with the stretch.

This recovery challenge is focused on shoulder mobility. This is a great compliment to a heavy upper body workout and important for your overall fitness. You need a lacrosse ball, foam roller, towel/long band and chair.

Anna will walk you through upper body mobility and recovery. Focus will be on your shoulders and upper back.

Anna will walk you through lower body mobility focusing on your hips, glutes and hamstrings. Gimme more.

Get ready to burn out your legs with this challenge. All it takes is 20 minutes and a set of weights. If you want to strengthen and tone your legs, this workout is for you.

Ashley will use light weights to guide you through an intense yoga flow. The use of weights will tone and tighten your muscles and the fast flow will keep your heart rate up.

In this challenge Ashley will break down the basics of yoga. She will walk through the common poses and break down correct form and alignment. Even for the seasoned yogi, this is a challenge you don't want to miss.

This power flow challenge will target your obliques to not only stretch them but to work them! Get ready for a challenging power flow to leave you feeling lengthened and strengthened.

This restorative challenge will focus on releasing tension in the shoulders, neck, and arms. It is a great challenge to pair with a 20 min strength upper body burnout.

A chest burnout without any push ups. Throw in heavy weights to help build strength and muscles.

This is the perfect 20 minute challenge to compliment all the other classes and challenges within The System. Ashley will walk you through a flow that will leave you feeling loose and refreshed.

Just because your feet don't leave the ground doesn't mean your heart rate won't rise. This is a great alternative to high impact cardio that will still leave you breathless.

Kim will crush 2 of our favorite body parts, obliques and triceps! She will use heavy and light weights so you can not only build but tone and sculpt.

Gretchen will walk you through an upper body crusher. It is 20 minutes of non stop effort. Make sure you have medium to heavy weights.

Dr. Vogal will guide you through exercises to help relieve neck pain. You will need a lacrosse ball and a wall to complete this challenge.

Dr. Vogal will walk you through exercises to help relieve and stretch your low back. You will need a long band (or towel) and a plyo box (or chair/bench).

This 20 minute challenge will get your heart rate up and light your arms on fire with the long band. You can use light weights instead. The perfect all around challenge if you are short on time.