Muscle Groups

When it comes to the different parts of your body and working those different parts out, we start with the three major overarching muscle groups. They are upper body, lower body, and core.

muscle groups apex haus

Upper Body

The muscle groups of the upper body can further be broken down into 4 subcategories: chest, back, shoulders, and arms. Furthering the breakdown, you can then separate arms into biceps and triceps.

Many of the muscle groups in your body come in opposite pairs, the “push and pull” factor if you will. In regards to your upper body, these include back and chest, and biceps and triceps. Your back and biceps are the “pull,” while your chest and triceps are the “push.” Just think of doing a push-up or a pull-up. When you do a push-up, your chest and triceps are activated. Oppositely, when you do a pull-up, your back and biceps are activated. You want to make sure you work each half of the pairs equally, otherwise this can lead to injury.

Lower Body

The lower body is considered the strongest part of your body, because if you think about it, it’s been supporting your entire upper body all your life. Its constantly being worked day in and day out, moving you from Point A to Point B.

Your lower body muscles can be broken down into 4 subcategories: quadriceps (quads for short), hamstrings, calves, and glutes (a.k.a. your butt).

Going back to the push/pull factor, your quads are the push muscles, while your hamstrings are the pull muscles. Remember, you always want to work these out equally to support an overall strong physical build. You are only as strong as your weakest link.


Last, and certainly not least (as a matter of fact, it might be the most important), is your core. A common misconception by many is that your core references only your abs, which is inaccurate. Your core can actually be divided into 3 subcategories:

Your core consists of not only your abdominal muscles (abs for short), which is the front part of your core, but the muscles on the sides and back as well, encompassing the entire center of your body, all the way around. The side muscles are your obliques, and the back muscles are simply that: your lower back/lats.

There you have it, a simple overview of the major muscle groups you should be focused on when starting out on the path to a better you. Now please keep in mind this is not an in-depth review of all the minor muscles or subcategories that make up the major muscle groups.

Each group can be broken down to even smaller, more specific muscles. However, this guide is meant to simply help you understand the major groups as it pertains to starting out with fitness, and what you should be focusing on to get a full body workout.