Do You Know What Your 13 Major Muscle Groups Are?



You may be aware that there are more than 600 muscle in the human body but what are considered the major muscle groups from that list?

About 35-42 percent of your body weight is made up of muscle tissue and muscle is either cardiac, smooth or skeletal.

Muscle fibers are classified as either slow twitch fibers or fast twitch fibers based on their contraction times.

Getting back to our question of the actual number of major muscles groups in the body – well, that number is thirteen and they are:

  • Abdominals
  • Biceps
  • Deltoid
  • Erector Spinae
  • Gastrocnemius & Soleus
  • Gluteus Maximus
  • Hamstrings
  • Latissiumus Dorsi & Rhomboids
  • Obliques
  • Pectoralis
  • Quadriceps
  • Trapezius
  • Triceps

One of the most important muscles in this group of thirteen is the abdominal muscle known as the rectus abdominis. It is considered part of the core that includes 28 additional muscles. Hidden beneath your “abs” is your tranverse abdominis muscle and on the sides are your (internal/external) oblique muscles. A strong core is important for good posture and even more critical when jumping, running or lifting weight overhead. The development of a strong core is vital for everything from ADL’s to sport-specific movements to helping you maintain functionality as you age. To increase endurance and strength in this area continue to use full-body movements as well as over-head lifts. In addition, add in various progressions of prone and side plank exercises.


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