What is the Average Sit-ups for a 13-Year-old?

The Average Sit-ups for a 13-year-old is anywhere from 8 to 10 reps. However, it varies from person to person because not everyone is the same. For example, some 13-year-old can easily do 10 sit-ups …

Average Sit-ups for a 13-Year-old

The Average Sit-ups for a 13-year-old is anywhere from 8 to 10 reps. However, it varies from person to person because not everyone is the same. For example, some 13-year-old can easily do 10 sit-ups and some may struggle with 5 sit-ups. One of the biggest concerns of youngsters and parents is getting themselves or their kids “Injured”. Therefore, a focus on form and Reps/Sets.

So How much Should a 13-year-old Sit-ups in a day?

It all comes down to the level of core strength you got.

The average Sit-ups a day for a 13-year-old boy is 8-10 reps for 3 sets which are 24-30 reps a day.

The average Sit-ups a day for a 13-year-old girl is 5-8 reps for 3 sets which are 15-24 reps a day.

If you’re are doing more than the average reps in your category then it’s shows you are pro active and fit. However, If you’re struggling to average reps then don’t worry. Practice makes it perfect. The more you practice regularly the better you will get and the more core strength you will it.

Average Sit-ups for a 13-year-old Boy Chart

CategoryAverage Reps

Average Sit-ups for a 13-year-old Girl Chart

CategoryAverage Reps

Sit-ups is a bodyweight exercise for the abdominal which require lifting the torso while lying on the back. It’s best to know which muscle is being targeted, which are:

  • Rectus Abdominis
  • Internal and External Obliques
  • Iliopsoas
  • Rectus Femoris

(Check the targeted muscles in more detail)

Benefits of Sit Ups

Core Strength

Most of the exercises require core strength. By doing sit ups you will be strengthening and toning your core and this will lead to less back and core injury in future. If you want a good strong core then sit ups are the exercise that will help you achieve that.

Better balance and stability

Performing sit ups will help increase your balance and stability. With sit ups, your pelvis, lower back and hip muscles work together with abdominal muscles to increase your balance. This is can be very beneficial as you’re less likely to get injured in the future and will have a better balance.

Improved muscle mass

According to a 2016 study, shows that sits help increase the muscle mass in abdominal and hips muscles. If you’re planning to build muscle mass on your abs and lower back then adding sit ups to your workout would be beneficial.

Increased flexibility

Sit ups help with flexibility as it works on hips and back muscle. This increases mobility and relieves tightness and tension. Furthermore, this leas to reduce stress, increase concentration and boost energy levels.

Improved posture

Sit ups help improve the posture as your core gets stronger your hips, spine and shoulders are easily aligned and that helps with posture.

Read more benefits in more detail

How to do more reps for sit ups?

The form is very important, you need to ensure you performing sit ups correctly. You can check below how to do sit ups with the correct form. Some tips are to avoid pulling your neck or crunching too high.

Create workout plan

In order to do more reps for sit ups, you need to track how many sit ups can do and add them to your workout plan or create one. It’s best to do sits ups every other day so take one day’s break for recovery (such as Monday, Wednesday, and Friday).


  1. Warm up with 5 minutes slow jog.
  2. Exercise (lunges)
  3. Exercise (Pull ups)
  4. Exercise (Sit ups) – Choose your Target (20 reps) and perform the sit ups for 3 sets with 30 seconds break between each sets.
  5. Exercise (Deadlifts)
  6. End your workout with slow prone back extension to release tension from the core.

Adding Resistance

Adding resistance will make your sit ups harder but more effective. Best way to do it is by using an incline sit-up bench. This will add intensity to sit ups and help gain core strength a lot quicker.

Adding Variation

In order to perform more sit ups reps then you make sure your overall core strength is stronger and increasing endurance. The best way to do this by performing different abdominal exercises as it will help build good core strength and stability.

Some of the exercises you can perform are:

  • Captain’s chair
  • V-sit
  • Plank hold
  • Crunches
  • Leg raises

Get Enough Rest and Recovery

After performing a number of abdominal exercises you need to ensure that you let one day for your muscle to recover. This is because your ab muscles will be fatigued, in order for it to get stronger and increase in endurance, so make sure to rest.

How to do a sit up with the correct form?

STEP 1 – Lie on your back with a slight bend to your knees. Arms bent to the elbows and hands touching your head by the ears.

STEP 2 –  Lie on the floor facing the ceiling with a slight bend in your knees and arms bent at the elbows and hands lightly touching your head by the ears.
Engage your core and lift your upper body so your right elbow touches your left knee.

STEP 3 – Return to the start position then lift your upper body so your left elbow touches your right knee. This is the starting position.

STEP 4 – Return to the start position.

Sit ups vs Crunches

Sit ups and crunches are both abdominal exercises. If you want to increase your core strength then it’s recommended to add both of the exercises to your workout. The main difference is the range of motion.

With sit ups, there is more range of motion as you have to move all the up to your knees. Compared to Crunches its less range of motion. There is more muscle activated with sit ups compared to crunches.