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Trideer Exercise Balls Physical Therapy, 9 Inch Pilates Ball Between Knees for Physical Therapy, Mini Exercise Ball – Yoga Ball, Small Workout Balls for Core Strength and Back Support with Guide

Trideer Exercise Balls Physical Therapy, 9 Inch Pilates Ball Between Knees for Physical Therapy, Mini Exercise Ball – Yoga Ball, Small Workout Balls for Core Strength and Back Support with Guide

Trideer Exercise Balls Physical Therapy, 9 Inch Pilates Ball Between Knees for Physical Therapy, Mini Exercise Ball – Yoga Ball, Small Workout Balls for Core Strength and Back Support with Guide
Price: $16.99 - $9.99
(as of May 27, 2026 18:38:18 UTC – Details)



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Customers say

Customers find the exercise ball effective for physical therapy, particularly for knee strengthening and home workouts, and appreciate its perfect size for stretching leg muscles. The ball is easy to work with and inflate, and customers consider it a quality product that functions well. While some customers find it strong, others report it being flimsy for PT exercises. The inflation aspect receives mixed feedback, with some finding it easy to inflate while others report it deflates easily.

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133 customers mention quality, 117 positive, 16 negative

Customers find the exercise ball to be of good quality, describing it as a great Pilates ball.

Good quality, easy to inflate. I like the 9 inch size for exercises with ball between legs. Also works good for cores exercises. Great price too.Read more

It's a great product and is well made.Read more

Great quality and I love the color. Feels great. Easy to inflate. Perfect for my needs. Thank you!Read more

I needed this ball for rehab on my hip. It was great!! Well made and my husband easily inflated it for me.Read more

90 customers mention exercise suitability, 88 positive, 2 negative

Customers find the exercise ball suitable for physical therapy, particularly for knee strengthening and core workouts, with one customer noting its effectiveness for shoulder and hip rehabilitation.

The ball is sturdy, but has a little give. It works well for the exercises the physical therapist gave me….Read more

I am doing PT and use this ball for my exercises at home. Perfect for core exercises.Read more

Great for exercisingRead more

Perfect for my exercises. Easy to inflate.Read more

62 customers mention physical use, 61 positive, 1 negative

Customers find the exercise ball effective for physical therapy, particularly for sciatica treatment, and appreciate that it can be used for more than just Pilates.

Product works well for me. Easy to inflate and does not leak. Great for physical therapy.Read more

Great for physical therapy exercisesRead more

Very usefulRead more

…Feels great. Easy to inflate. Perfect for my needs. Thank you!Read more

54 customers mention functionality, 53 positive, 1 negative

Customers find that the exercise ball works well.

It's exactly what I ordered and works great. Was on time too and easy to blow up.Read more

Works well for being able to do PT exercises at home after hip replacement surgery.Read more

Got this for back exercises. Works fine.Read more

…BUT I am really enjoying using it. It does the job and much easier to keep in room.Read more

51 customers mention size, 44 positive, 7 negative

Customers like the ball's size, describing it as perfect for exercises and stretching leg muscles, with one customer noting it's ideal for knee compressions.

…I ordered one for myself. It is not hard. Perfect for my therapy. Perfect size and retains air.Read more

Right size once inflated with enough flex to squeeze in incriments.Read more

Perfect size for physical therapy.Read more

I like the ball and it’s the correct sizeRead more

39 customers mention ease of use, 34 positive, 5 negative

Customers find the exercise ball easy to use and inflate, with one mentioning that it comes with a pin/plug removal tool.

…It was easy to inflate and stays inflated. It is durable and easy to use. Also comes with exercise instructions.Read more

It’s as advertised. It will hurt your feelings during a workout. Easy to pump up. Hasn’t deflated. The texture keeps it from slipping when sweaty….Read more

Bought it for rehab after arthroscopic knee surgery. Easy to inflate and use.Read more

Ball easy to inflate comes with pieces to keep in place. Would is great from r PT exercises!Read more

145 customers mention inflation, 85 positive, 60 negative

Customers have mixed experiences with inflating the exercise ball, with some finding it easy to inflate while others report it being hard to fill and losing air over time.

Good quality, easy to inflate. I like the 9 inch size for exercises with ball between legs. Also works good for cores exercises. Great price too.Read more

Returned after one week. Difficult to inflate with the small straw that is in closed. It did not hold air.Read more

The ball was easy to blow up and retains the shape while exercising. Fabulous seller too!!Read more

Great value but hard to inflateRead more

41 customers mention durability, 28 positive, 13 negative

Customers have mixed opinions about the exercise ball's durability, with some finding it strong while others report it being flimsy for physical therapy exercises and causing damage to coffee tables.

…It was easy to inflate and stays inflated. It is durable and easy to use. Also comes with exercise instructions.Read more

…It's sturdy, looks nice, and wipes clean if it gets dusty. Overall, I really like this. It's my second one, my first one got hijacked by my dad….Read more

…It had a hole in it. I thru it away..Read more

…It’s seeming to be very durable and the right size for most rehab exercise exercises….Read more


PT / 4 Square

5 out of 5 stars
PT / 4 Square
Great for my PT needs. Bonus: also a perfect basement 4 square ball for nieces and nephews (see photo)

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Top reviews from the United States

  • 5 out of 5 stars

    Perfect for some new exercises

    Reviewed in the United States on April 25, 2026
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    This yoga exercise ball is perfect. It inflates easily. The color is fabulous. It comes with a cloth demonstration poster so you can easily do the workout to get started. I had to keep it away from the dogs as they thought it was for them.

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  • 5 out of 5 stars

    Well made exercise ball

    Reviewed in the United States on April 4, 2026
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    This item is allowing me to do the exercises at home that I am doing in physical therapy. This is going to help me on my journey to recovery. Easy to inflate with a few breaths of air. Good quality item at a reasonable price.

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  • 5 out of 5 stars

    Good quality, works well

    Reviewed in the United States on February 12, 2026
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    Well, it meets or exceeds expectations. The size is right, the material is good, and it holds air. I'm not sure what it could do to excel, really, but it certainly delivers what it should. It was nice that they include a little tool to pull the plug out of the ball because it's quite tight (that's a good thing) and my fingernails aren't strong enough to pull it out without damage.
    3 people found this helpful

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  • 5 out of 5 stars

    Great tool for PT

    Reviewed in the United States on May 5, 2026
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    Perfect for my needs. Easy to inflate.

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  • 4 out of 5 stars

    It's a 9 inch exercise ball and it doesn't cost very much.

    Reviewed in the United States on October 26, 2025
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    The product seems OK. I've only used it for a few days and it already needs more air. The instructions are ridiculous. I did figure out how to "blow up" the ball. It isn't intuitive that you need to do that. So take the straw, insert it into the opening and blow. The next challenge is getting the plug in place without losing air. Good luck with that. It is a 9 inch exercise ball. Doesn't smell gross. I have been able to use it for my PT exercises.
    7 people found this helpful

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  • 5 out of 5 stars

    Great physical therapy tool

    Reviewed in the United States on March 31, 2026
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    Recently had surgery on my shoulder (labrum) and also repaired the long biceps tendon. This is a great tool to assist in the physical therapy and recovery. While I'm watching tv or sitting around I just throw it up and catch it over & over. Its been great to help speed up recovery and strengthen my biceps & shoulder again

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  • 5 out of 5 stars

    Well-made, affordable exercise ball

    Reviewed in the United States on May 10, 2026
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    Easy to fill with whatever firmness you need it to be. Can also be flattened if you are traveling.

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  • 3 out of 5 stars

    Blew up easily

    Reviewed in the United States on February 15, 2026
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    My husband blew it up easily. I am still in the process of using it.

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Product Summary: Trideer Exercise Balls Physical Therapy, 9 Inch Pilates Ball Between Knees for Physical Therapy, Mini Exercise Ball – Yoga Ball, Small Workout Balls for Core Strength and Back Support with Guide

From Trideer
Boosts Joint & Muscle Rehab: This Pilates ball, as ideal pieces of physical therapy equipment, works wonders in joint and muscle rehabilitation exercises (esp. back rehab!). It speeds up the recovery of a wide variety of body parts including the ankle, knee & hip joints and back & shoulder muscles, by improving posture, balance, and core stability, and in a safer way.
Unlimited Variety of Uses: These swiss balls for exercise are an extremely versatile tool to help strengthen your whole body. They add an extra level of stability in yoga, pilates, barre, fitness training and rehab or recovery programs so as to enhance your practices. Also works great for releasing deep layers of muscles and fascia pre- and post-workout at home, in the gym, or at the physical therapy offices and rehabilitation centers.
Easy to Inflate & Store: The 9 inch mini exercise ball inflates in seconds using the included tube. Make sure you quickly plug it tight using the included plug after inflation to avoid any air leaking. The small size of the pilates ball makes it easy to store at home or take with you to classes, therapy sessions, or when traveling.
Anti-Burst & Anti-Slip: These 9” physioballs are made from long-lasting PVC free of phthalates. The physical therapy ball does not contain heavy metals (Pb, Cd, Hg, etc.) or 10 types of harmful heavy metal salts. The textured anti-slip surface delivers a firm and comfortable grip for your peace of mind when working out.
Avoid placing the Pilates ball on wooden furniture for long periods to prevent damage.



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