---
title: "Core Ball Beachbody 4 Weeks for Everybody — $40K/yr Amazon US Niche (2026) - Flapen"
canonical_url: "https://flapen.com/research/us/sports-outdoors/core-ball-beachbody-4-weeks-for-everybody"
last_updated: "2026-07-21T17:18:01.847Z"
locale: en
meta:
description: "Niche score 41/100 · $40K/yr market · 27K searches/yr · $13.97 avg price. Doesn't clear our bar today. Data updated Jul 2026."
"og:description": "Niche score 41/100 · $40K/yr market · 27K searches/yr · $13.97 avg price. Doesn't clear our bar today. Data updated Jul 2026."
"og:title": "Core Ball Beachbody 4 Weeks for Everybody — $40K/yr Amazon US Niche (2026) - Flapen"
---
# **core ball beachbody 4 weeks for everybody**
**Skip it**
A small market ($40K/yr) — this niche doesn't clear our bar today.
Market size 10Growth 19Conversion 89Competition 38Returns 60Price range 71Avg price 66Brand share 36Review moat 23Quality gap 47
**Conversion**
**Great****10.6%**
search→purchase rate — share of searches ending in a sale
**Price range**
**Good****$5.54–$38.11**
cheapest to priciest tracked listing — scored on the share inside $15–$100
**Avg price**
**Good****$13.97**
avg listing price — sweet spot $15–$100
**Returns**
**Good****2.6%**
return rate — above 6% kills the launch gate
**Quality gap**
**Okay****4.5★**
avg incumbent rating — lower means beatable quality
**Competition**
**Okay****62%**
top-5 click share — leaders hold, buyers still browse
**Brand share**
**Okay****83%**
top-5 brand share — brands hold most of the demand
**Review moat**
**Bad****7,169.28**
avg incumbent reviews — the moat a new listing must climb
**Growth**
**Bad****-12.3%**
90-day search growth — must beat 0% to launch
**Market size**
**Bad****$40K**
$40K/yr · 27K searches
According to Flapen's Amazon United States niche tracking, core ball beachbody 4 weeks for everybody is a $40K/yr Amazon United States market (27K searches/yr). The top 5 brands hold 83% of demand. Demand peaks in Jan. Verdict: Skip it — 41/100.
Data updated Jul 10, 2026 · scored weekly · [~~How we score niches ~~](https://flapen.com/research/methodology)
## **core ball beachbody 4 weeks for everybody market data**
- **Units sold / yr**
- **3K–3K**
- avg 100–250/product
- **Revenue / yr**
- **$35K–$42K**
- units × avg price
- **Launch success**
- **—**
- 1 of 1 new (360d)
- **Conversion rate**
- **10.6%**
- **Avg BSR**
- **#21**
- **Page quality**
- **0%**
- **Prime**
- **100%**
- **Sponsored**
- **94%**
- **Out of stock**
- **0.0%**
- **Avg brand age**
- **62 months**
- **Avg seller age**
- **181 days**
## **Competition & brand share**
The top 5 products take 62% of clicks — established leaders, but buyers still shop beyond them.
**Brands**
**11 **▲rising
**Sellers**
**15**
**Top-5 brand share**
**83%**
Top 20: 100%
**Top-5 click share**
**62%**
Top 20: 100%
**Open market**
**13%**
- Trideer30% - ProBody Pilates18% - KEEP14% - BODi13% - kisnbld8% - Core Balance4% - Open — no brand owns it (5 brands, 13%)
## **Demand & seasonality**
Weekly Amazon search volume, last 104 weeks — -12.3% search growth over the last 90 days.
1K600Spike '24Spike '25Prime Day '25Black Friday '25Holiday '25Spike '26 seasonSepDecMarJunAugNovMarMay
Peak months: Jan · busiest ÷ quietest = 2.0×
[**Open Trend **](https://flapen.com/research/us/sports-outdoors/core-ball-beachbody-4-weeks-for-everybody/trend)
## **Top core ball beachbody 4 weeks for everybody search terms**
- **core ball**20K/yr-19.4%7.8% conv. - **core balls for exercise**5K/yr+21.1%7.5% conv. - **beachbody core ball**857/yr-13.0%19.9% conv. - **core ball beachbody 4 weeks for everybody**689/yr-12.3%0.0% conv. [**All search terms **](https://flapen.com/research/us/sports-outdoors/core-ball-beachbody-4-weeks-for-everybody/search-terms)
## **Top core ball beachbody 4 weeks for everybody products on Amazon**
Each bubble is one product — market share against review moat; bubble size tracks estimated sales, color grades how beatable the incumbent looks.
0%5%$2K10%$4K15%$6K20%$8K1001K10K100K Reviews — right = deep review moatMarket share (90d) ≈ est. sales
Beatable (≤4.3★) Contested Strong incumbent (>4.7★)
All 18 tracked products in this niche — three views at once, no toggling.
### **Top sellers**
by 90-day click share
[1**Trideer Exercise Ball for Yoga Pilates & Fitness Stability Ball Equipment for Home Gym & Office Chair Core & Balance Training Accessories Physical Therapy Equipment Quick Pump Included 5 Sizes**Trideer**$17.56**4.6★44,980 rev](https://www.amazon.com/dp/B07DK9QZV9) [2**KEEP Pilates Ball Small- Balance Yoga Balls for Working Out Fitness Ball for Core Strength and Physical Therapy 25cm Pale Green**KEEP**$7.35**4.4★533 rev](https://www.amazon.com/dp/B0BFX4FP6K) [3**BODi Core Ball for Core Strengthening 8 Small Exercise Ball Lightweight Durable Inflatable Home Gym Workout Equipment for Yoga Pilates Fitness Inflation Straw and Plug Included Silver**BODi**$9.23**4.4★377 rev](https://www.amazon.com/dp/B0CKJ7H8ZG) [4**ProBody Pilates Exercise Ball - Multiple Sizes Gym Grade Balance Ball for Fitness Workout Pregnancy & Physical Therapy Stability Yoga Ball Chair (Blue 65cm)**ProBody Pilates**$18.63**4.5★12,390 rev](https://www.amazon.com/dp/B010TIO30U) [5**Trideer 9-Inch Pilates Ball Small Exercise Ball for Yoga Core Training Physical Therapy Balance Stability and Stretching Pilates Equipment with Inflation Straw**Trideer**$9.03**4.5★12,033 rev](https://www.amazon.com/dp/B077QD9TFF)
**~~View all top sellers →~~**
### **Newest**
by launch date
[**MANTRA SPORTS Exercise Ball Yoga Ball for Pilates & Fitness - Birthing for Pregnancy Stability Core Balance Therapy for Physical Rehab Workout for Home Gym & Office Chair Fast Pump Included**MANTRA SPORTS**$17.39**2,399 rev6mo ago](https://www.amazon.com/dp/B0G8QVBHSJ) [**Amazon Basics 9-Inch Mini Anti-Burst Exercise Ball for Yoga Pilates Core Training Aqua**Amazon Basics**$8.43**471 rev1y ago](https://www.amazon.com/dp/B0DN5JJ1RC) [**jjshund Pilates Ball 9 8 Inch Purple Small Exercise Mini Soft Workout Yoga Ball with Exercise Guide for Home Gym Yoga Pilates Core Training Workout Balance Stability**jjshund**$5.54**839 rev1y ago](https://www.amazon.com/dp/B0D6QJ9H41) [**kisnbld Small Exercise Ball 9 Inch Mini Pilates Ball Anti Burst and Slip Resistant Mini Yoga Ball for Stability Fitness Physical Therapy Stretching & Core Strength Workout at Home Gym & Office**kisnbld**$8.17**2,533 rev2y ago](https://www.amazon.com/dp/B0D16Y8CZ5) [**BODi Core Ball for Core Strengthening 8 Small Exercise Ball Lightweight Durable Inflatable Home Gym Workout Equipment for Yoga Pilates Fitness Inflation Straw and Plug Included Silver**BODi**$9.23**377 rev2y ago](https://www.amazon.com/dp/B0CKJ7H8ZG)
**~~View all new products →~~**
### **Trending**
90-day click momentum
[**MANTRA SPORTS Exercise Ball Yoga Ball for Pilates & Fitness - Birthing for Pregnancy Stability Core Balance Therapy for Physical Rehab Workout for Home Gym & Office Chair Fast Pump Included**MANTRA SPORTS**$17.39**4.7★**▲ 157%**](https://www.amazon.com/dp/B0G8QVBHSJ) [**ProBody Pilates Yoga Ball - Fresh Colors Exercise Ball for Stability Pregnancy Workout Physical Therapy & Birthing Balance Ball Chair (Sky 65 cm)**ProBody Pilates**$19.99**4.5★**▲ 107%**](https://www.amazon.com/dp/B01DVHNRVM) [**Core Balance Exercise Ball for Workouts Anti-Burst and Slip Resistant Swiss Yoga Ball for Pregnancy Stability Fitness and Physical Therapy 4 Sizes with Pump (22 / 55cm Teal)**Core Balance**$16.94**4.6★**▲ 88%**](https://www.amazon.com/dp/B07R61Z2PG) [**APEXUP Yoga Ball 660 lbs Anti-Burst Exercise Ball with Pump 5 Sizes (L (23~26) 65cm Black)**APEXUP**$16.90**4.6★**▲ 84%**](https://www.amazon.com/dp/B0CGLQ8XNN) [**ProBody Pilates Exercise Ball - Multiple Sizes Gym Grade Balance Ball for Fitness Workout Pregnancy & Physical Therapy Stability Yoga Ball Chair (Blue 65cm)**ProBody Pilates**$18.63**4.5★**▲ 72%**](https://www.amazon.com/dp/B010TIO30U)
**~~View all trending →~~**
## **What buyers say about core ball beachbody 4 weeks for everybody**
What buyers praise and complain about, mined from review topics.
### **What buyers love **
**Quality-Overall**15%
*“Decent Quality”*
**Inflation/Deflation**11%
*“Nice inflatable device”*
**Advertised Vs Actual Product**11%
*“As advertised”*
**Exercise/Sports Suitability**9%
*“Good Exercise Ball”*
**Value For Money**9%
*“Good for the price”*
**Size-Overall**7%
*“Good size”*
**Ease Of Use**5%
*“Easy to use”*
**Durability**4%
*“It has held up”*
**Efficiency**3%
*“should work for my needs”*
**Stretchability/Expandability/Elasticity**2%
*“It is comfortable for stretching”*
### **What buyers complain about **
**Inflation/Deflation**20%
*“Keeps deflating”*
**Size-Overall**11%
*“SIZING RUNS SMALL”*
**Durability**8%
*“did not last”*
**Quality-Overall**8%
*“Bad quality”*
**Leak-Proof**4%
*“Leaks air”*
**Ease Of Use**3%
*“Not as easy as it looks”*
**Adhesion/Stickiness**3%
*“Sticky ball”*
**Material Quality**3%
*“Questionable material”*
**Functionality-Overall**2%
*“doesn't work very well”*
**Strength**2%
*“I wish it was a little more sturdy”*
### **Top return reasons **
**Size-Overall**60%
**Inflation/Deflation**10%
**Value For Money**5%
**Advertised Vs Actual Product**4%
**Functionality-Overall**3%
**Material Quality**2%
**Leak-Proof**2%
**Color**2%
**Quality-Overall**2%
**Defective Material/Parts**1%
## **Common questions**
- **Is core ball beachbody 4 weeks for everybody profitable to sell on Amazon United States?**
- The niche generates $40K/yr across 18 tracked products. 1 of 1 products launched in the last 360 days are still selling. 90-day search growth is -12.3%. Flapen's verdict: Skip it (41/100).
- **How competitive is the core ball beachbody 4 weeks for everybody niche?**
- 11 brands and 15 sellers compete. The top 5 products take 62% of clicks and top 5 brands hold 83% of demand.
- **What do buyers complain about in core ball beachbody 4 weeks for everybody?**
- Top complaints mined from reviews: Inflation/Deflation, Size-Overall, Durability. The return rate is 2.6%.
- **When does demand for core ball beachbody 4 weeks for everybody peak?**
- Demand peaks in Jan; the busiest month runs 2.0× the quietest.
- **What does it cost to enter the core ball beachbody 4 weeks for everybody niche?**
- Listings span $5.54–$38.11; the average listing price is $13.97 (sweet spot $15–$100). The average incumbent carries 7,169 reviews — the moat a new listing must climb.
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