---
title: "4 Lb Medicine Ball — $77K/yr Amazon US Niche (2026) - Flapen"
canonical_url: "https://flapen.com/research/us/sports-outdoors/4-lb-medicine-ball"
last_updated: "2026-07-21T17:18:12.167Z"
locale: en
meta:
description: "Niche score 45/100 · $77K/yr market · 35K searches/yr · $25.95 avg price. Doesn't clear our bar today. Data updated Jul 2026."
"og:description": "Niche score 45/100 · $77K/yr market · 35K searches/yr · $25.95 avg price. Doesn't clear our bar today. Data updated Jul 2026."
"og:title": "4 Lb Medicine Ball — $77K/yr Amazon US Niche (2026) - Flapen"
---
# **4 lb medicine ball**
**Skip it**
A small market ($77K/yr) — this niche doesn't clear our bar today.
Market size 19Growth 47Conversion 81Competition 27Returns 70Price range 84Avg price 95Brand share 29Review moat 32Quality gap 24
**Avg price**
**Incredible****$25.95**
avg listing price — sweet spot $15–$100
**Price range**
**Great****$10.89–$41.76**
cheapest to priciest tracked listing — scored on the share inside $15–$100
**Conversion**
**Great****8.5%**
search→purchase rate — share of searches ending in a sale
**Returns**
**Good****2.2%**
return rate — above 6% kills the launch gate
**Growth**
**Okay****+17.7%**
90-day search growth — must beat 0% to launch
**Review moat**
**Okay****3,251.33**
avg incumbent reviews — the moat a new listing must climb
**Brand share**
**Okay****88%**
top-5 brand share — brands hold most of the demand
**Competition**
**Okay****69%**
top-5 click share — leaders hold, buyers still browse
**Quality gap**
**Bad****4.6★**
avg incumbent rating — lower means beatable quality
**Market size**
**Bad****$77K**
$77K/yr · 35K searches
According to Flapen's Amazon United States niche tracking, 4 lb medicine ball is a $77K/yr Amazon United States market (35K searches/yr). The top 5 brands hold 88% of demand. Verdict: Skip it — 45/100.
Data updated Jul 17, 2026 · scored weekly · [~~How we score niches ~~](https://flapen.com/research/methodology)
## **4 lb medicine ball market data**
- **Units sold / yr**
- **3K–4K**
- avg 250–500/product
- **Revenue / yr**
- **$78K–$104K**
- units × avg price
- **Launch success**
- **—**
- 0 of 0 new (360d)
- **Conversion rate**
- **8.5%**
- **Avg BSR**
- **#34**
- **Page quality**
- **0%**
- **Prime**
- **100%**
- **Sponsored**
- **86%**
- **Out of stock**
- **3.0%**
- **Avg brand age**
- **76 months**
- **Avg seller age**
- **203 days**
## **Competition & brand share**
The top 5 products take 69% of clicks — established leaders, but buyers still shop beyond them.
**Brands**
**12 **▲rising
**Sellers**
**27**
**Top-5 brand share**
**88%**
Top 20: 100%
**Top-5 click share**
**69%**
Top 20: 99%
**Open market**
**9%**
- Champion Sports23% - Amazon Basics22% - ProsourceFit20% - RitFit16% - Sunny Health & Fitness6% - Logest4% - Open — no brand owns it (6 brands, 9%)
## **Demand & seasonality**
Weekly Amazon search volume, last 102 weeks — +17.7% search growth over the last 90 days.
900700Spike '24Holiday '24Spike '25Holiday '25Spike '26 seasonDecMarJunAugNovMarMay
No pronounced peak months · busiest ÷ quietest = 1.6×
[**Open Trend **](https://flapen.com/research/us/sports-outdoors/4-lb-medicine-ball/trend)
## **Top 4 lb medicine ball search terms**
- **4lb medicine ball**12K/yr+33.0%7.9% conv. - **4 lb medicine ball**7K/yr+59.7%9.5% conv. - **medicine ball 4 lbs**5K/yr+22.4%7.5% conv. - **4 pound medicine ball**5K/yr+30.7%9.7% conv. - **4 lbs medicine ball**6K/yr-37.0%7.6% conv. [**All search terms **](https://flapen.com/research/us/sports-outdoors/4-lb-medicine-ball/search-terms)
## **Top 4 lb medicine ball 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%10%$8K20%$15K30%$23K40%$31K101001K10K100K Reviews — right = deep review moatMarket share (90d) ≈ est. sales
Beatable (≤4.3★) Contested Strong incumbent (>4.7★)
All 21 tracked products in this niche — three views at once, no toggling.
### **Top sellers**
by 90-day click share
[1**Amazon Basics Weighted Medicine Ball for Core Strength Strength Training Full-Body Workouts and Balance Exercises 4 Pounds Green/Black**Amazon Basics**$20.17**4.8★13,637 rev](https://www.amazon.com/dp/B01CKHE45W) [2**ProsourceFit Weighted Medicine Ball for Full Body Workouts**ProsourceFit**$25.25**4.8★805 rev](https://www.amazon.com/dp/B00PZ56CVQ) [3**RitFit Weighted Medicine Ball - Non-Slip Rubber Shell & Dual Texture Grip - Workout Exercise Ball for Core Strength Balance Training Coordination Fitness - Multiple Weights & Colors**RitFit**$31.17**4.5★413 rev](https://www.amazon.com/dp/B08CV9DJ2W) [4**Champion Sports PRX4 Rhino Promax Elite Slam Balls 4 lb Soft Shell with Non-Slip Grip Medicine Wall Exercise Ball for Weightlifting Plyometrics Cross Training & Home Gym Fitness**Champion Sports**$41.76**4.3★1,151 rev](https://www.amazon.com/dp/B07YBX3ZH1) [5**Sunny Health & Fitness 4LB Medicine Ball Textured Rubber Core Strength & Balance Training Bouncing Weight for Home Workouts SF-EB03-4**Sunny Health & Fitness**$31.47**4.7★13 rev](https://www.amazon.com/dp/B0DBJBF6RK)
**~~View all top sellers →~~**
### **Newest**
by launch date
[**Sunny Health & Fitness 4LB Medicine Ball Textured Rubber Core Strength & Balance Training Bouncing Weight for Home Workouts SF-EB03-4**Sunny Health & Fitness**$31.47**13 rev1y ago](https://www.amazon.com/dp/B0DBJBF6RK) [**Logest Weighted Toning Exercise Balls Pair - Round Shape Medicine Ball - 1LB 2LB 3LB 4LB 5LB 6LB Available - Toning Muscle for Men & Women - Color-Coded Difficulty Levels (4LB - Pair)**Logest**$25.85**165 rev2y ago](https://www.amazon.com/dp/B0D5P3ZG1J) [**Logest Weighted Toning Exercise Balls Pair - Round Shape Medicine Ball - 1LB 2LB 3LB 4LB 5LB 6LB Available - Toning Muscle for Men & Women - Color-Coded Difficulty Levels (1LB - Pair)**Logest**$17.44**165 rev2y ago](https://www.amazon.com/dp/B0D5NX5LWC) [**Retrospec Core Weighted Medicine Ball 4 6 8 10 12 14 16 20 25 30 lbs Soft Touch Vegan Leather with Sturdy Grip for Strength Training Recovery Balance Exercises and Other Full-Body Workouts**Retrospec**$29.76**497 rev3y ago](https://www.amazon.com/dp/B0C7DQ2DJL) [**JFIT Soft Wall Medicine Ball 4 LB Blue/Black**JFIT**$36.02**2,204 rev4y ago](https://www.amazon.com/dp/B09NL5SQX6)
**~~View all new products →~~**
### **Trending**
90-day click momentum
[**Champion Sports Rhino Gel Filled Medicine Ball (Blue 4 lbs)**Champion Sports**$17.18**4.6★**▲ 96%**](https://www.amazon.com/dp/B0029VSDG6) [**Sunny Health & Fitness 4LB Medicine Ball Textured Rubber Core Strength & Balance Training Bouncing Weight for Home Workouts SF-EB03-4**Sunny Health & Fitness**$31.47**4.7★**▲ 74%**](https://www.amazon.com/dp/B0DBJBF6RK) [**ProBody Pilates Exercise Ball - Multiple Sizes Gym Grade Balance Ball for Fitness Workout Pregnancy & Physical Therapy Stability Yoga Ball Chair (Blue 65cm)**ProBody Pilates**$18.60**4.5★**▲ 66%**](https://www.amazon.com/dp/B010TIO30U) [**Logest Weighted Toning Exercise Balls Pair - Round Shape Medicine Ball - 1LB 2LB 3LB 4LB 5LB 6LB Available - Toning Muscle for Men & Women - Color-Coded Difficulty Levels (1LB - Pair)**Logest**$17.44**4.6★**▲ 58%**](https://www.amazon.com/dp/B0D5NX5LWC) [**Rubber Medicine Ball - 4.4 lb. - Red**BSN SPORTS**$31.94**4.6★**▲ 55%**](https://www.amazon.com/dp/B001QTS1GO)
**~~View all trending →~~**
## **What buyers say about 4 lb medicine ball**
What buyers praise and complain about, mined from review topics.
### **What buyers love **
**Quality-Overall**26%
*“Amazing quality”*
**Value For Money**12%
*“Worth the price”*
**Size-Overall**10%
*“Good size”*
**Durability**9%
*“Durable”*
**Exercise/Sports Suitability**9%
*“terrific for yoga”*
**Inflation/Deflation**6%
*“Easy to inflate”*
**Ease Of Use**5%
*“Easy to use”*
**Grip**4%
*“Easy to grip and pick up”*
**Efficiency**3%
*“It works”*
**Material Quality**2%
*“I really liked the material”*
### **What buyers complain about **
**Smell**11%
*“Smells like rubber”*
**Quality-Overall**9%
*“Cheap”*
**Inflation/Deflation**9%
*“Deflates too easy”*
**Leak-Proof**8%
*“Leaks air”*
**Size-Overall**7%
*“too big for the hand”*
**Material Quality**7%
*“Impractical surface materials”*
**Adhesion/Stickiness**6%
*“making the ball sticky”*
**Ease Of Use**6%
*“its VERY hard to get the stuff off”*
**Stretchability/Expandability/Elasticity**5%
*“stretch my hips no can stretch my hamstrings too”*
**Balance/Stability**5%
*“out of balance when it hits the floor that it rolls too far out of reach”*
### **Top return reasons **
**Size-Overall**57%
**Weight Heavy**7%
**Advertised Vs Actual Product**6%
**Weight Light**5%
**Hard Feel**3%
**Grip**2%
**Smell**2%
**Inflation/Deflation**2%
**Value For Money**2%
**Functionality-Overall**2%
## **Common questions**
- **Is 4 lb medicine ball profitable to sell on Amazon United States?**
- The niche generates $77K/yr across 21 tracked products. 90-day search growth is +17.7%. Flapen's verdict: Skip it (45/100).
- **How competitive is the 4 lb medicine ball niche?**
- 12 brands and 27 sellers compete. The top 5 products take 69% of clicks and top 5 brands hold 88% of demand.
- **What do buyers complain about in 4 lb medicine ball?**
- Top complaints mined from reviews: Smell, Quality-Overall, Inflation/Deflation. The return rate is 2.2%.
- **When does demand for 4 lb medicine ball peak?**
- Demand is steady year-round — the busiest month runs 1.6× the quietest.
- **What does it cost to enter the 4 lb medicine ball niche?**
- Listings span $10.89–$41.76; the average listing price is $25.95 (sweet spot $15–$100). The average incumbent carries 3,251 reviews — the moat a new listing must climb.
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