---
title: "Leg Extension Machine — $2.9M/yr Amazon US Niche (2026) - Flapen"
canonical_url: "https://flapen.com/research/us/sports-outdoors/leg-extension-machine"
last_updated: "2026-07-21T19:38:21.819Z"
locale: en
meta:
description: "Niche score 46/100 · $2.9M/yr market · 1.1M searches/yr · $492.10 avg price. Doesn't clear our bar today. Data updated Jul 2026."
"og:description": "Niche score 46/100 · $2.9M/yr market · 1.1M searches/yr · $492.10 avg price. Doesn't clear our bar today. Data updated Jul 2026."
"og:title": "Leg Extension Machine — $2.9M/yr Amazon US Niche (2026) - Flapen"
---
# **leg extension machine**
**Skip it**
Prices mostly outside the sweet spot ($152.10–$3095.56) — this niche doesn't clear our bar today.
Market size 96Growth 27Conversion 7Competition 23Returns 98Price range 0Avg price 1Brand share 34Review moat 95Quality gap 52
**Returns**
**Incredible****0.4%**
return rate — above 6% kills the launch gate
**Market size**
**Incredible****$2.9M**
$2.9M/yr · 1.1M searches
**Review moat**
**Incredible****97.8**
avg incumbent reviews — the moat a new listing must climb
**Quality gap**
**Good****4.4★**
avg incumbent rating — lower means beatable quality
**Brand share**
**Okay****84%**
top-5 brand share — brands hold most of the demand
**Growth**
**Okay****+1.5%**
90-day search growth — must beat 0% to launch
**Competition**
**Bad****72%**
top-5 click share — a locked-up shelf
**Conversion**
**Bad****0.5%**
search→purchase rate — share of searches ending in a sale
**Avg price**
**Bad****$492.10**
avg listing price — sweet spot $15–$100
**Price range**
**Bad****$152.10–$3095.56**
cheapest to priciest tracked listing — scored on the share inside $15–$100
According to Flapen's Amazon United States niche tracking, leg extension machine is a $2.9M/yr Amazon United States market (1.1M searches/yr). The top 5 brands hold 84% of demand. Verdict: Skip it — 46/100.
Data updated Jul 17, 2026 · scored weekly · [~~How we score niches ~~](https://flapen.com/research/methodology)
## **leg extension machine market data**
- **Units sold / yr**
- **6K–8K**
- avg 250–500/product
- **Revenue / yr**
- **$3.0M–$3.9M**
- units × avg price
- **Launch success**
- **89%**
- 8 of 9 new (360d)
- **Conversion rate**
- **0.5%**
- **Avg BSR**
- **#73**
- **Page quality**
- **0%**
- **Prime**
- **13%**
- **Sponsored**
- **93%**
- **Out of stock**
- **14.9%**
- **Avg brand age**
- **32 months**
- **Avg seller age**
- **171 days**
## **Competition & brand share**
The top 5 products capture 72% of clicks — a locked-up shelf that new listings rarely crack.
**Brands**
**11 **▼falling
**Sellers**
**19**
**Top-5 brand share**
**84%**
Top 20: 100%
**Top-5 click share**
**72%**
Top 20: 100%
**Open market**
**12%**
- JELENS40% - Mikolo25% - GMWD12% - Goimu5% - Z ZHICHI4% - ANCHEER4% - Open — no brand owns it (5 brands, 12%)
## **Demand & seasonality**
Weekly Amazon search volume, last 104 weeks — +1.5% search growth over the last 90 days.
40K30KSpike '24Holiday '24Spike '25Prime Day '25Black Friday '25Spike '26 seasonSepDecMarJunAugNovMarMay
No pronounced peak months · busiest ÷ quietest = 1.4×
[**Open Trend **](https://flapen.com/research/us/sports-outdoors/leg-extension-machine/trend)
## **Top leg extension machine search terms**
- **leg extension and curl machine**369K/yr+4.5%0.3% conv. - **leg extension machine**158K/yr-1.9%0.3% conv. - **leg machine**97K/yr+0.4%0.1% conv. - **leg curl machine**93K/yr-3.2%0.3% conv. - **leg extension**84K/yr+6.3%0.1% conv. - **leg machines home gym**57K/yr-6.8%0.2% conv. - **leg curl extension machine**45K/yr-3.9%0.4% conv. - **hamstring curl machine**35K/yr+2.1%0.2% conv. - **ritfit leg extension and curl machine**26K/yr+6.0%0.1% conv. - **leg curl**27K/yr-17.1%0.3% conv. [**All search terms **](https://flapen.com/research/us/sports-outdoors/leg-extension-machine/search-terms)
## **Top leg extension machine 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%$290K20%$579K30%$869K40%$1.2M1101001K Reviews — right = deep review moatMarket share (90d) ≈ est. sales
Beatable (≤4.3★) Contested Strong incumbent (>4.7★)
All 15 tracked products in this niche — three views at once, no toggling.
### **Top sellers**
by 90-day click share
[1**JELENS J10 Leg Extension and Curl Machine Adjustable Leg Curl Machine for Home Gym Seated Leg Extension and Lying Curl Machine for Lower Body Workouts (Red Classical)**JELENS**$193.14**4.5★168 rev](https://www.amazon.com/dp/B0FM7SBNQK) [2**Mikolo Leg Extension and Curl Machine Adjustable Leg Curl Machine for Home Gym Seated Leg Extension and Lying Leg Curl Machine Leg Workout Equipment with 1:1 Resistance System Black**Mikolo**$439.33**4.7★54 rev](https://www.amazon.com/dp/B0H15CQK3T) [3**GMWD Leg Extension and Curl Machine Lower Body Special Leg Machine Adjustable Leg Exercise Bench with Plate Loaded Leg Rotary Extension for Thigh Home Gym Weight Machine Red**GMWD**$257.24**4.5★367 rev](https://www.amazon.com/dp/B0C69PZPJS) [4**Mikolo Leg Extension and Curl Machine Adjustable Leg Curl Machine for Home Gym Seated Leg Extension and Lying Leg Curl Machine Leg Workout Equipment with 1:1 Resistance System Red**Mikolo**$442.47**4.7★54 rev](https://www.amazon.com/dp/B0H151LLLR) [5**GOIMU Leg Extension and Curl Machine 4 in 1 Lower Body Workout Machine Adjustable Leg Curl Machine with Plate Loaded Leg Extension Machine with Exercise Bench Home Gym Weight Machine**Goimu**$201.85**3.9★106 rev](https://www.amazon.com/dp/B0F4CZTQLM)
**~~View all top sellers →~~**
### **Newest**
by launch date
[**Mikolo Leg Extension and Curl Machine Adjustable Leg Curl Machine for Home Gym Seated Leg Extension and Lying Leg Curl Machine Leg Workout Equipment with 1:1 Resistance System Black**Mikolo**$439.33**54 rev2mo ago](https://www.amazon.com/dp/B0H15CQK3T) [**Mikolo Leg Extension and Curl Machine Adjustable Leg Curl Machine for Home Gym Seated Leg Extension and Lying Leg Curl Machine Leg Workout Equipment with 1:1 Resistance System Red**Mikolo**$442.47**54 rev2mo ago](https://www.amazon.com/dp/B0H151LLLR) [**ANCHEER Leg Extension and Curl Machine Adjustable Leg Curl Machine for Home Gym 880LBS Seated & Lying Lower Body Workout Equipment Compatible with 1 and 2 Weight Plates**ANCHEER**$176.18**25 rev3mo ago](https://www.amazon.com/dp/B0GVSJC43P) [**Leg Extension and Curl Machine Adjustable Leg Curl Machine for Home Gym 4 in 1 Lower Body Workout Machine with 1000LB Capacity Leg Workout Equipment Compatible with 1 and 2 Plates**WFLGFT**$301.24**13 rev3mo ago](https://www.amazon.com/dp/B0GV3GMV88) [**GMWD Leg Extension and Curl Machine LE08 2.0 Adjustable Leg Curl Machine with Plate Loaded Seated Leg Extension and Lying Curl Machine for Home Gym Leg Workout Equipment**GMWD**$927.41**13 rev4mo ago](https://www.amazon.com/dp/B0GSPLBZJB)
**~~View all new products →~~**
### **Trending**
90-day click momentum
[**Leg Extension and Curl Machine Adjustable Leg Curl Machine for Home Gym 4 in 1 Lower Body Workout Machine with 1000LB Capacity Leg Workout Equipment Compatible with 1 and 2 Plates**WFLGFT**$301.24**4.4★**▲ 99%**](https://www.amazon.com/dp/B0GV3GMV88) [**Mikolo Leg Extension and Curl Machine Adjustable Leg Curl Machine for Home Gym Seated Leg Extension and Lying Leg Curl Machine Leg Workout Equipment with 1:1 Resistance System Black**Mikolo**$439.33**4.7★**▲ 99%**](https://www.amazon.com/dp/B0H15CQK3T) [**Mikolo Leg Extension and Curl Machine Adjustable Leg Curl Machine for Home Gym Seated Leg Extension and Lying Leg Curl Machine Leg Workout Equipment with 1:1 Resistance System Red**Mikolo**$442.47**4.7★**▲ 99%**](https://www.amazon.com/dp/B0H151LLLR) [**ANCHEER Leg Extension and Curl Machine Adjustable Leg Curl Machine for Home Gym 880LBS Seated & Lying Lower Body Workout Equipment Compatible with 1 and 2 Weight Plates**ANCHEER**$176.18**4.6★**▲ 93%**](https://www.amazon.com/dp/B0GVSJC43P) [**GMWD Leg Extension and Curl Machine LE08 2.0 Adjustable Leg Curl Machine with Plate Loaded Seated Leg Extension and Lying Curl Machine for Home Gym Leg Workout Equipment**GMWD**$927.41**4.8★**▲ 74%**](https://www.amazon.com/dp/B0GSPLBZJB)
**~~View all trending →~~**
## **What buyers say about leg extension machine**
What buyers praise and complain about, mined from review topics.
### **What buyers love **
**Quality-Overall**21%
*“Great Quality”*
**Value For Money**20%
*“Worth Buying”*
**Exercise/Sports Suitability**12%
*“Best exercise machine Ive ordered from Amazon”*
**Advertised Vs Actual Product**4%
*“Exactly what I wanted”*
**Size-Overall**3%
*“fits perfectly”*
**Adjustability/Rotatability/Reclining**3%
*“We like that its adjustable depending on height”*
**Stretchability/Expandability/Elasticity**3%
*“The strength curve for the leg extension is outstanding and very smooth”*
**Instructions/User Manual/Troubleshooting**3%
*“was easy and the directions were clear”*
**Ease Of Use**2%
*“Easy to switch back and forth”*
**Soft Feel**2%
*“Solid and smooth”*
### **What buyers complain about **
**Assembly/Installation**9%
*“Wrong size screws provided for assembly”*
**Quality-Overall**9%
*“My only complaint is that the quality control seems lacking”*
**Size-Overall**6%
*“I thought it was going to be smaller”*
**Durability**6%
*“Low durability, buyer beware”*
**Balance/Stability**4%
*“Unfortunately after a few weeks of light use, the main pivot joint went out of alignment and makes a heavy click/ shift at the top of the movement and is unstable”*
**Strength**3%
*“Flimsy”*
**Cushion**3%
*“the padding is not very good”*
**Unsustainable Design**2%
*“Bad engineering”*
**Value For Money**2%
*“I was informed it was too expensive for them to get a replacement”*
**Exercise/Sports Suitability**2%
*“it doesnt excel at either exercise”*
### **Top return reasons **
**Defective Material/Parts**32%
**Advertised Vs Actual Product**10%
**Functionality-Overall**9%
**Value For Money**8%
**Size-Overall**6%
**Comfort-Overall**6%
**Balance/Stability**4%
**Color**4%
**Quality-Overall**3%
**Scratch Resistance**3%
## **Common questions**
- **Is leg extension machine profitable to sell on Amazon United States?**
- The niche generates $2.9M/yr across 15 tracked products. 8 of 9 products launched in the last 360 days are still selling. 90-day search growth is +1.5%. Flapen's verdict: Skip it (46/100).
- **How competitive is the leg extension machine niche?**
- 11 brands and 19 sellers compete. The top 5 products take 72% of clicks and top 5 brands hold 84% of demand.
- **What do buyers complain about in leg extension machine?**
- Top complaints mined from reviews: Assembly/Installation, Quality-Overall, Size-Overall. The return rate is 0.4%.
- **When does demand for leg extension machine peak?**
- Demand is steady year-round — the busiest month runs 1.4× the quietest.
- **What does it cost to enter the leg extension machine niche?**
- Listings span $152.10–$3095.56; the average listing price is $492.10 (sweet spot $15–$100). The average incumbent carries 98 reviews — the moat a new listing must climb.
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