leg extension machine
Skip itPrices mostly outside the sweet spot ($152.10–$3095.56) — this niche doesn't clear our bar today.
Returns
Incredible0.4%return rate — above 6% kills the launch gate
Market size
Incredible$2.9M$2.9M/yr · 1.1M searches
Review moat
Incredible97.8avg incumbent reviews — the moat a new listing must climb
Quality gap
Good4.4★avg incumbent rating — lower means beatable quality
Brand share
Okay84%top-5 brand share — brands hold most of the demand
Growth
Okay+1.5%90-day search growth — must beat 0% to launch
Competition
Bad72%top-5 click share — a locked-up shelf
Conversion
Bad0.5%search→purchase rate — share of searches ending in a sale
Avg price
Bad$492.10avg listing price — sweet spot $15–$100
Price range
Bad$152.10–$3095.56cheapest 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
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.No pronounced peak months · busiest ÷ quietest = 1.4×
Top leg extension machine search terms
- leg extension and curl machine369K/yr
- leg extension machine158K/yr
- leg machine97K/yr
- leg curl machine93K/yr
- leg extension84K/yr
- leg machines home gym57K/yr
- leg curl extension machine45K/yr
- hamstring curl machine35K/yr
- ritfit leg extension and curl machine26K/yr
- leg curl27K/yr
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.
All 15 tracked products in this niche — three views at once, no toggling.
Top sellers
by 90-day click share
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$193.144.5★168 rev
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$439.334.7★54 rev
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$257.244.5★367 rev
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$442.474.7★54 rev
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$201.853.9★106 rev
Newest
by launch dateMikolo 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$439.3354 rev
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$442.4754 rev
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$176.1825 rev
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$301.2413 rev
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$927.4113 rev
Trending
90-day click momentumLeg 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$301.244.4★
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 Black
Mikolo$439.334.7★
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$442.474.7★
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$176.184.6★
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$927.414.8★
What buyers say about leg extension machine
What buyers praise and complain about, mined from review topics.What buyers love
“Great Quality”
“Worth Buying”
“Best exercise machine Ive ordered from Amazon”
“Exactly what I wanted”
“fits perfectly”
“We like that its adjustable depending on height”
“The strength curve for the leg extension is outstanding and very smooth”
“was easy and the directions were clear”
“Easy to switch back and forth”
“Solid and smooth”
What buyers complain about
“Wrong size screws provided for assembly”
“My only complaint is that the quality control seems lacking”
“I thought it was going to be smaller”
“Low durability, buyer beware”
“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”
“Flimsy”
“the padding is not very good”
“Bad engineering”
“I was informed it was too expensive for them to get a replacement”
“it doesnt excel at either exercise”
Top return reasons
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.