Stamina X Adjustable Ab
- Roman Chair
- 250 pounds
- 1
- Carbon Steel
- More reviewed than 82%
A sturdy, budget-friendly folding hyperextension bench, worth checking against your height before buying if you are on the shorter side.
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How it ranks among the 24 roman chairs we track
4.3★ across 1,900 Amazon ratings, Bayesian-smoothed toward the category average.
1,900 Amazon ratings, weighted on a log scale so huge counts don't drown everything.
50+ bought on Amazon last month.
Brand identity, imagery, description and spec coverage.
The ProductDome score is separate from the Amazon rating shown above: it combines the Bayesian-smoothed Amazon rating with evidence volume, tracked demand, and data quality across the 24 roman chairs we track - how the scorecard works · full roman chairs data report. Confidence: medium - useful but incomplete evidence.Last refreshed Jul 5, 2026. Data-computed, not a hands-on test. Compiled by the ProductDome Research Team.
Overview
A foldable roman-chair style bench for back extensions and core work, with height-adjustable pads and leg rollers, built to fold flat for storage between sessions.
- Height-adjustable upholstered back and leg pads
- Pivoting foam leg rollers
- Compact folding frame for storage
- Muuv app with guided workouts and assembly videos
Who it's for
Works well for average-to-tall users wanting a foldable back extension bench that holds real weight plates. Reviewers under roughly 5-foot-6 report the geometry does not work for them, particularly for hip extensions.
What buyers say
From Amazon customer reviews.
Reviewers repeatedly call it sturdy for the price, holding 45 lb plates and users over 200 lbs with little flex, and most found assembly straightforward. The clearest complaint comes from shorter reviewers, several under 5-foot-6, who found even the lowest pad setting too long to position their hips correctly for hip extension work.
Strengths and trade-offs
Drawn from this product's published specifications.
- Sturdy at the price point, holds heavier plates without flex
- Folds flat for storage
- Non-slip handlebars and padded rollers
- Straightforward assembly for most users
- Shortest pad setting still too long for some users under 5-foot-6
- Footrest and pad positioning takes some trial and error
Performance notes
Height-adjustable back and leg pads let you set the fold point of the body for back extensions, with foam leg rollers meant to hold the ankles steady. The frame folds flat afterward rather than staying assembled full time.
Specifications
| Brand | Stamina |
|---|---|
| Model | 20-2015 |
| Dimensions & fit | |
| Weight Capacity Maximum | 250 pounds |
| Item Weight | 25 pounds |
| Item Dimensions D x W x H | 16 × 24 × 5 inches |
| Size | 39.5 inches |
| Construction & materials | |
| Material | Carbon Steel |
| Frame Material | Carbon Steel |
| Color | Red |
| Included components | |
| Unit Count | 1 |
| Other details | |
| Part Number | 20-2015 |
How it compares
This product against the closest alternatives we track in roman chairs.
| Product | Amazon rating | Ratings | ProductDome score |
|---|---|---|---|
| Stamina X Adjustable AbThis product | 4.3 / 5 | 1,900 | 3.9 / 5 |
| Sunny Health & Fitness Multi-Function Roman Chair with Dip Station & Sit-Up BenchSunny | 4.2 / 5 | 6,700 | 4.2 / 5 |
| Body-Solid Back Hyperextension Machine for Lower Back ExtensionBody-Solid | 4.5 / 5 | 204 | 4.1 / 5 |
| Marcy Adjustable Hyper Extension BenchMarcy | 4.4 / 5 | 3,300 | 4.1 / 5 |
| CAP Barbell Strength HyperextensionCAP | 4.4 / 5 | 369 | 4.1 / 5 |
Similar roman chairs from other brands
Questions about the Stamina 20-2015
Common buyer questions answered straight from the product spec data - no fluff, no "it depends".
Is this the same thing as a Roman chair?
Yes, it is a hyperextension or back extension bench, which is what Roman chair refers to in the category structure here.
Will it fit a shorter user?
Reviewers under about 5-foot-6 report even the shortest setting does not line up the hip pad correctly for hip extensions; taller users describe a comfortable fit.
Does it fold up for storage?
Yes, it is designed to fold flat when not in use.