SportsArt P857 Performance Selectorized Leg Extension Machine
An Important Note on Pricing and Returns:
We believe in upfront pricing and fair policies—no hidden fees, no surprises, and easy, transparent
returns. If you're comparing options, we encourage you to review competitors’ fine print carefully.
We've helped countless customers who had issues elsewhere, and we’re here to make sure that never
happens to you.
Official Distributor
An Important Note on Pricing and Returns:
We believe in upfront pricing and fair policies—no hidden fees, no surprises, and easy,
transparent returns. If you're comparing options, we encourage you to review
competitors’ fine print carefully.
We've helped countless customers who had issues elsewhere, and we’re here to make sure
that never happens to you.
Starts at: $1,073.75/mo Learn More
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Monthly payments start at: $1,073.75/mo Learn More
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Product Information
The SportsArt P857 Performance Leg Extension focuses selectorized resistance on the quadriceps from a
supported seated position.
Users adjust the seat-back cushion for posture, align the knee with the machine pivot, position the leg
cushion for lower-leg contact, and select an appropriate starting angle.
Multiple start positions and range-limiting adjustment establish the desired exercise arc, while a
strength-curve-matched cam delivers smooth resistance through knee extension.
Compact Performance Series construction, marine-grade upholstery, commercial frame components, and a
guided weight stack support repeated facility training.
Product Features
A supportive seated layout aligns the quadriceps exercise path while the adjustable back cushion accommodates different body positions.
The lower-leg cushion adjusts for varied leg lengths, and multiple starting positions help establish an appropriate extension angle.
Range-limiting control and a strength-curve-matched cam coordinate the selected movement arc with smooth selectorized resistance.
Quadriceps Extension Training
Adjustable Seat Back
Adjustable Leg Cushion
Strength-Curve Resistance Cam
SportsArt P857 Performance Leg Extension
Supported Seated Posture:
The adjustable seat back helps establish stable torso support before the user aligns the knee with the
movement pivot.
Individual Leg Alignment:
An adjustable lower-leg cushion accommodates varied leg lengths and creates consistent contact during
extension.
Configurable Starting Angle:
Multiple start positions and range control allow the exercise arc to be set for controlled knee
extension.
Purposeful Resistance Curve:
The matched cam shapes selectorized resistance through the movement while compact commercial
construction supports facility use.
About SportsArt
SportsArt develops commercial cardio, strength, and functional training equipment for fitness facilities. Its range emphasizes durable facility-focused construction, biomechanically considered exercise design, and training formats that support varied users across professional environments.
Why Choose Us?
Choose Peak Primal Wellness for a personalized, community-driven approach to health. We prioritize your well-being with high-quality products, tailored solutions, and 24/7 support.
As a family-owned business, we build lasting relationships, offering authentic, effective solutions to help you achieve your wellness goals.
Join our thriving community and embark on a journey toward optimal health with passionate professionals who genuinely care. At Peak Primal Wellness, you're not just a customer—you're family.
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Specifications
| Official Model Number | P857 official model |
| Primary Exercise Purpose | Seated selectorized quadriceps extension training |
| Overall Machine Dimensions | 53.1×41×57 inches / 135×104.2×144.7 centimeters |
| Total Machine Weight | 407 lb / 184.5 kg |
| Standard Stack Weight | 176 lb / 80 kg |
| Maximum User Capacity | 500 lb / 227 kg |
| Starting Resistance Weight | 13.2 lb / 6 kg |
| User Adjustment Design | Adjustable back and leg cushions |
| Starting Position Design | Multiple selectable exercise starting positions |
| Range Limiting Design | Adjustable start-and-stop exercise range control |
| Resistance Cam Design | Strength-curve-matched resistance cam |
Warranty & Returns
Return Policy
To request a return or refund, customers can use our contact form, email info@peakprimalwellness.com, or phone – (877) 689-4898 . Once the product is inspected and confirmed to be in brand new condition, we will initiate the refund, which typically takes 5–7 business days to post back to the original payment method. Refunds can be applied via the customer’s preferred method, including card or bank transfer. Shipping instructions and the return address will be provided upon contacting customer service. Please include photos if the product arrives damaged. Click here to view our complete return policy for more details.
Shipping Policy
Customers may contact us by phone or email anytime to inquire about the status of their order. While we may not always have a tracking link available before the order ships, we are happy to check its current status for you. If an item is never received, please contact us immediately. We will promptly file a claim on your behalf and ship a replacement to ensure you receive your product as soon as possible. Click here to view our complete Shipping policy for more details.
Frequently Asked Questions
How is the seat back adjusted?
Move the back cushion until the knee aligns with the machine pivot, then confirm the adjustment is securely locked.
How is the leg cushion positioned?
Set the cushion against the lower leg above the ankle while maintaining knee alignment and comfortable contact.
How is a starting position chosen?
Select a starting angle that supports controlled extension without forcing the knee beyond a comfortable position.
How is the range limiter set?
Choose the intended movement boundary, engage the range control fully, and test the unloaded path before selecting resistance.
How is resistance selected?
Insert the selector completely into the desired plate while the stack is stationary, then verify engagement before exercise.
How should posture be maintained?
Keep the back supported, hips centered, and knees aligned with the pivot throughout each controlled repetition.
How should upholstery be cleaned?
Use a soft damp cloth with an approved mild cleaner and dry the seat and cushions before reuse.
How should stack travel be checked?
Observe slow stack movement and have qualified personnel address binding, irregular plate separation, or unusual guide-rod noise.
