Exercises and muscles targeted

Exercise	Muscles Targeted
Seated Biceps Curl (supinated grip)	Biceps Brachii (long and short heads, primary - supinated grip maximises bicep involvement), Brachialis (primary - elbow flexion driver regardless of grip), Brachioradialis (secondary)
Seated Biceps Curl (neutral grip)	Brachialis (primary - neutral grip removes bicep supination advantage and shifts primary load to brachialis), Brachioradialis (increased contribution in neutral position, secondary), Biceps Brachii (secondary)
Seated Biceps Curl - Wide Grip	Biceps Brachii - Short Head (inner bicep, increased with wider grip, primary), Brachialis (primary), Brachioradialis (secondary)
Seated Biceps Curl - Narrow Grip	Biceps Brachii - Long Head (outer bicep peak, increased with narrow grip, primary), Brachialis (primary), Brachioradialis (secondary)
Seated Biceps Curl - Isometric Hold (mid-range)	Biceps Brachii (sustained isometric at 90 degrees where the descending resistance curve places maximum effective load), Brachialis (sustained isometric), Brachioradialis (stabiliser)

The seated preacher-style arm pad position on the DSH018 removes shoulder joint movement from the curl by fixing the upper arm against the pad, which means the elbow flexors work through the full curl arc without any shoulder flexion assistance from the anterior deltoid. This is the same principle that makes preacher curls more isolating than standing barbell curls, but with a cam-matched resistance curve and adaptive handles that address the two main limitations of the traditional preacher curl - inconsistent resistance through the arc and fixed wrist position.

Who this machine is built for

Serious Home Gym Builders
Dedicated plate-loaded biceps isolation at 331 lbs single-horn capacity on a machine that fits within a 57.1" × 38.2" footprint is the most efficient biceps training investment per square foot in the DSH series. The DSH018 uses the same Olympic plates as the rest of your setup and trains the biceps in the arm-supported preacher position that no barbell, dumbbell, or cable curl alternative replicates with the same elbow isolation quality at progressive plate-loaded resistance.

Bodybuilders and Physique Athletes
Biceps peak height is a function of long head development, which is maximised by the narrow grip on the DSH018 where the long head carries more of the load. Inner biceps fullness and the short head sweep are developed by the wide grip setting. The adaptive dual-angle handles allow the wrist to supinate fully at the top of the curl where the bicep is shortest and most contracted, which is exactly where the peak contraction quality matters for hypertrophy and for the visual flexed bicep shape. The cam resistance curve ensures the muscle is loaded appropriately through the portion of the arc where it is weakest rather than reducing tension precisely where the contraction stimulus should be greatest.

Commercial Gym Owners and Operators
A plate-loaded seated biceps curl is the premium tier of dedicated arm isolation equipment that serious members look for in a facility stocked beyond standard selectorized arm machines. The DSH018's compact footprint, adaptive handle mechanics, and cam resistance curve distinguish it from basic cable curl and preacher curl stations in both engineering quality and training effectiveness. The 331 lb single-horn capacity exceeds any practical biceps training load requirement, and the matte black DSH series finish positions it clearly within the premium plate-loaded range.

Private Personal Training Studios
The gas spring seat adjusts between clients in under five seconds, and the wide curved arm pad self-accommodates different shoulder widths without manual pad repositioning. The adaptive handles remove wrist angle coaching from the trainer's focus during the set, allowing complete attention to elbow path, shoulder position, and contraction quality. The grip width options give a trainer meaningful programming variety within a single biceps session using one machine.

Powerlifters and Strength Athletes
Biceps and brachialis strength supports the lockout phase of the deadlift and the row movements used in accessory programming. The DSH018's arm-supported position allows these muscles to be loaded in isolation at progressive plate resistance without the grip and wrist strain that heavy barbell curl variations accumulate over time, making it practical for consistent use as an accessory arm machine across heavy training weeks.

How to setup and use

Setting Up the DSH018 Seated Biceps Curl

Load Olympic plates onto the single weight horn within the 331 lb maximum capacity.
Sit on the seat pad and use the gas spring pneumatic lever to raise or lower the seat until both upper arms rest naturally on the wide curved arm pad with the elbows aligned with the curl pivot axis.
The correct seat height places the front of the upper arm in full contact with the arm pad surface without the shoulder being forced upward or the elbow hanging off the pad's edge.
Grip both adaptive handles in your chosen width and orientation: wide for short head and inner bicep emphasis, narrow for long head and peak development, supinated for maximum bicep activation, neutral for brachialis emphasis.
Allow the handles to self-rotate to the natural starting wrist position before beginning the set — do not force the handles into a specific angle.
Load with Dynasty Fitness Urethane Grip Plates for a clean single-horn setup that protects the weight horn and provides the plate denomination range needed to progress load consistently.

Performing the Exercise

From the fully extended starting position with the arms straight and the biceps in a full stretch against the resistance of the cam system, curl both handles upward by contracting the biceps and bending the elbows.
Keep both upper arms pressed firmly against the arm pad throughout the entire curl arc — lifting the arms off the pad shifts the effort to the anterior deltoid and reduces biceps isolation.
Allow the adaptive handles to rotate naturally as the wrist supinates through the curl rather than gripping the handle tightly in a fixed position.
Curl to full peak contraction at the top, pause for one to two seconds, then lower back to the fully extended position under control over at least two to three seconds.
At the bottom of each rep, resist the urge to let the weight pull the arms into hyperextension at the elbow stop the descent at the full natural stretch position rather than using the arm pad as a stop.

Owner's Manual

Access the complete assembly guide, parts list, and maintenance schedule below.

Download Owners Manual

Shipping & Delivery

All Dynasty Fitness equipment ships free across the 48 contiguous US states via freight carrier. If the product description says preorder, we'll send you an estimated delivery date via email.

Estimated delivery: 7–14 business days from order confirmation. You will receive a tracking number and a delivery window confirmation call before your shipment arrives. Deliveries are curbside standard, white glove delivery to room of choice is available at checkout.

Returns: Free within 30 days of delivery. Items must be in original condition and packaging. Refunds processed within 5 business days of return receipt.

Questions? Contact our team at:
📧Email: info@thedynastyfitness.com
📞Call: +1 (213)-584-0858

Need a buying guide?

Looking for one to one support before making final decision?
Feel free to contact us. Our expert support team would love to assist you.

Need Installation Help?

We have partnered with another company to help provide installation around the country. Please use the link below to see the price per machine for installation
See Installation Rates

Payment & Security

Your payment information is processed securely. We do not store credit card details nor have access to your credit card information.

Save 10%

Seated Biceps Curl DSH018

$1,989.00

$1,989.00 ~~$2,219.00~~ 10% off (Save$230.00 )

Commercial Grade
Pay With HFA/FSA

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The Dynasty Fitness DSH018 Seated Biceps Curl is a plate-loaded bilateral preacher-style curl machine that trains the biceps brachii and brachialis through a seated arm-supported curl movement with two features that direct barbell and dumbbell curl alternatives do not provide: a descending resistance curve matched to the bicep's natural strength arc via a cam belt and pulley system, and adaptive dual-angle handles that automatically follow the wrist's natural supination path through the curl without the user needing to manage grip angle manually. A wide ergonomically curved upper-arm pad accommodates different shoulder widths without adjustment, and a gas spring pneumatic infinite seat positions users of any height correctly relative to the pivot with one-handed operation. Built from PT60×120×2.5mm steel with a 331 lb single weight horn capacity in matte black, the DSH018 is built for commercial gyms, personal training studios, and serious home gym setups where dedicated plate-loaded biceps isolation with controlled resistance curve and wrist-neutral mechanics is a training priority.

Plate-loaded seated biceps curl machine with a cam belt descending resistance curve that increases effective load through the weaker mid-range of the curl and reduces it at peak contraction, matching the resistance to the bicep's actual strength output through the full arc
Adaptive dual-angle handles automatically follow the wrist's natural supination path from the bottom of the curl through to the top, eliminating wrist rotation stress that barbell curls impose and allowing complete focus on bicep contraction quality
Wide ergonomically curved upper-arm pad anchors both arms simultaneously across different shoulder widths without manual pad adjustment, keeping the elbow position fixed so the biceps works through the full intended curl arc on every rep
Gas spring pneumatic infinite seat adjusts to any height with one hand so each user finds the precise elbow-to-pivot alignment that keeps the resistance arc correctly loaded through their specific forearm and upper arm proportions

Limited time offer

Get 20% off when you order 4 or more pieces of equipment!

Exercises and muscles targeted

Exercise	Muscles Targeted
Seated Biceps Curl (supinated grip)	Biceps Brachii (long and short heads, primary - supinated grip maximises bicep involvement), Brachialis (primary - elbow flexion driver regardless of grip), Brachioradialis (secondary)
Seated Biceps Curl (neutral grip)	Brachialis (primary - neutral grip removes bicep supination advantage and shifts primary load to brachialis), Brachioradialis (increased contribution in neutral position, secondary), Biceps Brachii (secondary)
Seated Biceps Curl - Wide Grip	Biceps Brachii - Short Head (inner bicep, increased with wider grip, primary), Brachialis (primary), Brachioradialis (secondary)
Seated Biceps Curl - Narrow Grip	Biceps Brachii - Long Head (outer bicep peak, increased with narrow grip, primary), Brachialis (primary), Brachioradialis (secondary)
Seated Biceps Curl - Isometric Hold (mid-range)	Biceps Brachii (sustained isometric at 90 degrees where the descending resistance curve places maximum effective load), Brachialis (sustained isometric), Brachioradialis (stabiliser)

Who this machine is built for

How to setup and use

Setting Up the DSH018 Seated Biceps Curl

Load Olympic plates onto the single weight horn within the 331 lb maximum capacity.
Sit on the seat pad and use the gas spring pneumatic lever to raise or lower the seat until both upper arms rest naturally on the wide curved arm pad with the elbows aligned with the curl pivot axis.
The correct seat height places the front of the upper arm in full contact with the arm pad surface without the shoulder being forced upward or the elbow hanging off the pad's edge.
Grip both adaptive handles in your chosen width and orientation: wide for short head and inner bicep emphasis, narrow for long head and peak development, supinated for maximum bicep activation, neutral for brachialis emphasis.
Allow the handles to self-rotate to the natural starting wrist position before beginning the set — do not force the handles into a specific angle.
Load with Dynasty Fitness Urethane Grip Plates for a clean single-horn setup that protects the weight horn and provides the plate denomination range needed to progress load consistently.

Performing the Exercise

From the fully extended starting position with the arms straight and the biceps in a full stretch against the resistance of the cam system, curl both handles upward by contracting the biceps and bending the elbows.
Keep both upper arms pressed firmly against the arm pad throughout the entire curl arc — lifting the arms off the pad shifts the effort to the anterior deltoid and reduces biceps isolation.
Allow the adaptive handles to rotate naturally as the wrist supinates through the curl rather than gripping the handle tightly in a fixed position.
Curl to full peak contraction at the top, pause for one to two seconds, then lower back to the fully extended position under control over at least two to three seconds.
At the bottom of each rep, resist the urge to let the weight pull the arms into hyperextension at the elbow stop the descent at the full natural stretch position rather than using the arm pad as a stop.

Owner's Manual

Access the complete assembly guide, parts list, and maintenance schedule below.

Download Owners Manual

Shipping & Delivery

All Dynasty Fitness equipment ships free across the 48 contiguous US states via freight carrier. If the product description says preorder, we'll send you an estimated delivery date via email.

Returns: Free within 30 days of delivery. Items must be in original condition and packaging. Refunds processed within 5 business days of return receipt.

Questions? Contact our team at:
📧Email: info@thedynastyfitness.com
📞Call: +1 (213)-584-0858

Need a buying guide?

Looking for one to one support before making final decision?
Feel free to contact us. Our expert support team would love to assist you.

Need Installation Help?

We have partnered with another company to help provide installation around the country. Please use the link below to see the price per machine for installation
See Installation Rates

Payment & Security

Your payment information is processed securely. We do not store credit card details nor have access to your credit card information.

Seated Biceps Curl DSH018

$1,989.00

$1,989.00 ~~$2,219.00~~ 10% off (Save$230.00 )

Key Features

Descending Resistance Curve

The DSH018 uses a cam belt and pulley system to create a descending resistance curve through the curl arc. At the bottom of the curl where the bicep is most stretched and mechanically weakest, the cam geometry produces a lighter effective resistance. Through the mid-range where the bicep generates maximum force, the cam increases the mechanical load. At the peak contraction position where the bicep is shortened and again less capable of producing force, the resistance decreases to a level appropriate for that position. Unlike a straight weight-on-lever system where the heaviest resistance point is fixed regardless of where the muscle is in its strength curve, the DSH018's cam-matched curve applies appropriate challenge throughout the arc rather than making part of the movement effortful and part of it trivial.

Adaptive Dual-Angle Handles

The handle assembly pivots on a handle pivot shaft with a torsion spring that allows both handles to rotate freely and independently through the curl arc, following the natural forearm supination that occurs as the wrist moves from a neutral position at the bottom of the curl to a fully supinated position at peak contraction. Grip width options from wide to narrow and grip orientation from supinated to neutral are available within the same handle assembly. Unlike fixed-angle handles that lock every user into the same wrist position regardless of their natural forearm rotation, the adaptive handles accommodate individual variation and eliminate the rotational wrist stress that fixed handles create.

Wide Curved Arm Pad

The arm pad curves ergonomically to match the shape of the upper arm and chest contact area, providing bilateral upper arm support across the full range of shoulder widths without requiring separate pad width adjustment. The curved surface keeps the upper arm in firm contact with the pad through the full curl arc rather than allowing the elbows to slide inward or outward as the load increases. Unlike flat arm pads that fit a narrow range of shoulder widths comfortably, the curved design distributes contact pressure evenly for users from narrower to wider shoulder profiles.

Pneumatic Infinite Seat Adjustment

The seat travels on inner and outer slides with three rollers, adjusting to any height via a gas spring assembly with a single-hand lever. The critical alignment requirement for a preacher-style curl machine is that the elbow sits at the correct height relative to the pivot so the resistance arc loads the bicep throughout the full range rather than only in part of it. Even a small height deviation changes the effective arc and alters when in the curl the resistance peaks. The gas spring system allows this alignment to be found precisely for each user rather than choosing between the nearest pin positions on a fixed adjustment.

Counterweight and Single Weight Horn

A counterweight on the resistance arm offsets the mechanical weight of the handle and arm assembly so the effective resistance at the starting extended position is the plate load rather than plates-plus-arm. This keeps the resistance accurate at the starting position where the bicep is most stretched. The single weight horn accepts Olympic plates at up to 331 lbs, which exceeds the practical loading range of any realistic bilateral biceps curl programme. Load using Dynasty Fitness Urethane Grip Plates for a clean plate setup on the single horn with the full denomination range needed for consistent progressive loading.

Product Information
Product Name	Seated Biceps Curl
Model	DSH018
Series	DSH Plate Loaded Series
Product Type	Plate-Loaded Seated Biceps Curl Machine
Primary Function	Bilateral seated preacher-style biceps curl with cam-matched resistance curve
Target Muscles	Biceps Brachii — long and short heads (primary), Brachialis (primary), Brachioradialis (secondary)
Grade	Commercial
Colour	Matte Black
Dimensions and Weight
Length	57.1 in (145.0 cm)
Width	38.2 in (97.0 cm)
Height	48.0 in (122.0 cm)
Net Weight	209 lbs (95 kg)
Load Capacity
Maximum Load Capacity	331 lbs (150 kg)
Loading System	Plate-loaded — Olympic plates, single weight horn
Resistance System
Resistance Curve	Descending cam belt and pulley system — matched to bicep natural strength arc
Counterbalance	Counterweight on resistance arm — offsets arm assembly mechanical weight
Arm Pivot Bearings	Bearings x2 and ball bearings x2
Adjustability and Handles
Seat Adjustment	Gas spring pneumatic — infinite, single-hand, tool-free
Seat Travel System	Inner and outer slides with 3 rollers
Handles	Adaptive dual-angle — auto-rotating via torsion spring, wide to narrow and supinated to neutral coverage
Pads and Frame
Arm Pad	Wide ergonomically curved bilateral upper-arm pad — accommodates various shoulder widths
Main Frame Tubing	PT60×120×2.5mm rectangular steel
Levelling Foot	1 x adjustable
Floor Feet	3 x rubber feet
Finish	Matte black powder coat
Indoor Use Only	Yes

Q: What is a descending resistance curve and why does it matter for biceps training?
A: A standard straight weight-on-lever system is hardest at the point where the mechanical disadvantage is greatest, which on a curl machine is typically in the mid-range of the movement. This means the rep is easiest at the bottom where the bicep is most stretched and at the top where the bicep is shortest, and hardest only through a portion of the arc. A cam-matched descending resistance curve adjusts the mechanical advantage through the curl arc to better follow where the bicep is actually strong and weak throughout its range. The result is more consistent tension across the full rep rather than a spike of difficulty in one zone and easy movement elsewhere.

Q: Why does the handle rotate automatically during the curl?
A: The bicep naturally supinates the forearm as it contracts. At the bottom of a curl the forearm is in a more neutral position and at the top it is fully supinated. A fixed handle forces the wrist to hold one position through the entire arc, which creates rotational stress at the wrist that interrupts the curl and limits how much attention can go to the bicep contraction quality. The adaptive handles on the DSH018 rotate to follow this natural path so the wrist stays in its natural position throughout the curl arc without the user managing it consciously.

Q: What grip width should I use?
A: Use shoulder-width grip as a baseline for balanced biceps development. If you want to prioritise the long head and outer peak, move to a narrower grip where the elbows sit closer together. If you want to prioritise the short head and inner fullness, move to the wider grip positions. Both are accessible within the adjustable handle assembly and can be rotated into on the same machine without changing anything else in the setup.

Q: How do I know my seat height is correct?
A: Sit with both upper arms resting flat on the curved arm pad. Your elbows should be at the front edge of the pad in a position where the arm can extend fully at the bottom of the curl without the shoulder lifting off the pad, and curl fully at the top without the shoulder pressing forward to gain range. If the shoulder lifts at the top of the curl, the seat is too low. If the elbow leaves the pad at the bottom of the extension, the seat is too high. Fine-tune from these reference points using the gas spring lever before loading to working weight.

Q: Can I train one arm at a time on the DSH018?
A: The DSH018 is a bilateral machine designed to work both arms simultaneously through the same arc. Unilateral curls are not a recommended use of this machine because the arm pad and resistance arc are configured for bilateral loading. For unilateral biceps isolation, cable machines or dumbbell preacher curl variations are the appropriate tools.

Q: What Dynasty Fitness machines pair with the DSH018 for a complete arm training programme?
A: The DSH018 covers bilateral seated biceps isolation with a cam-matched resistance curve. Pair it with the Seated Dips Press DSH016 for plate-loaded triceps and lower chest pressing that develops the full back of the upper arm. The ISO-Lateral Seated Biceps Curl DRE8031 adds independent arm cable-style bicep curls for unilateral arm development. The Seated Arm Curl/Extension DRE8044 covers both biceps and triceps from a single selectorized station for facilities wanting both muscle groups trained from one machine position.

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Every machine that leaves Dynasty Fitness carries the same promise: it is built to the commercial standard that professional training environments demand, priced so that standard is no longer exclusive to them, and backed by the support and warranty coverage that a long-term training investment deserves.

We are committed to equipment that stands the test of time — and to making sure the people who train the hardest have access to the tools that match their effort.