Hoist Leg Curl/Leg Extension - HD-3400 White

What our Experts Think

• Dual-function lower body station: Combines leg extension and leg curl in one commercial-grade machine for complete quad and hamstring training
• Smooth biomechanics design: Self-aligning roller pad ensures proper leg positioning and reduces joint strain during movement
• Highly adjustable setup: 8 back pad positions allow precise alignment for users of all sizes and optimized knee joint positioning
• Controlled range-of-motion system: Adjustable exercise arm settings let users fine-tune extension and curl depth for comfort and progression
• Commercial HD Dual Series build: Heavy-duty frame designed for consistent performance in high-traffic gym environments
• Ergonomic stability focus: Thigh stabilization pad keeps the body secure for strict, isolated lower-body training
• Space-efficient 2-in-1 design: Replaces two machines while maintaining full training functionality and smooth workflow
• Heavy-duty construction: Approx. 557 lb machine weight ensures solid stability under heavy loads

Q&A

Q1: What is the Hoist HD-3400 used for?
A: It is a commercial dual-function machine designed for both leg extension and leg curl exercises, targeting quadriceps and hamstrings in one compact unit.

Q2: What makes the HD-3400 different from standard leg machines?
A: It features HOIST’s HD Dual Series design with multiple range-of-motion adjustments, allowing users to fine-tune movement for better biomechanics and comfort.

Q3: What adjustments does the machine offer?
A: It includes 8 back pad adjustment settings plus multiple range-of-motion settings for both leg extension and leg curl exercises, ensuring proper alignment for different users.

Q4: How does the movement feel during training?
A: The self-aligning roller pad automatically adjusts to the user’s leg position, helping reduce joint stress and improving exercise accuracy.

Q5: What muscles does it target?
A: It isolates the quadriceps during leg extensions and the hamstrings during leg curls for balanced lower-body development.

Q6: What is the weight stack capacity?
A: It comes with a 215 lb standard weight stack, with optional upgrades depending on configuration.

Maintenance Tips

• Daily cleaning: Wipe seat, back pad, ankle roller, and frame to prevent sweat buildup and preserve upholstery finish.
• Check adjustment system: Ensure the 8 back pad positions and ROM adjustment pins lock securely and move smoothly for both leg extension and curl setups.
• Inspect roller pad: Confirm self-aligning ankle roller rotates freely and stays firmly attached for proper knee tracking and comfort.
• Lubricate pivot points: Apply light silicone/PTFE lubricant to the main pivot arm and adjustment joints for smooth, quiet motion.
• Tighten hardware: Regularly inspect bolts and frame connections to maintain stability under heavy commercial use (~557 lb machine).
• Cable/stack check: Ensure weight stack moves evenly with no sticking, noise, or misalignment; verify selector pin engagement.
• Pad condition check: Replace worn thigh stabilizer and ankle pads to maintain proper biomechanics and user safety.
• Floor stability: Confirm unit is properly bolted down as recommended to prevent tipping during heavy leg work.