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Keiser A300 Leg Extension Pro Machine (Unilateral)
Keiser A300 Leg Extension Pro Machine

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Product Code: KEISERA300LE

Keiser A300 Leg Extension Pro Machine - Ultimate Quad Workout
Safest & Most Effective Quad Workout!

This Leg Extension Pro is the best to demonstrate the superiority of Keiser Dynamic Variable Resistance over Iron. The quadriceps is one of the most powerful muscle groups in the body, producing very high forces at very fast speeds. The knee is vulnerable to injury at high degrees of flexion, which is why we lower the resistance at the beginning of the ROM and bring it on heavy in the middle before backing it off at full extension. This, along with your ability to work each leg independently at speed, maximizes your training results while protecting your joints and connective tissue. And remember, you can do heavy negatives on all Keiser Dynamic Variable Resistance machines.

Keiser’s Dynamic Variable Resistance is designed to provide a smooth consistent Variable Resistance force curve at any training speed. Each machine has its own unique Variable Resistance curve designed and tuned perfectly for the muscles being used in that particular exercise. For users, this means that working out any speed, you’ll always be training at maximum efficiency.

Pneumatic Resistance

Keiser equipment is air powered (pneumatic), meaning lighter, quieter equipment in your facility. Compressed air for Keiser equipment is delivered through Keiser’s custom designed air supply system. Keiser strength equipment weighs less and is quieter than iron-based machines.

Power Display
The Power Display provides both resistance information and repetitions performed in clear 1 inch numbers. The two window displays measure in either one pound or one kilogram increments for single station units and 1/10 pound or 1/10 of a kilogram increments for the infinity series. All displays come with the Keiser eChip system standard. The eChip system is a simple to use electronic workout card that recalls previous workouts and settings and downloads the data easily into a personal computer without wiring or equipment.

  • Offers unilateral movement – each limb can be trained symmetrically
  • Increased resistance range for more intense functional workouts
  • Smooth Keiser Dynamic Variable Resistance
  • Fully adjustable to accommodate a wide range of users
  • Bilateral movement for body symmetry training
  • Large digital displays with resistance and counted repetitions

  • Height: 26” / 661 mm
  • Width: 24” / 610 mm
  • Depth: 72” / 1829 mm
  • Weight: 113 lbs / 51 kg
  • Resistance Range: 5 - 245 lbs / 3 - 111 kg
  • Made in USA

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