Back Extension

The BACK EXTENSION 4000 is a strength-training equipment that will strengthen the muscles of the back by raising the upper body. It can help prevent problems with posture and "wear and tear" of the spine.

Technical Specifications

Muscles worked Mm. erector spinae
Dimensions (L /W/H cm) 100 /120/155
Weight approx. 235 kg
Power connection 230 V (only for devices with the suffix S)
Max user weight 200 kg
Max. weight load 100 kg
Weight increments 5 kg
Settings lever arm

Device is available in the following variants:


  • 4000
  • 4000 MED
  • 4100 S
  • 4100 S MED

  • S - suitable for training control with Vitality System 6
  • MED - corresponds to Medical Device Directive 93/42 / EEC


  • Frame color silber-grey, white or signal black
  • Cover silber-grey or papyrus white
  • various freely selectable upholstery colors


Product catalog

Complete catalog of all products
(PDF, 4,2MB)

Owner‘s manual
Power Line 4000

Last update: January 2017
(PDF, 7,4MB)