How Much Weight Can a Body Weight Support System Offload?

A Body Weight Support system offloads anything from a few pounds to a large share of your weight, and the amount is set for each person. A LightSpeed Lift system offloads from 0 to 60 pounds. Two things set the amount: the strap or belt you wear, and the height of the mounting points.

How much you use depends on your goal, and you can change it from one set to the next. Here's what each part of the system does.

How much each LightSpeed Lift strap and belt offloads

The lift comes from elastic cords in the strap or belt you clip to the frame.

Strap or belt Lift Made for
Lift Straps (pair) 0 to 40 lb, adjustable Everyday training. They attach to the Magic Shorts.
Super Lift Straps (pair) 0 to 60 lb, adjustable More lift, and more side-to-side support for balance.
Universal Lift Belt Up to 40 lb Worn over regular clothes, with leg wraps. No changing needed.
Super Lift Belt Up to 60 lb Users with balance problems, or who need more support.
Pediatric Lift Belt Up to 25 lb Users who weigh under 60 lb.
Overhead Safety Harness No lift Fall protection. It comes with the LSX-500.

At 0 pounds the straps still do something. They keep you centered and steady, with no weight taken off.

The LS-300 comes with Lift Straps and a Universal Lift Belt, so it lifts up to 40 pounds as it comes. Add the Super Lift Straps or the Super Lift Belt, ordered as extras, and it lifts up to 60.

Lift Straps · Super Lift Straps · Super Lift Belt · Pediatric Lift Belt

What that is as a percentage

Divide the pounds offloaded by your body weight.

  • 40 pounds off a 200-pound runner is 20%.
  • 60 pounds off the same runner is 30%.
  • 25 pounds off a 50-pound child is half their weight.

So the same strap lifts a bigger share of a lighter person. The Pediatric Lift Belt is calibrated for users under 60 pounds for that reason.

Changing the lift as you go

You set the lift by moving the mounting points up or down the uprights. A coach or therapist can change it between exercises or between sets. Nothing needs recalibrating.

As strength and balance come back, the mounting points are moved a little at a time to take lift away.

How much offload is right for you

It depends on why you're using it.

  • Training: athletes use lighter lift to keep training with less stress on their joints.
  • Low-impact exercise: people walking or running for fitness pick a level that feels steady and comfortable.
  • Rehab and gait training: patients often start with more lift and step it down as they heal.

In a clinic, your physical therapist or physician sets the amount. In training, it's you or your coach. Always check with your physician if you have a medical condition, are pregnant or are coming back from surgery.

Which system fits the support you need

All three systems lift from the hips, so you walk and run with your natural stride.

  • LS-300: 0 to 40 lb, or 60 with the Super Lift Straps or Belt. 1.5-inch steel tubing and a low profile. Made for home gyms.
  • LSP-400: 0 to 60 lb. 2 x 3-inch steel tubing for extra stability. Made for training centers, rehab clinics, fitness centers and upscale home gyms.
  • LSX-500: 0 to 60 lb. Taller uprights for taller and heavier users, plus the overhead safety harness. Made for balance training, neurological rehab and sprint work.

Not sure which one fits? The buying guide compares them side by side.

There's no maximum user weight on any of the three systems.

Each one stands over the treadmill you already have. Your treadmill has to be under 40 inches wide and sit at least 1.9 inches off the floor (1.2 inches for the LSX-500). Check your treadmill

Compare the LightSpeed Lift systems

Frequently Asked Questions

60 pounds on any LightSpeed Lift system, with the Super Lift Straps or the Super Lift Belt. The standard Lift Straps and the Universal Lift Belt go up to 40 pounds. On the LS-300 the Super Lift Straps and Belt are ordered as extras.

Yes. Set to 0 pounds, the straps keep you centered and steady without taking any weight off.

Yes. Move the mounting points between exercises or between sets. Nothing needs recalibrating.

The Pediatric Lift Belt is made for users under 60 pounds and lifts up to 25 pounds.

No. It catches a fall. The lift comes from the straps or belt at your hips.

Your physical therapist or physician sets that, based on your surgery and how you're healing.

Get the right setup

Tell us your weight, your goal and your treadmill, and we'll tell you which system and which straps or belt to get. Call (218) 391-5459 or send us a message.

Related Articles

How Does Body Weight Support Work?

Elastic straps at your hips, a frame over your treadmill, and how the lift is set.

Who Uses Body Weight Support Treadmills?

Runners, walkers, pregnant runners and clinics, mostly in their own words.

Body Weight Support Treadmill Buying Guide

How to choose a system for your space, the people who'll use it and your goals.