What Is Body Weight Support?

Body weight support means something carries part of your weight while you walk, run or exercise, so your legs carry less of it. You still move on your own. With LightSpeed Lift, elastic straps or a belt at your hips do the carrying, from 0 to 60 pounds.

It's used to keep training through an injury, to exercise with less impact, and in clinics for gait and balance work.

Support, lift and fall protection aren't the same thing

People use "support" for three different jobs. A LightSpeed Lift system can do all three, with different parts.

  • Lift takes weight off. That's the elastic straps or belt, clipped to the frame above your hips.
  • Steadiness keeps you centered. At 0 pounds of lift, the straps still hold you steady with nothing taken off.
  • Fall protection catches you if you go down. That's the overhead safety harness on the LSX-500. It doesn't lift you.

When someone says body weight support, they almost always mean the first one.

Two ways to take weight off

Every body weight support system does it one of two ways.

A frame that lifts from the hips

Straps or a belt at your hips clip to a frame over the treadmill. Usually called body weight support, offloading or unweighting.

A pressurized chamber

A sealed bag around your lower body is pressurized. Usually called an anti-gravity treadmill.

LightSpeed Lift is the first kind

It isn't a pressurized chamber, and we don't call it anti-gravity. Nothing attaches to your treadmill, and the open frame gives a coach or therapist a full view of your posture and stride.

Body weight support vs. anti-gravity treadmills

Why the hips

Your hips are your center of mass. Lifting there leaves the rest of you free to move the way you normally do: forward, side to side and turning. LightSpeed Lift's patented Lift From the Hip is built around that.

It came from a physical therapist. Malcolm Macaulay, MS, PT, has practiced for 38 years. He first tested a hip-centered lift on a patient walking again after having both knees replaced.

How it works, step by step

How much weight comes off

It's set for each person. On LightSpeed Lift, the LS-300 lifts 0 to 40 pounds, or 60 with the Super Lift Straps or Belt, and the LSP-400 and LSX-500 lift 0 to 60. The strap or belt you wear sets the range, and the height of the mounting points sets how much of it you use.

Divide by your body weight for a percentage. Sixty pounds off a 200-pound runner is 30%.

How much each strap and belt offloads

On a treadmill, and off it

Most body weight support happens on a treadmill. A LightSpeed Lift frame stands around the one you already have, if it's under 40 inches wide with at least 1.9 inches of clearance from the floor (1.2 inches for the LSX-500). Check your treadmill

The LSX-500 also works off the treadmill, for balance and functional exercise on the floor, with the overhead harness there in case of a fall.

What people use it for

  • Coming back from an injury. The athletes on our blog used it after bone stress injuries, an ACL and PLC injury, a hamstring tear and a muscle strain, to run before their legs could take full weight.
  • Training with less pounding. Some athletes keep it in their week once they're healthy, to stay that way.
  • Exercise at home. Walkers and runners of any age use it for lower-impact workouts.
  • Pregnancy. Some runners use it to keep running through pregnancy and to return after. Check with your physician first.
  • Clinics. Gait training, balance, strength and agility work, with adults and children, including patients with Parkinson's disease, multiple sclerosis and cerebral palsy. Always as part of a clinician's plan.

Who uses it, in their own words

Body weight support treadmills

System Made for Lift
LS-300 Home gyms 0 to 40 lb, 60 with a Super Lift Belt or Straps
LSP-400 Training rooms, gyms and rehab centers 0 to 60 lb
LSX-500 High-performance centers and clinical work 0 to 60 lb, overhead harness

Frequently Asked Questions

Something carries part of your weight while you move, so your legs carry less. You still do the walking or running yourself.

No. An anti-gravity treadmill is one way to do it: a sealed, pressurized chamber around your lower body. LightSpeed Lift does it another way, with a frame that lifts you from the hips.

Usually, yes. The LSX-500 is the exception: it's also built for balance and functional exercise on the floor.

Not on its own. On the LSX-500 the harness is there to catch a fall. The lift comes from the straps or belt at your hips.

On a LightSpeed Lift system, 0 to 60 pounds. The LS-300 lifts up to 40, or 60 with the Super Lift Straps or Belt.

Talk to us

Tell us who will use it and what for, and we'll help you pick a system. Call (218) 391-5459 or send us a message.

Body weight support treadmills explained · Compare the three

Related Articles

How Does Body Weight Support Work?

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

Body Weight Support vs. Anti-Gravity Treadmill: What’s the Difference?

A frame that lifts from the hips and a pressurized chamber are two different machines.

How Much Weight Can a Body Weight Support System Offload?

How offloading works, and what decides how much weight comes off.