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Downshift Golf Project Redline Fitness GRF Swing Trainer

Name: Downshift Golf Project Redline Fitness GRF Swing Trainer
Brand: Downshift Golf
SKU: REDLINE
Price: 149.0 USD
Availability: InStock

● Available in US

In Stock

— Ships in 1–2 business days

$199.00 Save $50.00

$149.00

Step 03 · Ground force — Speed & Distance

4 bands

Included

3 resistance levels

Light/medium/heavy

Steel carabiners

Hardware

The full Project Redline training system for ground reaction force development. Four resistance bands in three levels, a stabilizer bar, handles, and a door anchor — so you can train the torque, lateral, and vertical forces that drive clubhead speed at home, without a training partner or a force plate.

Authorized

Official dealer

Fast Dispatch

US & UK

30 Days

Easy returns

Expert

Real golfers

Common questions

The Project Redline system uses Reactive Neuromuscular Training (RNT) — resistance applied in the opposite direction of the movement you want to produce. When a band pulls you off the correct path (say, pulling your lead hip backward during the downswing), your nervous system fires the muscles needed to resist and correct the movement. Those muscles learn the correct sequence faster than repetition alone teaches. Applied to the golf swing, the bands train the torque, lateral shift, and vertical push-off forces that generate power from the ground up.

The kit includes four bands in three resistance levels (2 light/red, 1 medium/gray, 1 heavy/black), a stabilizer bar, a pair of handles, and a door anchor. The stabilizer bar allows bilateral training — compound movements that work both sides of the body at once, rather than just single-arm or single-side drills. The handles provide additional grip positions for varied exercises. The door anchor means you can set up and train solo in any room without a training partner holding the band.

The Travel Kit is bands only — three bands, no bar, no handles, designed for portability and travel. The GRF Swing Trainer is the full system: four bands across three resistance levels (combinable for more total resistance), the stabilizer bar for bilateral compound movements, handles for varied grip positions, and a door anchor for solo use anywhere. If you travel often and want something that fits in your bag, the Travel Kit is the entry point. If you're building a home training setup, the GRF Swing Trainer is the more complete and versatile tool.

No. The kit is self-contained — the door anchor means you don't need a rack, cage, or training partner. You can start with the light bands and progress through medium and heavy as the movement patterns improve. You can train with or without a golf club, with or without hitting a ball. The movements work on their own before you add the complexity of a swing.

Why we curate

Why this earns the slot.

Pressure boards address lateral weight shift. Speed sticks address swing speed. The Project Redline GRF Swing Trainer addresses the third piece — torque and vertical force — which is what connects the first two. A golfer can shift their weight correctly and still lose power if the rotation doesn't sequence efficiently from the ground into the upper body. The RNT method, where a band pulls you in the wrong direction so the right muscles fire to resist it, is a legitimate training approach backed by biomechanics research. The door anchor is what makes this practical: one person, at home, can train the same ground force drills that professionals use on force plates. The four-band system with steel carabiners and a proper bar is notably more durable than what most resistance band kits in this price range deliver. Paired with the Downshift Pressure Board, this is a complete ground mechanics training system without duplicating what either tool does alone.

Authorized Downshift Golf dealer (US)

Bands included

2 light (red) + 1 medium (gray) + 1 heavy (black)

52 inches

Band length

Each band — longer than most resistance band kits

Steel

Carabiners

Not plastic — hardware built to last under training loads

All GRF types

Trains

Torque (rotational), lateral, and vertical ground reaction forces

Specifications

Everything you need to know.

Bands included	4 (2 light/red + 1 medium/gray + 1 heavy/black)
Resistance levels	3 (light, medium, heavy) — combinable for varied resistance
Band length	52 inches each
Carabiner material	Steel (not plastic)
Includes	Stabilizer bar, pair of handles, door anchor
Training method	RNT — Reactive Neuromuscular Training
GRF types trained	Torque (rotational), lateral, vertical
Anchor requirement	Door anchor included — no training partner needed
Warranty	2 years

What's in the box

Everything you need.

Ready out of the box. No extra accessories required.

4x Resistance bands (2 light/red + 1 medium/gray + 1 heavy/black)
Each band: 52 inches long
1x Stabilizer bar
1x Pair of handles (2 handles)
1x Door anchor
2-year warranty.

Note Steel carabiners on all attachments.

About this product

Train the forces that generate power

The Project Redline Fitness GRF Swing Trainer is Downshift Golf's complete home training system for ground reaction forces. Four resistance bands, a stabilizer bar, handles, and a door anchor — everything you need to train the torque, lateral, and vertical forces that determine how much of your body's power actually reaches the clubhead.

What ground reaction forces are and why they matter

The golf swing generates power through a kinetic sequence: pressure into the ground on the backswing, lateral weight shift on the downswing, rotational torque through impact, and a vertical push-off as the club meets the ball. Most amateur golfers generate speed with their arms and upper body. Elite ball strikers start from the ground. Project Redline trains that pattern directly.

How RNT training works

Reactive Neuromuscular Training (RNT) applies resistance in the opposite direction of the movement you want to produce. If a band pulls your hips backward when they should be shifting forward, your nervous system fires the correct muscles to resist — and learns the movement pattern faster than repetition alone can teach. The door anchor means you train solo, at home, without a force plate or coaching assistant. You anchor the band to the door, set your position, and let the resistance do the teaching.

Built for serious use

Four bands across three resistance levels — 2 light (red), 1 medium (gray), 1 heavy (black), each 52 inches long — can be combined for varied total resistance as strength and movement quality improve. Steel carabiners on all attachments (not plastic) hold up under training loads. The stabilizer bar enables bilateral compound movements that unilateral band work alone can't replicate.

Two-year warranty. Pairs with the Downshift Pressure Board for a complete ground mechanics training system — the board trains lateral pressure shift; Project Redline adds torque and vertical force training to complete the picture.