The U.S. Kids Golf RS39 Swing Speed Trainer is a purpose-built training aid designed to help young golfers develop a faster, more powerful swing — the right way. By allowing juniors to swing a club with a significantly lighter head than a standard weighted club, the trainer conditions the key muscle groups involved in the golf swing, promoting long-term increases in club head speed and overall athletic development. Just five minutes of daily practice can translate directly into longer, straighter drives on the course.
The core principle behind the RS39 Swing Speed Trainer is overspeed training — a technique used by professional golfers to build faster swing mechanics. By swinging a club with a lighter-than-normal head, the neuromuscular system is trained to fire faster, creating a tempo and timing pattern similar to what Tour players exhibit. Over time, this adaptation carries over directly to regular clubs, producing measurable gains in club head speed. The result is a more athletic, fluid swing that generates greater power without forcing or overswinging.
Consistent, short sessions with the Swing Speed Trainer lead to lasting increases in club head speed — not just during the training session, but permanently as the golfer's muscles adapt. Even just five minutes of daily use is enough to stimulate the speed adaptation process, making this an efficient and highly effective addition to any junior practice routine. Greater club head speed means greater ball speed, which means longer drives and shorter approach shots on the course.
The RS39 Swing Speed Trainer features a shaft length of exactly 99 cm (39"), which is identical to the driver in the U.S. Kids Golf UL39 Ultralight series. This deliberate design choice ensures that every swing made with the trainer directly mirrors the movement pattern used with the player's actual driver. There is no awkward adjustment period or transfer problem — the muscle memory built during training sessions translates seamlessly to real on-course performance.
Unlike training aids that isolate a single movement or force the golfer into an artificial position, the RS39 Swing Speed Trainer allows the swing to develop naturally. Because the club is lighter, young golfers can swing with full commitment and freedom, letting the body discover the most efficient path through the hitting zone. This supports healthy, natural biomechanical development at a stage when good habits are easiest to form — and hardest to break once established.
The RS39 Swing Speed Trainer is fully ambidextrous, making it suitable for both right-handed and left-handed young golfers without any modification. Parents and coaches do not need to purchase a separate version for left-handed players — one trainer serves the whole family or an entire coaching group. This universal design also makes the trainer a practical and cost-effective tool for junior academies and school golf programs.
| Specification | Detail |
|---|---|
| Product Name | U.S. Kids Golf RS39 Swing Speed Trainer |
| Shaft Length | 99 cm (39" / approx. 26 inches) |
| Matching Club Size | UL39 series driver (same shaft length) |
| Hand Orientation | Left- and right-handed (ambidextrous) |
| Recommended Use | Minimum 5 minutes daily swing speed training |
| Player Height Range | Designed for players sized to RS39 / UL39 equipment |
| Category | Junior golf training aid |
| Brand | U.S. Kids Golf |
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