Unlock your backswing: mobility, stability, and the faults that steal your power
Most golfers who struggle with their swing are looking for the answer in the wrong place — watching their hands, adjusting their grip, chasing shaft parallel at the top. In my experience working with golfers through a TPI (Titleist Performance Institute) lens, the real culprits are often physical, or a combination of physical and mechanical. And they start from the ground up.
Your golf swing is a chain reaction. What happens at your hips determines what your trunk can do. What your trunk does determines what your shoulder can do. What your shoulder does determines what your elbow/forearm/hands/wrist have to compensate for. Every swing fault you’ve been told to fix usually has a physical reason behind it, and it almost always comes down to two things: mobility and stability.
Why golfers lose distance: the mobility-stability problem
Mobility is your ability to move through a range of motion. Stability is your control within that range. For golf, you need both working together. Chasing mobility without stability gives you a long, loose, inconsistent swing; chasing stability without mobility gives you a short, restricted, effortful one.
These qualities alternate by joint throughout the body. Your hips and thoracic spine (mid-back) are primarily mobility joints — they need to move freely mostly into rotation. Your lumbar spine (lower back) and knees are stability structures — they need to hold steady so everything above and below can do its job.
When a mobile joint becomes restricted, or a stable structure becomes loose, compensations ripple through the chain and show up as swing faults or compensations. Usually the same ones you’ve been trying to fix for years.
Try this right now: slump forward, cross your arms over your chest, and rotate right as far as you can. Now sit up straight, lift your breastbone, pull your shoulder blades down and together and rotate again. Feel the difference? That’s the immediate impact of posture on rotation, and it costs nothing to improve.
Restricted backswing? Here’s what your body is actually doing
A good backswing pivot demands seamless rotation to build coil and store elastic energy. Two areas are critical: your hips and your thoracic spine. When either is restricted, something else in the chain compensates and that compensation is almost always visible in your swing and eventually felt in your lower back.
Hip Internal Rotation: The most overlooked backswing limiter
For a right-handed golfer, the right hip must move into internal rotation during the backswing. That’s what allows the trunk to coil fully over a stable lower body. If this is restricted — which is extremely common, especially in golfers who sit for long periods of the day — the hip stops rotating before the turn is complete. The trunk above it compensates by either standing up (losing spine angle) or allowing the elbow to bend to create the appearance of more turn. Neither can be fixed with swing instruction alone. Fix the physical restriction, and the fault can resolve on its own but often needs good coaching to harness your newfound mobility into a sound swing mechanic.
Tight Mid-Back and the Lat: Why your shoulder can’t finish the turn
The same compensatory pattern occurs when the thoracic spine can’t rotate fully.
A tight latissimus dorsi (the large back muscle running from your pelvis all the way to your upper arm) is one of the most common drivers. Because the lat attaches directly to the arm, tightness there limits the left shoulder’s ability to move freely into the backswing. That restriction travels straight down the chain to the elbow.
Poor posture compounds everything: forward head posture and rounded shoulders limit thoracic rotation range and shorten the lat simultaneously. Better posture at address isn’t just about looking good over the ball; it’s about having the structural freedom to actually rotate with greater ease.
Single-Leg Balance Test: Can your body hold your swing together?
Mobility without a stable base is equally limiting — you need somewhere solid to rotate around. Try this: stand tall, lift one foot off the ground, cross your arms over your chest, and rotate your upper body as you would at the top of your backswing. Wobbling? Locking up? Your core, hips, and ankles aren’t coordinating the way the swing demands. Switch legs and try again. Most golfers find one side significantly weaker than the other, and that asymmetry shows up directly in their ball-striking consistency.
Bent lead arm in golf (it’s not an elbow problem)
A bent lead arm at the top of the backswing is one of the most common faults golfers are told to fix, and almost all of the instruction they get is purely mechanical: keep your left arm straight. But the breakdown almost never starts at the elbow.
The quest for shaft parallel is usually what causes the bend in the first place. Most amateur golfers physically cannot achieve a parallel position without creating compensations somewhere in the chain — and a bent elbow is the most common one. It gives the sensation of a full turn without the body actually earning it, introduces an energy leak, and makes solid contact harder to time and repeat. Here’s the actual chain of events, starting from the ground:
- Right hip restriction: Limited internal rotation in the right hip prevents a full trunk coil. The elbow bends to chase the feeling of parallel.
- Thoracic restriction: If the mid-back can't rotate freely, the bent elbow creates the illusion of more turn without the body actually achieving it.
- Tight lat: The lat connects the back directly to the arm. When it's tight, it limits left shoulder range of motion, and the elbow bends because the shoulder literally cannot go any further.
- Left shoulder restriction: Upper arm muscles span from above the shoulder joint, around the back, and down below the elbow. Restriction anywhere in this chain affects everything downstream.
A straight lead arm isn’t a position you force. It’s the natural result of a body that can actually turn. Address the restrictions, and the arm straightens on its own. And until your restrictions are corrected, consider shortening your swing to find greater consistency.
Visit our Golf Resource Hub for more mobility exercises and strategies to improve your swing while preventing injuries.
Golf downswing power: why your glutes are the most important muscle
Once you’re at the top of your backswing — however you got there — you have to get back to the ball. And this is where a different physical quality takes over: strength.
The downswing begins with a weight shift toward the left side, which requires the right leg to shift pressure to the lead side and then the right hip to uncoil from internal rotation toward neutral. The glute maximus drives this movement — it is, in my view, the single most important muscle in the golf swing. The right glute max uncoils the hip and pushes body weight left, and that push-off is what starts the chain reaction of the downswing.
As weight shifts left, the left leg pushes down and forward (“posts”), straightening to become the stable pivot point around which the pelvis and trunk finish rotating through impact and into the finish. A golfer may transfer up to 95% of body weight onto that left leg. If it can’t handle that load, the pivot collapses. And so does the swing.
Squats, Lunges, and Single-Leg Balance: The golf strength triad
The most effective lower-body exercises for golfers load the body the same way the swing does — feet on the ground, working against gravity. Squats and lunges are my two favorites. Two form keys that matter enormously: keep your knee aligned with your hip and ankle throughout the movement (your knees should appear outside your feet when looking down, to actually be in true alignment), and don’t let your knee travel past your toes at the deepest point. Adding trunk rotation with a dumbbell or kettlebell engages your core through the movement, which mirrors exactly what the downswing demands. Before adding any rotation, pre-load your core first: gently draw your navel toward your spine at about 20–30% of a maximal effort before the movement begins. This builds muscular support for your spine and protects your lower back under load.
Single-leg balance work is the most underrated golf exercise there is. If you can’t stand on your left leg unassisted and controlled, you will struggle to finish your pivot. Practice it whenever you think of it … at the kitchen counter, watching television, or brushing your teeth. Add left trunk rotation while balancing to simulate exactly what that hip has to manage through the swing.
If you’re ready to take your golf-specific strength work further, our cable machine exercises for golfers goes deeper on the equipment-based progressions that build the rotational power and lower body stability your swing depends on.
Common signs your golf swing problems are actually body problems
You don’t need to be in pain for a physical limitation to be costing you strokes. Many golfers play for years with restrictions that quietly erode distance, consistency, and eventually cause injury. Watch for these signs:
- Loss of distance or accuracy without any obvious change in your swing or equipment.
- Back or hip discomfort during or after a round, especially if it's worse on one side.
- Difficulty finishing in balance, or a swing that falls apart as the round goes on.
- Persistent tightness that stretching alone never seems to fully resolve.
- A bent lead arm or early stand-up that instruction hasn't fixed for a while.
- Inconsistent contact that gets noticeably worse as fatigue sets in.
The good news: most of these issues are very addressable once you identify what’s actually driving them. That’s where a physical assessment changes everything.
Golf physical therapy vs. swing instruction … and why you may need both
Swing instruction works best when your body can actually execute what’s being asked of it. When a physical restriction is driving the fault, no amount of mechanical coaching produces a lasting fix — the body just finds another compensation. You’ve probably experienced this: the lesson helps for a round or two, and then the old pattern comes back.
A PT with golf-specific training can assess you from the ground up: joint and soft tissue freedom at every mobility center, core and lower body strength, posture, and movement quality. At Therapeutic Associates, we work with golfers at every level, from weekend players managing back pain to competitive amateurs chasing distance.
A TPI physical assessment gives us a precise picture of which physical limitations are driving which swing faults, and lets us build a program targeted to your unique body. The swing your coach is asking for is usually possible. Your body just needs to catch up.
Ready to Elevate Your Golf Game?
If you’ve been working on your swing and not seeing lasting results, the answer might not be more lessons — it might be in how your body moves. A physical therapist can identify what’s actually holding you back and build a plan that makes the fixes stick.
