Upper back (Thoracic spine)
Turning into a backhand feels tighter than a forehand, or upper back stiffness after long baseline rallies.
An evaluation looks at Thoracic rotation in both directions and thoracic extension during overhead motion.
Interactive · educational
See what rotational strokes ask of your body.
Rotate the 3D model, step through the four stroke phases, and mark where your own body feels restricted. Produces a tailored summary to bring to an evaluation.
Educational only. This is not a diagnosis, not a stroke lesson, and not a claim about how you will play.
Not a diagnosis
This tool does not diagnose conditions or prescribe treatments. It explores physical stroke mechanics.
Not tennis coaching
Technique, grip, and tactics belong to your tennis professional. Dr. Bob assesses joint mobility and physical range.
Private & in-browser
Nothing you click is saved or sent anywhere. You can copy your reflection for your records.
The model
Four positions, five areas of the body.
Every stroke in tennis starts as trunk rotation and finishes as reach. The groundstroke coils the torso over a loaded rear hip; the forward drive unwinds through the core; and the follow-through decelerates the racquet across the body. This model highlights where that movement happens.
Ready position
Balanced athletic base behind the baseline, knees flexed, racquet cradled in both hands in front of the chest, ready to move in any direction.
Asks for balanced ankle stability, neutral lumbar posture, and symmetrical hip mobility.
Unit turn
The shoulders and trunk turn together as a single unit, loading the rear hip while the non-dominant hand guides the racquet back.
Asks for thoracic spine rotation, rear hip external rotation, and shoulder horizontal abduction.
Contact point
Hips and core rotate forward into the ball, transferring weight from the back foot through the front foot as the racquet meets the ball at waist level.
Asks for dynamic hip rotation, lumbar stability under rotational force, and shoulder blade control.
Follow-through
The racquet decelerates over the lead shoulder, the chest faces the net, and the rear foot pivots up onto the toe in full extension.
Asks for shoulder posterior capsule range, upper-back rotation through the finish, and single-leg landing balance.
Where does your stroke or court movement feel restricted?
Tap any area on the model or use the list. There is no right number to mark.
A few questions about how it feels.
Four quick questions. There are no right answers and nothing is scored.
Your reflection
Nothing marked yet.
Nothing marked yet. Select an area on the 3D model or answer a question above to generate your reflection.
Without JavaScript this summary is not assembled, but everything it would say is on this page already: each area above explains what it does during a stroke, and what an in-person evaluation looks at.
Educational tool only. This reflection is not a medical diagnosis, not a screening result, and not tennis coaching. Processed entirely in your browser.
In person
What an evaluation actually looks at.
Nothing on this page is a finding. These are the things Dr. Bob measures and observes during an individual appointment.
Shoulders & hitting arm
Aching in the shoulder on serves, or feeling limited reaching across for a follow-through.
An evaluation looks at Shoulder external/internal rotation, horizontal adduction, and scapular upward rotation.
Hips & pelvis
Difficulty loading into the rear hip on wide balls, or groin tightness after three sets.
An evaluation looks at Hip internal/external rotation, hip extension, and open-stance lateral stability.
Lower back (Lumbar spine)
Lower back aching after serving or after playing on hard courts.
An evaluation looks at Lumbar segmental mobility, extension tolerance, and core stabilization under rotational load.
Balance & footwork
Feeling unsteady stopping on wide balls or difficulty pushing off back toward the center.
An evaluation looks at Ankle dorsiflexion, Achilles elasticity, and single-leg deceleration control.
Questions people ask
Straight answers.
Will this improve my serve speed or ranking?
No. Dr. Bob does not coach tennis and does not promise athletic outcomes. A movement evaluation assesses physical range of motion and joint restrictions.
Why does my shoulder ache after serving?
Serving involves rapid overhead rotation. If the thoracic spine does not extend and rotate adequately, the shoulder joint is forced to absorb excessive strain.
What happens during a tennis movement evaluation?
Dr. Bob assesses thoracic spine rotation, shoulder range of motion, hip rotation, and ankle mobility, explaining findings in practical terms.
Tennis Movement
Bring your notes to an evaluation.
An individual evaluation assesses spinal rotation, shoulder joint motion, and hip mobility to understand how your body handles court demands.