Second Edition · Chapter 3 Assessment · Original Test 4.23
Assesses lower-body control over a planted leg during repeated single-leg squats.
Test Demonstration
Watch the movement, then follow the book’s full procedure and measurement instructions for a formal assessment.
Equipment
Open floor space and an observer who can note movement compensations.
Test Procedure
Perform ten single-leg squats to approximately 45° while keeping the arms at the sides. Observe knee tracking, pelvic level and torso position as the repetitions continue.
Result And Scoring
Record inward knee motion, opposite hip drop, trunk position and loss of balance across ten repetitions to 45 degrees knee flexion. Compare both sides under the same depth and pace. Knee movement beyond the toes is an observation, not an automatic failure. These movement findings do not by themselves diagnose weak hip abductors, tight hamstrings or gluteal restrictions; assess strength and available motion separately before selecting corrective work.
Video Demonstration Note
The video shows single-leg squat repetitions with the arms reaching forward. The book specifies arms at the sides, so this is a modified demonstration and must not be scored as an exact protocol.
Training Connections
The book recommends targeted hip-abduction work, Romanian Deadlift and Supine Knee to Chest according to observed deficits. Return to the assessment overview for related demonstrations.
From The Tennis Book
4.23 Single Leg Stability Test in Advanced Concepts of Strength & Conditioning for Tennis. Use the book’s full protocol when recording a test result.