The Single Leg Drop Jump (SLDJ) test is a popular test for assessing muscle stretch-shortening capacity, readiness and coordination, as well as unilateral balance and stability. The protocol for SLDJ tests is identical to the Drop Jump (DJ) test, except it is performed on one leg at a time.
ForceDecks App Protocol
Standing on box or elevated platform, immediately behind force plates
Normal standing posture
Hands on hips
Chest up and looking forward
Zero plates – Ensure nothing is touching plates and click "Zero Platforms".
Step on plates – Ask individual to step on the plates.
Weigh individual – Click “Measure Weight”. The individual must remain completely still, and the colour display must register green before accepting body weight.
Assume starting position – Ask individual to assume starting position.
Start Recording – Click "Start Recording”.
Perform jump - Instruct the individual to:
Keep chest up and looking forward;
Step off the box; then
Land on the plates with one foot; then
Immediately jump as high as possible; then
Land softly on the same foot, remaining completely still on the plates for 2-3 seconds; then
Assume the starting position again.
Repeat jump – Repeat steps 4 and 6 to record a total of 3 drop jumps.
Stop recording – Click "Stop Recording".
Review – Review that reps and test type have been detected correctly. You can manually correct the test type and/or manually mark trial ranges, if required.
Analyse – Click "Analyse and Save" - to move directly to next individual; or Click "Analyse" – to review results.