Open Chain Knee Extension can be used safely from 12 weeks post op – and likely earlier.
Earlier use of Open Chain Knee Extension can be considered if clinically indicated, with the following restrictions:
- Restricted ROM (45 – 90 degrees)
- Isometrics at 60 degrees and 90 degrees
Evidence has shown
- no increased ACL laxity with the introduction of Open Chain Knee Extension at 6 weeks.
- no increased ACL laxity with using full range Open Chain Knee Extension at 12 weeks
Open Chain Knee Extension exercises are recommended in multiple ACL Reconstruction rehabilitation guidelines
- Janssen, van Melick, van Mourik, Reijman, & van Rhijn, 2018
- van Melick et al., 2016
- Wright et al., 2015
Summary
- Consider starting supervised Open Chain Knee Extensions between 45-90 degrees from 6 weeks
- Consider starting full range Open Chain Knee Extensions from 12 weeks