Patient name
A.H.
OSSO Case Study · Sports Rehabilitation
A Grade 1 ACL sprain, returned to sport without surgery
A.H. arrived at OSSO after a run of conflicting opinions about his knee - some pointing toward surgery, none giving him a clear path. He was taken through the OSSO ACL Grade 1 protocol instead. Six to eight months later he is back on the field in three sports.
- Months of treatment
- 6–8
- Surgeries required
- 0
- Protocol phases run
- 2B–4
- Sports resumed
- 3
Patient and presentation
Age at intake
99Placeholder
Occupation
Profession - placeholderPlaceholder
Condition
Grade 1 anterior cruciate ligament sprain
The Full Journey
Patient and presentation
- Problem treated
- ACL sprain - knee instability and loss of confidence under load
- Prior recommendation
- Mixed opinions from earlier consultations, with no clear direction on whether to operate or rehabilitate
- How he found OSSO
- Referred by friends
The OSSO protocol
A.H. was placed on the OSSO ACL Grade 1 pathway and progressed through three consecutive phases. Each phase had to be cleared on criteria before the next began - the timeline followed his knee, not a calendar.
Phase 2B - Load tolerance and control
Isometric loading and targeted muscle activation to rebuild the quadriceps and hamstrings, and to restore tolerance to single-leg work.
Phase 3 - Strength and agility
Progressive strengthening across quadriceps, hamstrings and glutes, alongside balance and proprioceptive work and ladder-based agility drills.
Phase 4 - Return to sport
Plyometric progression and landing mechanics, then sport-specific training built around the demands of the sports he intended to return to.
Before treatment vs. end of protocol
At intake
- Quadriceps & hamstring strength
- Reduced
- Single-leg loading
- Reduced tolerance
- Balance & proprioception
- Impaired
- Agility & landing mechanics
- Absent
- Pain / swelling
- Placeholder - intake pain/swellingPlaceholder
End of protocol
- Quadriceps & hamstring strength
- Substantially improved, with gluteal strength restored alongside
- Single-leg loading
- Tolerated through full rehabilitation and sporting load
- Balance & proprioception
- Restored, with improved neuromuscular control
- Agility & landing mechanics
- Competent agility and controlled landing mechanics
- Pain / swelling
- Placeholder - final pain/swellingPlaceholder
Treatments Used
Treating physiotherapist
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