At postoperative day 25 after an uncomplicated anterior cruciate ligament (ACL) reconstruction, how long should I keep the brace on each day and how often should I perform strengthening and rehabilitation exercises?

ACL Reconstruction Rehabilitation at Day 25 Post-Op

At postoperative day 25, you should discontinue routine brace use (or use only per patient preference), perform strengthening exercises daily with supervised sessions 2-3 times per week, and focus on closed kinetic chain exercises with progressive quadriceps activation—open kinetic chain exercises (90-45°) can be safely initiated at week 4 (day 28). 1

Brace Use at Day 25

Postoperative functional bracing should NOT be routinely used after ACL reconstruction. Multiple high-quality guidelines consistently recommend against routine postoperative knee bracing, as it provides no advantages in terms of stability, range of motion, or functional outcomes 1. The only exceptions are:

• Patient preference for comfort
• Concomitant ligament injuries requiring additional protection

If a brace was prescribed by your surgeon for specific reasons, this should be clarified, but standard practice at day 25 is to be brace-free or weaning off completely.

Exercise Frequency and Duration

Supervised vs. Home-Based Exercise

You should be performing exercises daily, with supervised physical therapy sessions 2-3 times per week 2, 3. The evidence shows:

• Supervised rehabilitation is more effective than unsupervised rehabilitation for optimal outcomes 2
• However, minimally supervised programs can work for highly motivated patients who live far from physical therapists 1
• Daily home exercise programs are essential between supervised sessions 4

Exercise Types at Week 3-4 (Days 21-28)

At your current timepoint (day 25), the 2023 Aspetar guideline—the most recent and comprehensive ACL rehabilitation guideline—provides specific recommendations 5:

Closed Kinetic Chain Exercises (Priority):

• Should be prioritized in the first postoperative month 1
• Leg press can be started at 3 weeks and improves subjective knee function and functional outcomes 5
• Includes: squats (0-45°), step-ups, leg press, wall sits
• These reduce patellofemoral pain risk compared to open kinetic chain exercises 5, 1

Open Kinetic Chain Exercises:

• Can be safely initiated at 4 weeks (90-45° range only) 1
• You are approaching this timeframe (day 28 = 4 weeks)
• Important caveat: If you have a hamstring graft, avoid adding extra weight to open kinetic chain exercises until 12 weeks 1
• No evidence supports starting earlier than week 4 5

Isometric and Eccentric Exercises:

• Isometric quadriceps exercises (straight leg raises, static quadriceps contractions) are safe and beneficial throughout the first 2 weeks and beyond 5
• Starting eccentric exercises at 3 weeks (vs. 12 weeks) results in greater strength gains, better daily activity, and greater quadriceps hypertrophy at 1 year 5
• Eccentric cycle ergometer training can be initiated at 3 weeks with significant long-term benefits 5

Neuromuscular Training:

• Should be combined with strength training from the first postoperative week 1
• Includes proprioception, balance training, and neuromuscular re-education 6

Specific Exercise Dosage Recommendations

While guidelines show variability in exact dosing 3, 7, the general framework at day 25 should include:

Daily Activities:

• Range of motion exercises (goal: full extension by 2-4 weeks, progressive flexion) 8
• Isometric quadriceps contractions
• Straight leg raises
• Ankle pumps and circulation exercises
• Patellar mobilizations 8
• Home exercise program (30-45 minutes)

Supervised Sessions (2-3x/week):

• Progressive closed kinetic chain strengthening
• Neuromuscular/proprioceptive training
• Gait re-education if needed 9
• Manual therapy as indicated 10

Adjunctive Modalities at Day 25

Neuromuscular Electrical Stimulation (NMES):

• Should be used for the initial 6-8 postoperative weeks 1
• Effective when combined with isometric strengthening 1
• Helps re-educate voluntary quadriceps contraction 1

Cryotherapy:

• May still be used at day 25 for pain and swelling control 1, 6
• Most beneficial in the first postoperative week but can continue as needed 2

Weight-Bearing Status

You should be fully weight-bearing as tolerated by day 25 1. Immediate full weight-bearing is recommended following ACL reconstruction and does not compromise stability 5, 9.

Critical Timeframe Context

At day 25, you are in the early strengthening phase (weeks 3-6). The rehabilitation focus should be:

1. Achieving full knee extension (should be complete by week 4) 8
2. Progressive knee flexion (goal: 90° by week 6) 5
3. Quadriceps activation and strengthening (critical for long-term outcomes)
4. Reducing swelling and inflammation 9
5. Normalizing gait pattern 9

Common Pitfalls to Avoid

• Do not rush open kinetic chain exercises before week 4 5
• Do not add resistance to open kinetic chain if you have hamstring graft until 12 weeks 1
• Do not rely solely on time-based progression—functional criteria matter 6
• Do not neglect neuromuscular training in favor of strength alone 1
• Monitor for anterior knee pain when progressing exercises 5

Expected Total Rehabilitation Duration

Rehabilitation should last at least 9 months 6, with most protocols extending 9-12 months before unrestricted return to sport 3, 8. Supervised physical therapy typically lasts 5 months or less, but this varies 3.