bike sprint, MRI

Did my first training involving legs since last Saturday's running.  Just a neighborhood bike sprint.   Got the knee MRI.  Definitely a mess.  

2.5 mile mountain bike sprint - Laurel Branch Trl

Time - 10:01

Avg speed - 13.6 mph

Max HR - 173

HR over 156 - 5:05

HR over 170 - 5:18 

Avg HR - 166 (inc 1 min recovery at end)

Slower and higher avg HR but lower Max HR from last time.

Knee continues to feel better and will allow recovery til I do make any running attempts.  

As expected, MRI showed a lot of problems.  It seems that the game should be to expect trauma and to allow recovery.  

On the plus side:

"Intact root attachment.... prior repair of vertical tear in the posterior horn which remains intact. Intact anterior root"

On the minus side:

"recurrent macerated tearing along the free edge of the posterior horn/root junction creating a small free edge flap with intact posterior root. Degenerative undersurface tearing of the meniscus at the posterior junction and partially extruded body segment without flap displacement ...  Prior repair of vertical tear in the posterior horn which remains intact. Intact anterior root with reactive edema or root sprain. Diffuse chondral loss throughout the central and posterior weightbearing femoral condyle at least 75% chondral thickness with stress related marrow changes diffusely throughout the femoral condyle associated within

evolving subchondral fracture in the posterior weightbearing aspect measuring 0.7 cm transversely with evidence of remotely healed subchondral fracture in the more anterior weightbearing femoral condyle. Partial chondral loss in the tibial plateau centrally at least 50% chondral thickness with mild stress response peripherally and posteriorly... Full thickness chondral loss in the central, with highgrade partial chondral loss in the inferior medial trochlea with chronic stress response and preserved cartilage in the lateral trochlear facet."

Summary impression:

1. Prior medial meniscal repair posteriorly with recurrent free edge tearing of the posterior horn/root junction, undersurface tearing of the peripheral posterior horn extending to the body segment with intact root attachments demonstrating degeneration/sprain and progressive arthrosis in the compartment at least moderate severity with increased stress response throughout the femoral condyle associated with a evolving subchondral stress or insufficiency fracture of the posterior weightbearing aspect, likely a pain generator.

2. Intact lateral meniscus with degenerative fraying along the free edge and relatively superficial focal chondral loss without significant compartment arthrosis.

3. Intact cruciate, collateral ligaments without acute injury or tear, early mucinous degeneration of the ACL.

4. Patellofemoral arthrosis, moderate severity with chronic stress response related to highgrade chondral loss in the trochlea.

5. Moderate size joint effusion with chronic synovitis more pronounced suprapatellar fossa, medial compartment. Small loose osseous bodies in the posterior superior medial femoral recess measuring up to 0.5 cm.

Seems that the worst cartilage loss is not on the tibial or condyle surfaces, but behind the kneecap on the medial trochlea.   Anyway, it sucks.