Video 1

Movie S1. Compaction of muscle strip. Time-lapse visualization of fibrin gel compaction during the first 12 h following cell seeding. Seeding conditions included: 138-mJ cm−2 energy dose, 5 × 106 cells ml−1, 4 mg ml−1 fibrinogen, 1 mg ml−1 ACA, and 50 ng ml−1 IGF-1.