The aim of this study is to evaluate surgery performed due to acute Achilles tendon rupture in the light of the subjective and objective data obtained from isokinetic muscle strength measurements. The study included 25 patients with acute achilles tendon rupture. The surgical outcomes were evaluated with the AOFAS foot and hindfoot evaluation score, and the data obtained with the Cybex isokinetic dynamometer. The mean AOFAS foot and hindfoot evaluation score was 98.4 ± 3.7. In the scoring system developed by Thermann et al., the mean value was 89.2 ± 6.8. Accordingly, 13 (52%) of the patients had excellent, 11 (44%) good and 1 (4%) moderate results. In the subjective evaluation, 21 (84%) of the cases were evaluated as excellent, 3 (12%) as good and 1 (4%) as fair. Calf circumference was measured as mean 38.8 ± 3.7 cm on the operated side and 39.8 ± 3.4 cm on the contralateral side, and the difference was not considered statistically significant (p˃0.05). In the measurements made with the isokinetic dynamometer, no significant difference was determined between the healthy and operated sides in respect of the 30°/sec plantar flexion-dorsiflexion peak torque, 120°/sec plantar flexion peak torque and total work measurements (p >0.05). The 120°/sec dorsiflexion peak torque value was found to be statistically significantly higher in the operated ankle (p˂0.05). Although there is no consensus about the treatment protocol for achilles tendon ruptures to be selected, considering the patient profile, methods that allow early active movement, shorten the immobilization period, minimize the loss of work force, and increase patient satisfaction with a low complication rate should be chosen. In this respect, open surgical procedures can be considered the most suitable treatment method for achilles tendon ruptures.