Objective: This study aimed to compare and evaluate the efficacy of eccentric and concentric training on quadriceps femoris muscle architecture, muscle strength and proprio- ception in healthy young people. Materials and Methods: Sixty healthy subjects were divided into two groups concentric training (n=30), and eccentric training (n=30). The outcome measurements were Quadriceps Femoris (QF) muscle architecture, mus- cle strength and knee proprioception. The training was carried out on the subjects’ dominant side leg (right), and the participants were trained three times a week for 12 weeks. The measurements were applied before and after training. QF muscle architecture was assessed by using ultrasonography. Isokinetic muscle strength and knee proprioception were assessed with the isokinetic dyna- mometer. Results: The results showed a significant increase in QF architecture, muscle strength and knee proprioception after the training in the two groups (p<0.05). When we compared the training groups, there were no differences regarding the outcome of all variables between groups (p>0.05). Conclusion: Training techniques, including eccentric and concentric training, positively affected QF muscle archi- tecture, muscle strength, and knee proprioception (p<0.05), but there is no superiority between each other (p>0.05).