Affiliations: [a] Department of Physiology, Faculty of Medicine, University of Cukurova, Adana, Turkey | [b] Faculty of Sports Sciences, University of Cukurova, Adana, Turkey
Correspondence:
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Corresponding author: Kerem Özgünen, Department of Physiology, Faculty of Medicine, University of Cukurova, Adana, 01330, Turkey. Tel.: +322 3387001; Fax: +322 3387370; E-mail: kozgunen@gmail.com.
Abstract: BACKGROUND: Sprint drills are part of the soccer training routine for their resemblance to match activities. There is a lack of information in the literature about the changes in isokinetic skeletal muscle strength in response to sprint training. OBJECTIVE: This study evaluates the effects of eight weeks, on-season repeated sprint training with a change of direction on isokinetic strength parameters in well-trained youth soccer players. METHODS: Nineteen well-trained youth soccer players volunteered to participate in the study. The training program included three sets of six, 40 m (20 + 20 m) shuttle sprints twice a week for eight weeks. Isokinetic peak moment, work, and power of knee extensors and flexors were measured at angular velocities of 60, 180 and 240∘/s. Pre- and post-training valid isokinetic sector data were compared. RESULTS: Following the training period, dominant and non-dominant legs’ peak moment, work, and power values for both extensor and flexor muscle groups improved significantly at various angular velocities. CONCLUSIONS: Isokinetic strength enhancement may be explained with the induction of muscle hypertrophy following a prolonged period of sprint training.
