Morning (SIT) led to greater improvements in performance metrics among collegiate soccer players.
Both morning and evening SIT groups showed significant enhancements in physical and physiological performance after 7 weeks.
Improvements were measured using physical tests such as the vertical jump, 20-m sprint, and Yo-Yo intermittent recovery test.
The morning SIT group had greater adaptive changes compared to the evening group in jump height, sprint speed, and power outputs.
Statistical significance was noted for the differences in performance between the morning and evening training sessions (p < 0.05).
Scheduling SIT in the morning may optimize physical performance adaptations for soccer athletes.
Simplified
While the literature provides evidence supporting the effectiveness of evening (SIT), there remains a limited amount of research investigating the effects of morning SIT among soccer athletes. This study examined the effects of morning versus evening SIT during the preparatory phase on physical and physiological performance in collegiate soccer players. Thirty male players volunteered to participate in the study and were randomly divided into morning, evening, or control groups, each group consisting of 10 subjects. The evaluation of physical ( [CMVJ], 20-m sprint, Illinois change of direction, and Yo-Yo intermittent recovery test level 1 [Yo-Yo IR1]) and physiological (graded exercise test and Wingate anaerobic power test) performance took place prior to and following the 7-week SIT, both in the morning and evening testing sessions. Both training groups showed significant improvements in physical and physiological performance from pre- to post-training, regardless of testing session timing (p < 0.05). The morning SIT group exhibited greater adaptive changes (p < 0.05) compared to the evening SIT group in CMVJ, 20-m sprint, Yo-Yo IR1, peak and mean power outputs at both the morning and evening testing sessions. These findings suggest that male soccer players can benefit from both morning and evening SIT sessions; however, conducting SIT in the morning could result in greater adaptive changes than evening training. To optimize physical performance adaptations, coaches should schedule SIT sessions in the morning. It is recommended to schedule conditioning workouts in the morning and team practices in the afternoon for optimal adaptations.
Key numbers
10.5%
Improvement (Moderate)
Change from pre to post-training for morning group.
-6.5%
20-m Sprint Improvement (Moderate)
Change from pre to post-training for morning group.
N/A
Yo-Yo IR1 Improvement (Very Large)
Comparison of improvements in Yo-Yo IR1 between morning and evening groups.
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