Several studies have shown the positive effect that caffeine has on athletic performance related variables. Nonetheless, most studies have been developed in males and have not studied the possible effects on biomechanics and related injuries. Moreover, the inclusion of personalized insoles could also affect biomechanical patterns and thus injury incidence that has shown to be higher when athletes are fatigued. Therefore, the aim of the present randomized controlled trial is to evaluate the effect of fatigue, caffeine supplementation and personalized insoles on biomechanics and athletic performance in female adult soccer players.
Study Type
INTERVENTIONAL
Allocation
RANDOMIZED
Purpose
DIAGNOSTIC
Masking
DOUBLE
Enrollment
16
Participants will wear standard insoles and ingest caffeine in liquid form (3mg/kg) with carbohydrates.
Participants will wear personalized insoles and ingest a drink of carbohydrates without caffeine
Participants will wear standard insoles and ingest a drink of carbohydrates without caffeine
Universidad de Zaragoza
Zaragoza, Spain
Agility after fatigue and caffeine supplementation
Assessment of agility in seconds before and after a fatigue protocol is applied. Data will be collected with photoelectric cells.
Time frame: One day
Jump height after fatigue and caffeine supplementation
Assessment of jump height in centimetres before and after a fatigue protocol is applied. Data will be collected with force plates.
Time frame: One day
Repeated sprint ability after fatigue and caffeine supplementation
Assessment of repeated sprints ability in seconds before and after a fatigue protocol is applied. Data will be collected with photoelectric cells.
Time frame: One day
Agility after fatigue and personalized insoles
Assessment of agility in seconds before and after a fatigue protocol is applied. Data will be collected with photoelectric cells.
Time frame: One day
Jump height after fatigue and personalized insoles
Assessment of jump height in centimetres before and after a fatigue protocol is applied. Data will be collected with force plates.
Time frame: One day
Repeated sprint ability after fatigue and personalized insoles
Assessment of repeated sprints ability in seconds before and after a fatigue protocol is applied. Data will be collected with photoelectric cells.
Time frame: One day
Agility after fatigue and placebo
Assessment of agility in seconds before and after a fatigue protocol is applied. Data will be collected with photoelectric cells.
Time frame: One day
Jump height after fatigue and placebo
Assessment of jump height in centimetres before and after a fatigue protocol is applied. Data will be collected with force plates.
Time frame: One day
Repeated sprint ability after fatigue and placebo
Assessment of repeated sprints ability in seconds before and after a fatigue protocol is applied. Data will be collected with photoelectric cells.
Time frame: One day
Hip range of motion after fatigue and caffeine supplementation
Assessment of hip range of motion in degrees assessed with VICON before and after a fatigue protocol is applied. Data will be collected with the VICON motion capture system.
Time frame: During the intervention
Knee range of motion after fatigue and caffeine supplementation
Assessment of knee range of motion in degrees assessed with VICON before and after a fatigue protocol is applied. Data will be collected with the VICON motion capture system.
Time frame: During the intervention
Ankle range of motion after fatigue and caffeine supplementation
Assessment of ankle range of motion in degrees assessed with VICON before and after a fatigue protocol is applied. Data will be collected with the VICON motion capture system.
Time frame: During the intervention
Hip flexion moment after fatigue and caffeine supplementation
Assessment of hip flexion moment in Nm·kg assessed with VICON before and after a fatigue protocol is applied. Data will be collected with the VICON motion capture system.
Time frame: During the intervention
Knee flexion moment after fatigue and caffeine supplementation
Assessment of knee flexion moment in Nm·kg assessed with VICON before and after a fatigue protocol is applied. Data will be collected with the VICON motion capture system.
Time frame: During the intervention
Ankle flexion moment after fatigue and caffeine supplementation
Assessment of ankle flexion moment in Nm·kg assessed with VICON before and after a fatigue protocol is applied. Data will be collected with the VICON motion capture system.
Time frame: During the intervention
Hip range of motion after fatigue and personalized insoles
Assessment of hip range of motion in degrees assessed with VICON before and after a fatigue protocol is applied. Data will be collected with the VICON motion capture system.
Time frame: During the intervention
Knee range of motion after fatigue and personalized insoles
Assessment of knee range of motion in degrees assessed with VICON before and after a fatigue protocol is applied. Data will be collected with the VICON motion capture system.
Time frame: During the intervention
Ankle range of motion after fatigue and personalized insoles
Assessment of ankle range of motion in degrees assessed with VICON before and after a fatigue protocol is applied. Data will be collected with the VICON motion capture system.
Time frame: During the intervention
Hip flexion moment after fatigue and personalized insoles
Assessment of hip flexion moment in Nm·kg assessed with VICON before and after a fatigue protocol is applied. Data will be collected with the VICON motion capture system.
Time frame: During the intervention
Knee flexion moment after fatigue and personalized insoles
Assessment of knee flexion moment in Nm·kg assessed with VICON before and after a fatigue protocol is applied. Data will be collected with the VICON motion capture system.
Time frame: During the intervention
Ankle flexion moment after fatigue and personalized insoles
Assessment of ankle flexion moment in Nm·kg assessed with VICON before and after a fatigue protocol is applied. Data will be collected with the VICON motion capture system.
Time frame: During the intervention
Hip range of motion after fatigue and placebo
Assessment of hip range of motion in degrees assessed with VICON before and after a fatigue protocol is applied. Data will be collected with the VICON motion capture system.
Time frame: During the intervention
Knee range of motion after fatigue and placebo
Assessment of knee range of motion in degrees assessed with VICON before and after a fatigue protocol is applied. Data will be collected with the VICON motion capture system.
Time frame: During the intervention
Ankle range of motion after fatigue and placebo
Assessment of ankle range of motion in degrees assessed with VICON before and after a fatigue protocol is applied. Data will be collected with the VICON motion capture system.
Time frame: During the intervention
Hip flexion moment after fatigue and placebo
Assessment of hip flexion moment in Nm·kg assessed with VICON before and after a fatigue protocol is applied. Data will be collected with the VICON motion capture system.
Time frame: During the intervention
Knee flexion moment after fatigue and placebo
Assessment of knee flexion moment in Nm·kg assessed with VICON before and after a fatigue protocol is applied. Data will be collected with the VICON motion capture system.
Time frame: During the intervention
Ankle flexion moment after fatigue and placebo
Assessment of ankle flexion moment in Nm·kg assessed with VICON before and after a fatigue protocol is applied. Data will be collected with the VICON motion capture system.
Time frame: During the intervention
Injury incidence
Association between the primary outcomes and injury incidence registered through the International Federation of Association Football questionnaire (F-MARC)
Time frame: Six months
Sleep disturbances after caffeine ingestion
Rate of patients with sleep problems assessed with the Athens sleep questionnaire
Time frame: Immediately after the intervention
Sleep disturbances after personalized insoles
Rate of patients with sleep problems assessed with the Athens sleep questionnaire
Time frame: Immediately after the intervention
Sleep disturbances after placebo
Rate of patients with sleep problems assessed with the Athens sleep questionnaire
Time frame: Immediately after the intervention
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