Recovery Kinetics Following Change of Direction Training

NCT ID: NCT04795232

Last Updated: 2023-10-10

Basic Information

• Recruitment Status: COMPLETED
• Clinical Phase: NA
• Total Enrollment: 10 participants
• Study Classification: INTERVENTIONAL
• Study Start Date: 2021-04-01
• Study Completion Date: 2023-06-30

Brief Summary

This study aims at investigating the recovery kinetics of skeletal muscle damage, neuromuscular fatigue and performance following a single change of direction (COD) training session in competitive soccer players. The impact of COD degrees will be also examined by comparing a 45o vs. 90o COD training session. Ten male soccer players will perform a COD45 [A single training session including 2x(10x ~27.6m) sprints with two 45o COD in each sprint], a COD90 [A single training session including 2x(10x ~21.2m) sprints with two 90o COD in each sprint] and a Control trial (No intervention included, only daily measurements) in randomized, repeated measures, crossover design. Assessments related to skeletal muscle damage, neuromuscular fatigue and performance will be performed prior to training session and daily for three consecutive days post-training, in each trial.

Detailed Description

Ten male soccer players will be included in this study. Participants will be initially informed about the aim of study as well as the associated risks and benefits and subsequently will provide their signed consent form. At baseline, they will undergo assessment of their anthropometrics (i.e. body mass and body height), body composition (by DXA), physical conditioning status [maximal oxygen consumption (VO2max), Yo-Yo Intermittent Endurance test level 2 and Yo-Yo Intermittent Recovery test level 2] and daily dietary intake. Thereafter, they will participate in two experimental trials and one control trial in a randomized, crossover, repeated measures design: i) COD45: Participants in this trial will perform a COD training session consisted of 2 sets of 10 x ~27.6m sprints with two 45o COD in each sprint and a resting period of 16 sec and 2:20 min between sprints and sets, respectively, ii) COD90: Participants in this trial will perform a COD training session consisted of 2 sets of 10 x ~21.2m sprints with two 90o COD in each sprint and a resting period of 16 sec and 2:20 min between sprints and sets, respectively, iii) Control: Participants in this trial will only participate in daily assessments to control for day to day variability in the depended variables (they will not receive any intervention). Prior to each trial, participants will provide a resting blood sample (for the determination of blood lactate, white blood cell count and creatine kinase activity) and undergo assessment of their delayed onset of muscle soreness (DOMS), maximal voluntary isometric contraction (MVIC), countermovement jump [will be assessed using two force platforms at 1000 Hz and electromyography instrumentation (EMG)], isokinetic peak torque of knee extensors and flexors (will be assessed on an isokinetic dynamometer), agility (will be assessed using the Illinois test), 10m and 30m sprint time (will be assessed by using light cells) and repeated sprint ability (5x30m sprints will be performed with 25 sec rest in-between). In COD45 and COD90 experimental trials, a blood sample will be collected immediately post-training for the determination of blood lactate concentration while assessment of DOMS, MVIC and countermovement jump will be performed at 1, 2 and 3 hours post-training. In all trials assessment of DOMS, MVIC, countermovement jump (CMJ), isokinetic peak torque, agility and sprinting performance as well as determination of creatine kinase activity and white blood cell count will be performed at 24, 48 and 72 hours post-training. A 7-day wash out period will applied between trials.

Conditions

Skeletal Muscle Damage

Study Design

• Allocation Method: RANDOMIZED
• Intervention Model: CROSSOVER
• Primary Study Purpose: OTHER
• Blinding Strategy: NONE

Study Groups

Control

Participants in this arm will receive no intervention

Group Type: NO_INTERVENTION

No interventions assigned to this group

COD45

Participants in this arm will participate in a COD training session consisted of 45 degrees changes of direction

Group Type: EXPERIMENTAL

COD45

Intervention Type: OTHER

Participants will perform 2 sets of 10 sprints. The total distance for each sprint will be 27.6 meters and will include two changes of direction of 45 degrees. The recovery time will be 16 seconds between sprints and 2.20 minutes between sets

COD90

Participants in this arm will participate in a COD training session consisted of 90 degrees changes of direction

Group Type: EXPERIMENTAL

COD90

Intervention Type: OTHER

Participants will perform 2 sets of 10 sprints. The total distance for each sprint will be 21.2 meters and will include two changes of direction of 90 degrees. The recovery time will be 16 seconds between sprints and 2.20 minutes between sets

Interventions

COD45

Participants will perform 2 sets of 10 sprints. The total distance for each sprint will be 27.6 meters and will include two changes of direction of 45 degrees. The recovery time will be 16 seconds between sprints and 2.20 minutes between sets

Intervention Type: OTHER

COD90

Participants will perform 2 sets of 10 sprints. The total distance for each sprint will be 21.2 meters and will include two changes of direction of 90 degrees. The recovery time will be 16 seconds between sprints and 2.20 minutes between sets

Intervention Type: OTHER

Eligibility Criteria

Inclusion Criteria

• Soccer players participating in at least 5 training sessions per week and 1official match
• Participation at a competitive level for at least 4 years
• Free of musculoskeletal injuries
• No use of ergogenic supplements or medication
• Non-smokers

Exclusion Criteria

• Musculoskeletal injury
• Use of alcohol, caffeine and any type of ergogenic supplements or medication during the course of the study

• Minimum Eligible Age: 18 Years
• Maximum Eligible Age: 35 Years
• Eligible Sex: MALE
• Accepts Healthy Volunteers: Yes

Sponsors

University of Thessaly

OTHER

Sponsor Role: lead

Responsible Party

Ioannis G. Fatouros

Professor

Responsibility Role: PRINCIPAL_INVESTIGATOR

Principal Investigators

Ioannis G Fatouros, Prof

Role: STUDY_DIRECTOR

University of Thessaly, Department of Physical Education and Sport Science

Locations

SMART LAB, Department of Physical Education and Sports Science, University of Thessaly.

Trikala, , Greece

SmArT LABORATORY, SCHOOL OF PHYSICAL EDUCATION & SPORTS SCIENCES, UNIVERSITY OF THESSALY

Trikala, , Greece

Countries

Greece

Other Identifiers

Recovery-COD Training-UTH

Identifier Type: -

Identifier Source: org_study_id