Chronic Effects of the Use of Instep Weights on Specific Capacities in Soccer Players
NCT ID: NCT06723587
Last Updated: 2025-06-06
Study Results
The study team has not published outcome measurements, participant flow, or safety data for this trial yet. Check back later for updates.
Basic Information
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COMPLETED
NA
42 participants
INTERVENTIONAL
2025-02-17
2025-05-07
Brief Summary
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The secondary objective will be to propose a training methodology using instep weights to enhance athletic performance.
The following hypotheses are formulated based on the objectives outlined previously.
Hypothesis 1: the use of instep weights will enhance performance in ball striking speed, change of direction ability, and repeated sprint capacity.
Hypothesis 2: the use of instep weights will negatively affect performance in ball striking accuracy and ball control.
Hypothesis 3: the use of instep weights will not produce adverse effects on perceived exertion, groin pain or reduce maximal adductor, quadriceps and hamstring muscle contraction values.
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Detailed Description
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Players will attend their regular training sessions and the protocol will be divided into two phases:
* Phase 1: familiarization On the recruitment day, players will be briefed on the study procedures, followed by the reading and signing of informed consent forms. Familiarization with the study procedures will take place over the two weeks prior to the intervention phase. During this period, participants will practice all testing protocols once a week and will wear 100-gram instep weights in different training sessions.
* Phase 2: intervention During the intervention phase, all players who meet the inclusion and exclusion criteria will be recruited and will be randomly allocated into an intervention group (experimental) or a non-intervention group (control group). Randomization will be conducted by an external researcher using blocked randomization via a web-based tool (Urbinak, 1997). Both groups will undergo distinct interventions over an 8-week period.
The study will be conducted during the competitive season on artificial turf field under consistent environmental conditions. Players will wear soccer boots for all testing procedures. Testing will occur at three time points:
* Pre-intervention: first day of Week 1 to collect baseline data.
* Mid-intervention: first day of Week 5.
* Post-intervention: first day of Week 9.
Conditions
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Study Design
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RANDOMIZED
PARALLEL
OTHER
SINGLE
Study Groups
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Instep weights
Instep weight use
Instep weights use
Players will perform their scheduled training sessions while wearing a 150-gram instep weight. The use of instep weights in the intervention group will be introduced progressively and gradually, increasing both the frequency of sessions and the duration of their use.
During weeks 1-2, instep weights will be used in one training session per week. During weeks 3-5, will be used in two training sessions per week.
And during weeks 6-8, will be used in three training sessions per week.
The duration of instep weight usage within each session will increase by 5% weekly, starting at 40% in Week 1 and reaching 75% by Week 8.
No instep weights
No instep weight.
No interventions assigned to this group
Interventions
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Instep weights use
Players will perform their scheduled training sessions while wearing a 150-gram instep weight. The use of instep weights in the intervention group will be introduced progressively and gradually, increasing both the frequency of sessions and the duration of their use.
During weeks 1-2, instep weights will be used in one training session per week. During weeks 3-5, will be used in two training sessions per week.
And during weeks 6-8, will be used in three training sessions per week.
The duration of instep weight usage within each session will increase by 5% weekly, starting at 40% in Week 1 and reaching 75% by Week 8.
Eligibility Criteria
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Inclusion Criteria
* minimum three years of experience playing soccer
* train 3 days/week and 5 hours/week (minimum)
Exclusion Criteria
* Goalkeepers
* Players unable to perform at their best
* Players that will miss more than two training sessions
* Players under medication or using performance enhancement supplements
* Players under 16 years old
16 Years
19 Years
MALE
No
Sponsors
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University of Vic - Central University of Catalonia
OTHER
Responsible Party
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Principal Investigators
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Albert Altarriba-Bartes, PhD
Role: PRINCIPAL_INVESTIGATOR
Lecturer and Researcher
Locations
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University of Vic-Central University of Catalonia
Vic, , Spain
Countries
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References
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Borg GA. Psychophysical bases of perceived exertion. Med Sci Sports Exerc. 1982;14(5):377-81.
Bidaurrazaga, I., Moreira, H., Lekue, J. A., Badiola, A., Figueiredo, A. J., & María, S. (2015). Applicability of an agility test in young players in the soccer field. Revista Brasileira de Medicina do Esporte, 21(2), 133-138.
Aziz AR, Mukherjee S, Chia MY, Teh KC. Validity of the running repeated sprint ability test among playing positions and level of competitiveness in trained soccer players. Int J Sports Med. 2008 Oct;29(10):833-8. doi: 10.1055/s-2008-1038410. Epub 2008 Apr 9.
Esteve E, Rathleff MS, Vicens-Bordas J, Clausen MB, Holmich P, Sala L, Thorborg K. Preseason Adductor Squeeze Strength in 303 Spanish Male Soccer Athletes: A Cross-sectional Study. Orthop J Sports Med. 2018 Jan 11;6(1):2325967117747275. doi: 10.1177/2325967117747275. eCollection 2018 Jan.
Alshahrani MS, Reddy RS. Quadriceps Strength, Postural Stability, and Pain Mediation in Bilateral Knee Osteoarthritis: A Comparative Analysis with Healthy Controls. Diagnostics (Basel). 2023 Oct 1;13(19):3110. doi: 10.3390/diagnostics13193110.
Ferraz R, van den Tillaar R, Marques MC. The effect of fatigue on kicking velocity in soccer players. J Hum Kinet. 2012 Dec;35:97-107. doi: 10.2478/v10078-012-0083-8. Epub 2012 Dec 30.
Gabbett TJ. The development of a test of repeated-sprint ability for elite women's soccer players. J Strength Cond Res. 2010 May;24(5):1191-4. doi: 10.1519/JSC.0b013e3181d1568c.
Mentiplay BF, Perraton LG, Bower KJ, Adair B, Pua YH, Williams GP, McGaw R, Clark RA. Assessment of Lower Limb Muscle Strength and Power Using Hand-Held and Fixed Dynamometry: A Reliability and Validity Study. PLoS One. 2015 Oct 28;10(10):e0140822. doi: 10.1371/journal.pone.0140822. eCollection 2015.
Nagasawa, Y., Demura, S., Matsuda, S., Uchida, Y., & Demura, T. (2011). Effect of differences in kicking legs, kick directions, and kick skill on kicking accuracy in soccer players. Journal of Quantitative Analysis in Sports, 7(4), 9.
Thorborg K, Holmich P, Christensen R, Petersen J, Roos EM. The Copenhagen Hip and Groin Outcome Score (HAGOS): development and validation according to the COSMIN checklist. Br J Sports Med. 2011 May;45(6):478-91. doi: 10.1136/bjsm.2010.080937.
Tomas M, Frantisek Z, Lucia M, Jaroslav T. Profile, correlation and structure of speed in youth elite soccer players. J Hum Kinet. 2014 Apr 9;40:149-59. doi: 10.2478/hukin-2014-0017. eCollection 2014 Mar 27.
Urbaniak GC, Plous S. Research randomizer (Version 4.0) [Internet]. 1997 [cited 2024 Dec 2]. Available from: http://www.randomizer.org
Other Identifiers
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RCTPI001
Identifier Type: -
Identifier Source: org_study_id
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