Clinical trial NCT06723587: Chronic Effects of the Use of Instep Weights on Specific Capacities in Soccer Players
Official title: Chronic Effects of the Use of Instep Weights on Technical, Physical and Perceptual Parameters in Young Male Soccer Players
Study type: INTERVENTIONAL
Overall status: COMPLETED
Phase: NA
Conditions: Soccer
Physical Stress
Physical Performance
Keywords: Performance
Accuracy
Agility
Soccer
Lead sponsor: University of Vic - Central University of Catalonia
Sponsor class: OTHER
First posted: 2024-12-09
Enrollment: 42
Sex: MALE
Minimum age (years): 16
Maximum age (years): 19
Standard ages: CHILD
ADULT
Accepts healthy volunteers: no
Allocation: RANDOMIZED
Intervention model: PARALLEL
Primary purpose: OTHER

Brief summary: The main goal of this randomized controlled trial (RCT) is to evaluate the chronic effects of using instep weights on technical, physical (conditional), and perceptual parameters in amateur male soccer players.

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.

Detailed description: A RCT will be performed and players will be randomly assigned in one of the two groups (experimental or control).

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.

Eligibility criteria: Inclusion Criteria:

* amateur young male soccer player (under federation regulation)
* minimum three years of experience playing soccer
* train 3 days/week and 5 hours/week (minimum)

Exclusion Criteria:

* Injured players
* 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

Primary outcomes:
measure: Hip and Groin Outcome Score (HAGOS)
timeFrame: Pre-intervention (first day of week 1), mid-intervention (first day of week 5), and post-intervention (first day of week 9)
measure: Subjective perceptual well-being questionnaire measures change: RPE
timeFrame: The questionnaire will be administered within the first 15-20 minutes following the conclusion of each training session.
measure: Ball Striking Accuracy Test
timeFrame: Pre-intervention (first day of week 1), mid-intervention (first day of week 5), and post-intervention (first day of week 9)
measure: Ball Striking Velocity Test
timeFrame: Pre-intervention (first day of week 1), mid-intervention (first day of week 5), and post-intervention (first day of week 9)
measure: Change of Direction (COD) and Ball Control
timeFrame: Pre-intervention (first day of week 1), mid-intervention (first day of week 5), and post-intervention (first day of week 9)
measure: Repeated Sprint Ability (RSA)
timeFrame: Pre-intervention (first day of week 1), mid-intervention (first day of week 5), and post-intervention (first day of week 9)
measure: Adductors Maximum Voluntary Contraction (MVC)
timeFrame: Pre-intervention (first day of week 1), mid-intervention (first day of week 5), and post-intervention (first day of week 9)
measure: Knee extensors Maximum Voluntary Contraction (MVC)
timeFrame: Pre-intervention (first day of week 1), mid-intervention (first day of week 5), and post-intervention (first day of week 9)
measure: Knee flexors Maximum Voluntary Contraction (MVC)
timeFrame: Pre-intervention (first day of week 1), mid-intervention (first day of week 5), and post-intervention (first day of week 9)
measure: Body mass
timeFrame: Pre-intervention (first day of week 1), mid-intervention (first day of week 5), and post-intervention (first day of week 9)
Secondary outcomes:
Other outcomes:
Locations:
city: Vic
country: Spain
facility: University of Vic-Central University of Catalonia
Study officials:
affiliation: Lecturer and Researcher
name: Albert Altarriba-Bartes, PhD
role: PRINCIPAL_INVESTIGATOR
References:
citation: Borg GA. Psychophysical bases of perceived exertion. Med Sci Sports Exerc. 1982;14(5):377-81.
citation: 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.
citation: 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.
citation: 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.
citation: 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.
citation: 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.
citation: 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.
citation: 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.
citation: 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.
citation: 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.
citation: 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.
citation: Urbaniak GC, Plous S. Research randomizer (Version 4.0) [Internet]. 1997 [cited 2024 Dec 2]. Available from: http://www.randomizer.org