The aim of this study was to assess the effects of different tactical setups in small-sided games on perceptual and locomotor demands, and to evaluate the impact of session timing (beginning vs. end) on variability within and between conditions. Twenty young soccer players participated in 3 small-sided games with 6 conditions: free roles (SSGFREE), positional tactical roles (SSGPOS), and restricted areas (SSGRA), applied at the beginning and end of the session. Perceptual and locomotor responses were measured. All games were played in a 30 × 50 m area, and locomotor data were collected using GPS devices. SSGFREE resulted in lower RPE than positional formats, with higher RPE at the session's end in SSGPOS and SSGRA (p < 0.05). Players in SSGFREE covered more TD than in positional setups, and SSGPOS showed greater TD than SSGRA at the beginning (p < 0.05). VHSD was higher in SSGPOS, particularly at the session's end (p < 0.05). Higher TD, ACC, and VHSD were observed at the beginning of the session across all formats, with greater variability between sets (p < 0.05). Coaches should schedule free-play tasks early to reduce perceived effort and tactical drills later to increase intensity, fatigue, and variability.
VilarLAraújoDDavidsK, et al.The role of ecological dynamics in analysing performance in team sports. Sports Med2012; 42: 1–10.
2.
Delgado-BordonauJLMendez-VillanuevaA. Tactical periodization: mourinho’s best-kept secret ? tactical periodization : a new soccer training approach. Soccer NSCAA J2012; 3: 28–34.
3.
PolRBalaguéNRicA, et al.Training or synergizing? Complex systems principles change the understanding of sport processes. Sports Med Open2020; 6: 1–13.
4.
ClementeFMPraçaGMAquinoR, et al.Effects of pitch size on soccer players’ physiological, physical, technical, and tactical responses during small-sided games: a meta-analytical comparison. Biol Sport2023; 40: 111–147.
5.
ClementeFM. The threats of small- sided soccer games: a discussion about their differences with the match external load demands and their variability levels. Strength Cond J2020; 42: 100–105.
6.
MandorinoMTessitoreACoustouS, et al.A new approach to comparing the demands of small-sided games and soccer matches. Biol Sport2024; 41: 15–28.
7.
Bujalance-MorenoPLatorre-RománPÁGarcía-PinillosF. A systematic review on small-sided games in football players: acute and chronic adaptations. J Sports Sci2019; 37: 921–949.
8.
CastilloDRodriguez-FernandezANakamuraFY, et al.Influence of different small-sided game formats on physical and physiological demands and physical performance in young soccer players. J Strength Cond Res2021; 35: 2287–2293.
9.
Sánchez-SánchezJSánchezMRodríguez-FernándezA. Efecto agudo del espacio de interacción individual sobre la demanda física y fisiológica en futbolistas jóvenes. Rev Int Cienc Dep2023; 71: 1–15.
10.
CasamichanaDBradleyPSCastellanoJ. Influence of the varied pitch shape on soccer players physiological responses and time-motion characteristics during small-sided games. J Hum Kinet Vol2018; 15: 171–180.
11.
PaľoKNagyNVanderkaM. External and internal loads on soccer players in various organisational forms of small-sided games. J Phys Educ Sport2023; 23: 682–690.
12.
LiZMaoLKrustrupP, et al.Internal and external load during 8 v 8, 5 v 5 and 3 v 3 in Chinese elite youth male football players. Biol Sport2022; 39: 1065–1071.
13.
Sánchez-SánchezJHernándezDCasamichanaD, et al.Heart rate, technical performance, and session-RPE in elite youth soccer small-sided games played with wildcard players. J Strength Cond Res2017; 31: 2678–2685.
14.
KokluYSertOAlemdarogluU, et al.Comparison of the physiological responses and time-motion characteristics of young soccer players in small-sided games: the effect of goalkeeper. J Strength Cond Res2015; 29: 964–971.
15.
DellalALogo-PenasCWongDP, et al.Effect of the number of ball contacts within bouts of 4 vs. 4 small-sided soccer games. Int J Sports Physiol Perform2011; 6: 322–333.
16.
Sanchez-SanchezJRamirez-CampilloRCarreteroM, et al.Soccer small-sided games activities vary according to the interval regime and their order of presentation within the session. J Hum Kinet2018; 62: 167–175.
17.
NunesNAGonçalvesBCoutinhoD, et al.How numerical unbalance constraints physical and tactical individual demands of ball possession small-sided soccer games. Front Psychol2020; 11: 1464.
18.
GonçalvesBEstevesPFolgadoH, et al.Effects of pitch area-restrictions on tactical behavior, physical, and physiological performances in soccer large-sided games. J Strength Cond Res2017; 31: 2398–2408.
19.
RicATorrentsCGonçalvesB, et al.Dynamics of tactical behaviour in association football when manipulating players’ space of interaction. PLoS One2017; 12: e0180773.
20.
ClementeFMMartinsFMLMendesRS. Periodization based on small-sided soccer games: theoretical considerations. Strength Cond J2014; 36: 34–43.
21.
BenítezCFMBecerra-PatiñoBRada-PerdigónDA. Mapping the research trend in the web of science on small-sided games in soccer: a bibliometric study between 2010–2023. Retos2024; 55: 363–378.
22.
Rodríguez-FernándezAClementeFMRamírez-CampilloR, et al.Locomotor and physiological demands of small-sided soccer games in wildcard and regular players: effects of goalkeepers and type of wildcard. Sports Health2025; 17: 603–613.
23.
ClementeFMAquinoRPraçaGM, et al.Variability of internal and external loads and technical/tactical outcomes during small-sided soccer games: a systematic review. Biol Sport2021; 3: 647–672.
24.
SilvaAFGonzález-FernándezFTAquinoR, et al.Analyzing the within and between players variability of heart rate and locomotor responses in small-sided soccer games performed repeatedly over a week. Healthcare2022; 10: 1–15.
25.
CasoSvan der KampJ. Variability and creativity in small-sided conditioned games among elite soccer players. Psychol Sport Exerc2020; 48: 101645.
26.
McKayAKAStellingwerffTSmithES, et al.Defining training and performance caliber: a participant classification framework. Int J Sports Physiol Perform2022; 17: 317–331.
27.
FosterCFlorhaugJAFranklinJ, et al.A new approach to monitoring exercise training. J Strength Cond Res2001; 15: 109–115.
28.
Fernandes-da-SilvaJCastagnaCTeixeiraAS, et al.The peak velocity derived from the carminatti test is related to physical match performance in young soccer players. J Sports Sci2016; 34: 2238–2245.
29.
MaddisonRNi MhurchuC. Global positioning system: a new opportunity in physical activity measurement. Int J Behav Nutr Phys Act2009; 6: 73.
30.
BuchheitMMendez-VillanuevaASimpsonBM, et al.Match running performance and fitness in youth soccer. Int J Sports Med2010; 31: 818–825.
31.
CasamichanaDCastellanoJ. Time-motion, heart rate, perceptual and motor behaviour demands in small-sides soccer games: effects of pitch size. J Sports Sci2010; 28: 1615–1623.
32.
RampininiEImpellizzeriFMCastagnaC, et al.Factors influencing physiological responses to small-sided soccer games. J Sports Sci2007; 25: 659–666.
33.
CohenJ. Statistical power analysis for the behavioral sciences. 2nd ed. New York: Academic Press, 2013.
34.
HopkinsWGMarshallSWBatterhamAM, et al.Progressive statistics for studies in sports medicine and exercise science. Med Sci Sports Exerc2009; 41: 3–13.
35.
AtkinsonGNevillAM. Statistical methods for assessing measurement error (reliability) in variables relevant to sports medicine. Sports Med1998; 26: 217–238.
36.
BlanchfieldAHardyJMarcoraS. Non-conscious visual cues related to affect and action alter perception of effort and endurance performance. Front Hum Neurosci2014; 8: 967.
37.
MarcoraSMStaianoW. The limit to exercise tolerance in humans: mind over muscle?Eur J Appl Physiol2010; 109: 763–770.
CoutinhoDGonçalvesBWongDP, et al.Exploring the effects of mental and muscular fatigue in soccer players’ performance. Hum Mov Sci2018; 58: 287–296.
40.
KunrathCACardosoFCalvoTG, et al.Mental fatigue in soccer: a systematic review. Rev Bras Med Esporte2020; 26: 172–178.
41.
BadinOOSmithMRConteD, et al.Mental fatigue: impairment of technical performance in small-sided soccer games. Int J Sports Physiol Perform2016; 11: 1100–1105.
42.
MortimerHDallawayNRingC. Effects of isolated and combined mental and physical fatigue on motor skill and endurance exercise performance. Psychol Sport Exerc2024; 75: 102720.
43.
Sanchez-SanchezJGarcíaMSAsián-ClementeJA, et al.Effects of the directionality and the order of presentation within the session on the physical demands of small-sided games in youth soccer. Asian J Sports Medicine2019; 10: 2.
44.
DuarteRAraújoDCorreiaV, et al.Competing together: assessing the dynamics of team–team and player–team synchrony in professional association football. Hum Mov Sci2013; 32: 555–566.
45.
SmithMRCouttsAJMerliniM, et al.Mental fatigue impairs soccer-specific physical and technical performance. Med Sci Sports Exerc2016; 48: 267–276.
46.
GuoZChenRZhangK, et al.The impairing effect of mental fatigue on visual sustained attention under monotonous multi-object visual attention task in long durations: an event-related potential based study. PLoS One2016; 11: e0163360.
47.
CoutinhoDGonçalvesBTravassosB, et al.Effects of pitch spatial references on players’ positioning and physical performances during football small-sided games. J Sports Sci2019; 37: 741–747.
48.
GranacherULesinskiMBüschD, et al.Effects of resistance training in youth athletes on muscular fitness and athletic performance: a conceptual model for long-term athlete development. Front Physiol2016; 7: 164.
