Abstract
The objective of this systematic review with meta-analysis was to compare the
endurance performance chronic adaptations induced by running-based
high-intensity interval training (HIIT), small-sided games (SSGs), and combined
HIIT+SSGs in male and female youth and adult soccer players. The studies
included in this review followed the PICOS criteria: (i) healthy soccer players;
(ii) interventions based on SSGs; (iii) comparators exposed to only HIIT or
combined SSGs+HIIT; (iv) endurance performance variables. Studies were
searched for in the following databases: (i) PubMed; (ii) Scopus; (iii)
SPORTDiscus; (iv) Web of Science. After conducting an initial database search
that retrieved a total of 5,389 records, a thorough screening process resulted
in the inclusion of 20 articles that met the eligibility criteria. Sixteen
studies reported outcomes related to endurance performance measured through
field-based tests, while five studies provided results from direct measurements
of maximal oxygen uptake (VO2max). Results showed a non-significant
small-magnitude favoring effect for the HIIT groups compared to the SSG groups
(ES=0.37, p= 0.074) for endurance, while a non-significant
small-magnitude favoring SSGs was observed (ES=–0.20,
p= 0.303) for VO2max. Despite the very low certainty of
evidence, the findings suggest similar effects induced by both SSG and HIIT on
improving endurance performance and VO2max.
Key words football - high-intensity interval training - aerobic exercise - athletic performance - physical fitness
