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Recreational soccer (RS) is widely used for adolescents as a physical activity method. However, its impact on physical fitness, body composition and metabolic health in adolescents has not been extensively examined yet. The purpose of the present study was to examine the contribution of changes in body fatness and aerobic capacity to modifications in circulating blood lipids profile, following 8-weeks of RS in healthy youth. Fifty-three healthy male adolescents were separated in three groups: one performed RS (3 times x 60 min/week); the other two were served as control groups [soccer-specific training (SST) one and inactive one]. Physical fitness, body composition and blood lipids and glucose responses were evaluated before and after 8-weeks of exercise intervention. Post-intervention body weight and body fat percentage (BF%) were lowered, while physical fitness was improved (p < 0.05) in SST group only. High density lipoprotein cholesterol (HDL-C) was higher (n2 =.378) and total cholesterol (TC)/HDL-C ratio was lower (n2 =.195) in the SST group relative to RS and inactive groups (p < 0.05). In conclusion, although RS may improve aerobic capacity, relative to inactive control group, it does not influence body fatness and cardiometabolic health in adolescents. Consequently, RS may not secure health benefit during the crucial transition period from adolescence to adulthood.

Additional file 4: Table 3. Data values extracted from the included eight studies on Diet Quality: β (Beta coefficients), r (correlation coefficient), OR (Odd Ratio).

Suppplementary_files for The effects of moderate alterations in adrenergic activity on acute appetite regulation in obese women: A randomised crossover trial by Fotini Tsofliou, Yannis P Pitsiladis, Jose Lara, Marios Hadjicharalambous, Ian A Macdonald, Mike A Wallace and Mike E J Lean in Nutrition and Health

Additional file 5: Table 4. Data values extracted from the included studies on food intake and frequency of consumption: ↑ (increase), ↓ (decrease), (no association).

Additional file 2.

Additional file 1: Table 1. Search strategy.

Supplemental Material, STROBE-checklist for Effects of lunch club attendance on the dietary intake of older adults in the UK: A pilot cross-sectional study by Fotini Tsofliou, Maria G Grammatikopoulou, Rosie Lumley, Konstantinos Gkiouras, Jose Lara and Carol Clark in Nutrition and Health

Additional file 3 Table 2. Characteristics extracted from the 24 included studies: BS (Breakfast skippers), BE (Breakfast eaters), CS (Cross-Sectional), LG (Longitudinal), y (years), m (months), FFQ (Food Frequency Questionnaire, WFR (Weigh food record), SES (Socioeconomic status), PA (Physical Activity), AM (Anthropometric measures), − (not reported).