RSA	Repeated sprint ability
ATP-CP	Adenosine triphosphate-creatine phosphate system
PPO	Peak power output
MPO	Mean power output
BW	Body weight
PRISMA	Preferred Reporting Items for Systematic Evaluation and Meta-Analysis
PROSPERO	International Prospective Register of Systematic Reviews
SD	Standard deviation
WMD	Weighted mean difference
CI	Confidence interval
SE	Standard error