Table 1.

Criteria list for the methodological quality assessment

No.	Item	Score
1	Sample description: + Properties of the subjects (age, weight, height, sex) + Definition of the population (well-trained, recreationally trained or untrained) + Training status and training years in strength or power training	0 or 1
2	Procedure description: + Detailed description of the test (exercise and loading conditions employed) + Detailed description of the intervention protocol (randomised order to exercises, developed exercises in different days and order for all subjects)	0 or 1
3	Intervention: + Defined and supervised exercises technique (bar position, depth of the half-squat, elbows extension) + Defined number of trials to lifts + Defined adequate recovery between trials across all lifts	0 or 1
4	Instruments and methods employed for kinetic and kinematic calculation: + A FP method and the combined method (FP + 3D motion) employed in the assessment was valued as quality criteria for ballistic exercises (PP, PJ and SJ), since the ground reaction forces measured or calculated using a FP provide the most accurate method to assess forces during lower-body ballistic exercises [81, 82]. Furthermore, both methods have shown an agreement in measuring power output during ballistic exercises [83]. Moreover, when an LPT, accelerometer or any other kinematic device was employed assessing the velocity of the bar, only bar mass should have been used for power output calculations. However, when an FP was employed, both the bar mass and the lifter’s mass (system of mass) should have been used following the guidelines provided by Hori et al. [84]	0 or 1
5	Measurement system, data collection, and data analysis: Instrument description (brand, model and origin country of the product) + Defined sampling frequency + Defined configuration and variable calculation of the instrument + Defined and developed reliability test when proceed + Defined collection software for recording and analysing data	0 or 1
6	Results detailed + Measure of the central tendency + Variation or dispersion from the average	0 or 1

FP force platform, 3D three-dimensional, PP push press, PJ push jerk, SJ split jerk, LPT lineal position transducer