2. Table template for the characteristics of included studies.

Methods	Design: (e.g. parallel RCT, cross‐over RCT, cluster‐RCT)
Participants	Sample size Randomisation: Randomised (overall number of participants) Experimental: Control: Analysed (participants included in the analysis) Experimental: Control:
	Setting: (e.g. outpatient, inpatient, multicentre, national/international)
	Inclusion criteria List
	Exclusion criteria List
	SCI information Experimental group Neurological level of SCI (N/N paraplegia/tetraplegia) AIS classification (% AIS A, B, C, and D) Type of SCI (N/N traumatic/non‐traumatic) Motor score (points) Time since injury (years) Control group Neurological level of SCI (N/N paraplegia/tetraplegia) AIS classification (% AIS A, B, C, and D) Type of SCI (N/N traumatic/non‐traumatic) Motor score (points) Time since injury (years)
	Mean age (years) (SD) Overall: Experimental: Control:
	Gender/Sex (N/N male/female) Overall: Experimental: Control:
Intervention	Total groups:
	Experimental: physical exercise training for CRF Mode of training (the use of the upper and lower limbs, use of electrical stimulation and the modalities of physical exercise) Training period (weeks) Overall number of training sessions Frequency (sessions/day; sessions/week) Intensity (RPE score; power output; % HRR; or %V̇O2R) Time (session duration; minutes) Volume of training (session duration x number of sessions; hours) Progression (any details of progression training parameters) Adherence (number of sessions completed; %)
	Control: Relevant information about control group intervention
	Co‐intervention: Relevant information about any co‐interventions, including usual care, provided to both groups
Outcomes	Primary outcomes List Secondary outcomes List Note: describe details about when each outcome was taken.
Notes	Dropouts/withdrawals (n, reason) Experimental: Control:
	Funding sources:
	Trial registration or published protocol:
	Other relevant information:
Risk of bias
Bias	Authors' judgement	Support for judgement
Randomisation process	Rated risk	Quote/comment
Deviations from the intended intervention	Rated risk	Quote/comment
Missing outcome data	Rated risk	Quote/comment
Measurement of the outcome	Rated risk	Quote/comment
Selection of the reported result	Rated risk	Quote/comment
Identification/recruitment of individual participantsa	Rated risk	Quote/comment

Abbreviations: AIS: American Spinal Injury Association (ASIA) Impairment Scale; HRR: heart rate reserve; RCT: randomised controlled trial; RPE: rate of perceived exertion; SCI: spinal cord injury; V̇O₂R: oxygen consumption/uptake reserve

^aBias only related to cluster‐RCTs