Wolfe 1999.

Methods	Randomization method not described.
Participants	55 healthy, previously sedentary pregnant women at beginning of second trimester.
Interventions	Experimental: aerobic conditioning (stair stepping) 30 minutes 3 times per week plus light muscular conditioning during second and third trimesters. Control: light muscular conditioning only.
Outcomes	Physical fitness; infant birthweight, length, body circumferences, limb lengths, adiposity.
Notes	Published abstract only; no information on losses, post‐randomization exclusions, or compliance. No reported quantitative outcomes to enter in the meta‐analysis.
Risk of bias
Bias	Authors' judgement	Support for judgement
Adequate sequence generation?	Unclear risk	Not described.
Allocation concealment?	Unclear risk	Not described.
Blinding? All outcomes	High risk	Nature of intervention prevents blinding of participants. No mention of blinding of outcome assessors, but most outcomes are objectively measured, and thus risk of biased measurement is low.
Incomplete outcome data addressed? All outcomes	Unclear risk	No information on losses of any type.
Free of selective reporting?	Unclear risk	Information insufficient to assess.
Free of other bias?	Unclear risk	Information insufficient to assess.

BMI: body mass index 
 ITT: intention to treat 
 IUGR: intrauterine growth restriction 
 SD: standard deviation 
 SEM: standard error of the mean 
 SGA: small‐for‐gestational age