Stensrud et al. 2006 [16] Randomised Unable to blind study due No important Standard of No serious No further considerations Low control to environmental inconsistencies asthmatic subjects imprecision conditions below standard expected for elite or No control group employed competitive athletes (mean ± SD VO2max is a poor VO2max: 47 predictor of athletic mL.kg-1.min-1) performance Severity of EIB not defined Stensrud et al. 2007 [15] Randomised Unable to blind study due No important Standard of No serious No further considerations Low . control to environmental inconsistencies asthmatic subjects imprecision conditions below standard expected for elite or No control group employed competitive athletes (mean ± SD VO2max is a poor VO2max: 47 predictor of athletic mL.kg-1.min-1) performance Study population replicated from previous findings () Severity of EIB not defined Teixeira et al. 2012 [11] Observational VO2max is a poor No important Direct Low subject No further considerations Very low predictor of athletic inconsistencies numbers performance Severity of EIB not defined Medication Freeman et al. 1989 [19] Randomised VO2max is a poor No important Asthmatic subjects No serious No further considerations Low control predictor of athletic inconsistencies recruited rather imprecision performance than individuals with objective Severity of airway evidence of EIB obstruction not defined Standard of asthmatic subjects below standard
Stensrud et al. 2006 [16] Randomised control Unable to blind study due to environmental conditions No control group employed VO2max is a poor predictor of athletic performance Severity of EIB not defined No important inconsistencies Standard of asthmatic subjects below standard expected for elite or competitive athletes (mean ± SD VO2max: 47 mL.kg-1.min-1) No serious imprecision No further considerations Low Stensrud et al. 2007 [15] . Randomised control Unable to blind study due to environmental conditions No control group employed VO2max is a poor predictor of athletic performance Study population replicated from previous findings () Severity of EIB not defined No important inconsistencies Standard of asthmatic subjects below standard expected for elite or competitive athletes (mean ± SD VO2max: 47 mL.kg-1.min-1) No serious imprecision No further considerations Low Teixeira et al. 2012 [11] Observational VO2max is a poor predictor of athletic performance Severity of EIB not defined No important inconsistencies Direct Low subject numbers No further considerations Very low Medication Freeman et al. 1989 [19] Randomised control VO2max is a poor predictor of athletic performance Severity of airway obstruction not defined No important inconsistencies Asthmatic subjects recruited rather than individuals with objective evidence of EIB Standard of asthmatic subjects below standard No serious imprecision No further considerations Low