Evaluation of selected cardiopulmonary and perceived exertion responses to four infant carrying methods utilised by African Mothers.

Various infant carrying methods (ICMs) are utilised for childcare. Effects of these ICMs on the cardiopulmonary system are not known. This study evaluated cardiopulmonary and perceptual responses to four ICMs (back, front, side and in-arms) among 30 young females (18-35 years) while walking with a 6 kg simulated infant. Diastolic blood pressure (BP) responses were significantly different ( .009) across the four ICMs, with the back ICM eliciting highest response. Heart rate, respiratory rate and systolic BP responses were not significantly different ( .05) across the ICMs. Participants perceived the in-arms ICM as the most exerting. Body weight ( .036) and body mass index (BMI) ( .011) significantly correlated with systolic BP responses during the side ICM while age significantly ( .036) correlated with heart rate changes during the in-arms ICM. Back ICM may pose more risk of diastolic BP dysfunctions. Increased body weight and BMI result in decreased systolic BP responses. IMPACT STATEMENT Infant carrying (IC) has been associated with increased energy cost, biomechanical changes and musculoskeletal injuries. There is paucity of data on the cardiopulmonary responses to IC. Back ICM resulted in higher responses in diastolic blood pressure. During the side ICM, participants' systolic BP decreased with increasing body weight and BMI values. Increased age resulted to decreased heart rate responses during the in-arms ICM. There is need for effective monitoring of the cardiopulmonary parameters during IC tasks, especially among women with cardiopulmonary dysfunctions. Women with diastolic dysfunctions should be discouraged from utilising the back ICM. It is necessary for further studies to evaluate infant carrying-related cardiopulmonary responses relative to various components of IC practices, including weight of infant, maternal anthropometric characteristics and duration of IC tasks during each infant carrying method.