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. 2024 Jan 8;40(1):e00097323. doi: 10.1590/0102-311XEN097323

Box 2. Barriers to physical activity reported by pregnant women regarding the potential harms of cycling.

BARRIERS STATEMENTS
Type of movement and effort level I think that’s too much effort! I believe it’s too much! Maybe if you take it slow (...) but I am not sure. The legs bend a lot. It demands strength” (C., 31 years old, decreased physical activity, high schooling). “Before leaving [doctor’s appointment] I asked: I miss riding my bike, could I get back on my bike? [the reply was]) - ‘If everything is ok with your pregnancy and nothing hurts, don’t change anything. Do not ride (...)’ [and the doctor concluded] ‘you’d better not risk it”. If it depended on me, I would keep riding” (J., 26 years, stopped physical cativity, high schooling).
Miscarriage I used to walk; I didn’t know I could not ride a bike. ‘What did she [neighbor] say?’. She lost her first baby when riding a bike. My boyfriend’s cousin lost her baby riding a motorcycle. ‘- Why, did she crash?’. I don’t know, I didn’t ask her! My neighbor also said that because she was cycling constantly, I think she hit here [pelvic area] and lost the baby. ‘And did you stop cycling?’. Yes (...) I was afraid (...) Sometimes I think it is not true, a myth, but I’d rather not risk!” (J., 17 years, remained active, low schooling).
Bumping/Shaking I am afraid of the impact from the bike saddle ‘- Could that harm you or the baby?’. Disturbing, moving, misplacing something here inside! When we are pregnant, we wonder, the bumps from riding, maybe hitting a pothole, a rock, I believe it is harmful, right? If you fall (...) I consider being pregnant and falling, there is no reason to take that risk. Also falling and getting injured, displacing the placenta, I don’t know, causing the uterus to rupture due to the impact...” (M., 19 years, remained active, low schooling).
Malformations After I was sure I was pregnant, I told her that it was not good to ride my bike in the beginning because the fetus is growing and could develop malformations. ‘Did the doctor say that?’. Yes, and harm the baby. But I should wait a while, like until the sixth month, then I could ride again. But how can I ride now with such a big belly? (...) when the fetus is growing, he/she grows upside down, [right?], or upright, I don’t know! It could hurt a body part, arms, legs. ‘By pressing the baby?’. Yes, pressing and bending the limbs of the baby, causing a malformation (...) maybe a foot, a leg, an arm”. (S., 31 years, decreased physical activiy, low schooling).