Cold and wind can also be a problem. While a lightly dressed jogger will produce adequate body heat, a sitting child won't. So don't judge the child's comfort by how you feel. Bike Seats and Trailers Choosing. Bicycling with a young passenger may be more dangerous than jogging with a stroller.
Some experts totally reject the idea of child bicycle seats.
The added weight can shift unpredictably, especially if the child weighs more than 40 pounds. Others say cycling can be safe with adequate precautions. The child must be at least 1 and able to hold his or her head up. The rear-mounted seat is more popular, possibly because it feels more natural to bikers and because parents feel more protective with their child behind them. But the jury is out on which version is safer.