Tom Plenys, a CCA research and policy manager, says, "Due to a child's developing body and lungs, narrower airways, faster metabolism and faster-than-adult breathing rate, children riding our buses are the most susceptible to the hazards of diesel exhaust.

Flashing lights: danger: polluting school bus ahead by Coughlin, Erin / E

Heart and breathing rate are fairly self-explanatory, but it is useful to define the others in more detail: power is the sense of muscle strength you are applying to a run, tempo is the rate at which your arms and legs are moving, and intensity is your relative sense of comfort or discomfort.

You and your running by Running & FitNews

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Breathing the Water
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Breathing urge

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