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I've started working out on the tredmill at 12km/hr for 30 minutes almost every day. For the last 3 minutes I kick it up to 14-15km/hr. Is this a good workout or am I better to run on an incline but slower?

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@Jay-what are your fitness goals? – Bee Jun 28 '12 at 10:27
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Running flat will tend to train your stamina while running on an incline will help to increase your leg endurance and strength. So the answer depends on your running goals.

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