What's the ideal running weight? Do you have to be slim to run well? To run your fastest 5K or marathon, you don't have to lose weight. In fact, losing weight can slow you down.

How to beat your running PB: the 'ideal run weight' doesn't exist

Strong Women

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If you have greater muscle mass on your body, you are going to be more powerful and more resistant to injury – even though you weigh more

How to practice body neutrality when it comes to running

You probably need to eat more –  not less – to run well.

How to beat your running PB has nothing to do with weight or size