ジョルジュ・サンピエールのインスタグラム(georgesstpierre) - 9月14日 06時32分

I’m not a good sprinter, but I do it because it’s one of the best exercises to increase testosterone.
Most people I’ve spoken to don’t know that short interval sprinting will often provide them with more benefits than low/medium intensity long distance running. 👍

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