10k Training
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| Building strong torso muscles makes you a better runner. Roll-ins on the ball help to activate the hips, glutes, back extensors, and abdominals. | Keywords: No keywords |
| Picture sizes: Preview image Small picture Large picture Original picture Technical information: Camera: Sony Ericsson Camera model: W580i Resolution: 1200x1600 Date taken: 2/22/09 11:30 AM Exposure time: 1/15 Aperture: 2.8 ISO: 400 Light measurement: CenterWeightedAverage | |
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