関連ワード:  can you train for a 5k in one week    can you prepare for a 5k in one week    can you train for a 5k in 1 week    can you train for a 5k in 2 weeks    can you train for a 5k in 3 weeks    can you train for a 5k in 4 weeks    can you train for a 5k in 6 weeks    can you train for a 5k in 8 weeks    can you train for a 5k in 5 weeks    can you train for a 5k in 7 weeks