Stop-start technique

5 mins 35 secs

5 mins 3 secs

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8 mins 49 secs

12 mins 43 secs

10 mins 8 secs

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17 mins 17 secs

33 mins 49 secs

2 mins 18 secs

22 mins 9 secs

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25 mins 16 secs

22 mins 52 secs

23 mins 39 secs

28 mins 19 secs

25 mins 28 secs

20 mins 53 secs

2 mins 13 secs

21 mins 7 secs

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27 mins 36 secs

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20 mins 49 secs

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22 mins 36 secs

20 mins

21 mins 7 secs

22 mins 11 secs

20 mins 15 secs

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25 mins 39 secs

1 min 59 secs

20 mins 31 secs