Butterfly-lover’s IM set.
Swim four rounds of the following. Alternate fins/no fins by round. Rounds 2 and 4 are faster than rounds 1 and 3.
1 X 250 (100 FL + 75 BK + 50 BR + 25 FR)
1 X 150 (75 FL + 50 BK + 25 BR)
1 X 75 (50 FL + 25 BK)
1 X 125, broken (25 FL… rest :10…100 FR)
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