Katsuo勝魚
For Swimmers

Hold the back half
of the set.

Less burn into the wall. More turn into the next hundred.

Swimmer pushing off the pool edge
Lane 4 · 25 mSet 3 of 4
Main set

10 × 100, descend the back half.

The interval that separates the masters lane is not the front half — it is whether 7 through 10 still hold.

#1
1:18
#2
1:18
#3
1:18
#4
1:19
#5
1:18
#6
1:18
#7
1:18
#8
1:18
#9
1:17
#10
1:16
−2 s

Same swimmer · 6-week protocol · descend on the back half

Where it lands

Lap 28.

Lactate does not care that you are horizontal. The forearm burn at the 700 mark is the same problem the runner solves at mile 20 — and the same lever solves it.

Round 1

Main-set capacity

The third round of 10×100. Same pace, descending interval — without falling apart on the back half.

Round 2

Race-pace volume

When the workout calls for lactate work, you get the volume — not the version of it your forearms allow.

Round 3

Doubles

Morning yards, evening yards. The afternoon between them stops being a recovery problem.

Open-water swim past a torii gate at first light
Open water · first light

Same set, descending interval.