Swimming Sessions: Broken 100s (Second Variation)
First in this ‘Broken 100s’ series, we did some broken 100s where we increased rest intervals through the set (5s / 10s / 15s / 20s). Then we progressed this set in the ‘First Variation’, swimming the broken 100s with really short rest intervals (5 seconds), trying to hold a strong pace.
This third session (‘Second Variation’) progresses the idea further.
Blocks of 3 x 100m
This set uses blocks of 3 x 100s – repeated several times.
- The first 100m includes 10s rest after each 25m.
- The second 100m we are dropping the rest interval to 5 seconds per 25m
- The third 100m is a straight 100m. No broken 100m here.
In other words:
- 4 x 25m (10s rest)
- 4 x 25m (5s rest)
- 100m
Take an additional 30s rest after each 100m.
Pacing
We want the third 100m, the straight 100m, to be a strong pace (an 8 or even 9 out of 10).
For this set, keep in mind we are trying to hit the same pace on each of the 100s.
You are a fast swimmer and can hit a 1.20 on your straight 100m. You want to be swimming the first two 100s – the broken 100s – at 20s per length.
Hitting this pace on the first hundred will feel quite ‘easy’ – with 10s rest after each 25m. The second 100m will feel a little more challenging, with only five seconds rest. The straight 100m will feel hard – but manageable.
A 1.40 swimmer would aim for 25s per 25m on the broken efforts. The 2.00 swimmer would aim for 30s for 25m.
Sets & Scaling
I did five sets of 3 x 100m during a recent swim session (15 x 100m)
You can do as many sets as you have energy and time for!
Session
You can pick a warm up depending on how much time you have and how much volume you want in your session. I only had time for a short swim, so my session was:
Warm Up
10 x 50m smooth and relaxed (15s)
Main Set
15 x 100m – so five sets of 3 x 100m (as above)
Cool Down
8 x 25m easy (10s)

Here is a PDF of the session for you to print and take to the pool or file away in your swim sessions folder!
Swimming Sessions: Broken 100s (Second Variation)