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Swimming session glossary.

A simple guide to the abbreviations, drills, equipment and pace instructions used throughout your J Moro Performance swimming sessions.

Looking for something specific?
Use the search bar below and type terms such as CSS, P&P, kk or scull.

Reference guide

Abbreviations and terminology

Select a term to view its explanation and an example.

Regular freestyle, also known as front crawl.

600 Fr = swim 600 metres freestyle

Backstroke swimming.

100 Bk or Br = choose backstroke or breaststroke

Breaststroke swimming.

50 Br = swim 50 metres breaststroke

Butterfly stroke or butterfly kick, depending on the instruction.

100 Fly kk on back = butterfly kick while lying on your back

Swim butterfly, backstroke, breaststroke and freestyle in that order, split evenly across the distance.

100 IM = 25 Fly, 25 Bk, 25 Br, 25 Fr

Choose whichever stroke or combination of strokes is most appropriate for you.

800 Choice = complete 800 metres using your preferred stroke mix

Swim with a pull buoy between your thighs and hand paddles on.

3 × 200 P&P = three 200s using pull buoy and paddles

Wear short swim fins for the listed repetitions or block.

FINS ON: { … } = keep fins on for everything inside the brackets

Hand paddles increase the surface area of your hands and add resistance during the pull.

Fins + Paddles = wear both pieces of equipment

Swim using a pull buoy, with minimal or no kicking unless otherwise stated.

3 × 200 Pull = three 200s using a pull buoy

A band worn around the ankles to prevent kicking and increase the demand on body position and the upper body. A pull buoy can be placed at the ankles as an alternative when no band is available.

4 × 100 Fr w/ Bands

Complete the kick repetition in a streamlined or side position without holding a kickboard.

FINS side kk (no board)

Kick only. The body position, stroke or equipment will be specified where required.

50 kk = 50 metres kick

Freestyle using one arm at a time. Unless otherwise stated, change arms halfway through the distance.

50 SA Fr = usually 25 right arm, 25 left arm

Small, controlled hand movements used to improve your feel for the water and awareness of pressure through the hands and forearms.

25 scull, 25 Fr

Perform five sculling movements, then take three full freestyle strokes. Repeat this pattern for the full distance.

6 × 50 (1 five-sculls/three-strokes, 1 Fr)

A freestyle pull drill performed without the arms recovering over the water. Extend forward underwater after each pull to focus on the catch and underwater pathway.

200 (25 Long Dog, 25 Fr)

Lightly drag the fingertips along the surface during the freestyle recovery to encourage a relaxed arm and controlled elbow position.

100 (50 Finger Drag, 50 Fr)

Kick while lying on your side, usually with the lower arm extended and the upper arm resting by your side. Change sides halfway unless otherwise stated.

50 side kk = usually 25 metres each side

Butterfly or dolphin kick. When written “on back,” lie face-up and generate the movement through the hips and core.

100 Fly kk on back

Start your recovery phase with one arm, bringing your hand up your body to your armpit. When your hand reaches your armpit, stop the forward movement and instead straighten your arm into the air and then back down to your armpit before continuing with your stroke.

100 Popoff

Keep one arm extended in front until the recovering hand reaches it, then begin the next stroke. Focus on length and control rather than pausing excessively.

100 Catchup

Change where the arms are positioned every 25 metres, such as front scull, mid-catch scull and finish scull.

75 scull changing arm position every 25

Gradually increase your speed throughout the repetition. Start controlled and finish fast without sprinting too early.

50 Fr Build = become progressively faster across the 50

Your personalised threshold pace, normally expressed as a time per 100 metres. It is used to prescribe both swimming speed and send-off times.

CSS 1:30/100 m means a 200 @CSS target of approximately 3:00

Swim the repetition at your calculated CSS pace for the full distance.

100 @CSS with CSS 1:30 = target approximately 1:30

Add three seconds per 100 metres to your CSS pace. Multiply that adjusted pace across longer repetitions.

CSS 1:30 → CSS+3 is 1:33/100 m → 200 target approximately 3:06

Subtract two seconds per 100 metres from your CSS pace.

CSS 1:30 → CSS−2 is 1:28/100 m

The clock time at which each repetition starts. Your rest is whatever remains after you finish.

100 leaving on CSS+15 sec with CSS 1:30 = start every 1:45

Rest for the stated amount of time after finishing each repetition, regardless of how long the repetition took.

6 × 50 Strong, 15 sec rest

The distance to swim within a repetition.

15 m fast, 35 m easy = the first 15 metres fast, then 35 metres easy

The first number tells you how many repetitions to complete. The second number is the distance of each repetition.

4 × 50 = four repetitions of 50 metres

Instructions inside brackets explain how each repetition or distance should be divided.

150 (50 kk, 50 SA Fr, 50 Fr)

Everything inside the braces belongs to one block. Repeat the entire block the number of times shown before it.

3 × { … } = complete everything inside the braces three times

Alternate between the two instructions. The first repetition is fast, the second is easy, then repeat that pattern.

10 × 50 (1 fast, 1 easy) = 5 fast 50s and 5 easy 50s

Complete the repetition using the listed equipment or instruction.

Fr w/ Bands = freestyle with an ankle band

Relaxed swimming used for recovery. Keep the effort low and focus on smooth technique.

100 easy

A purposeful, challenging effort that remains controlled and technically sound. It is not an all-out sprint.

4 × 100 Fr Strong

Swim at high speed while maintaining good technique. Unless “maximum” or “all-out” is stated, avoid sacrificing form.

15 m fast, 35 m easy

Swim faster each interval for the designated amount of intervals

3x100 Fr Desc 1-3

Place 1 paddle on the crown of your head. Swim freestyle normally trying to not move the paddle as you breath to the side. If done correctly the paddle will stay in place.

100 Paddle on head drill

Every time you start your recovery over the water. Bring your hand up to your armpit, then back down to your hip, before finally bringing your arm all the way forward and over to the front.

100 Sharkfin drill

Place one arm by your side, the other arm is in front of you in the "catch position" with your elbow bent at 90 degrees. It should feel like you are creating a wall with your front arm to push against the water.

100 Wall drill
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Session basics

How to read a swimming set

Most instructions follow the same simple structure.

1. Repetitions and distance

The first number is how many times you swim. The second is the distance of each repetition.

4 × 100 = four repetitions of 100 metres

2. Pace target

The pace instruction tells you how quickly each repetition should be completed.

@CSS−2 = two seconds per 100 m faster than CSS

3. Send-off or rest

A send-off includes both swimming and rest. A fixed-rest instruction starts after you finish.

Leaving on CSS+15 sec ≠ 15 sec fixed rest

Worked example

Breaking down a full instruction

2 × { 6 × 50 @CSS leaving on CSS+10 sec 1 × 100 @CSS−2 leaving on CSS+15 sec 100 easy }
2 × { … } Complete the entire block twice.
6 × 50 @CSS Swim six 50-metre repetitions at your CSS pace.
Leaving on CSS+10 sec Calculate the CSS time for 50 metres, then add 10 seconds to determine the send-off.
100 @CSS−2 Swim 100 metres two seconds faster than your usual CSS time per 100 metres.
100 easy Finish the block with 100 metres of relaxed recovery swimming.

Pace calculator

Calculate your CSS pace.

Enter your best recent 400 m and 200 m time-trial results. Your Critical Swim Speed will be calculated as a pace per 100 metres.

01

400 m time trial

Enter your total time for 400 metres.

02

200 m time trial

Enter your total time for 200 metres.

How the calculation works

Your 200 m time is subtracted from your 400 m time. The remaining time is divided by two to calculate your CSS pace per 100 metres.

Need help?

Still unsure about an instruction?

Leave a comment on Final Surge on the workout you are unsure about and your coach will respond ASAP. Alternatively, submit an enquiry and your coach will get back to you.

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