If there’s one item in your equipment bag that’s best for improving your swimming performance, it’s the fin! Fins are versatile and can help you improve your technique, flexibility, body position and more.

Check out 8 benefits of swimming with fins:

1) Improved Kick Technique

If you’re like most swimmers, your kick might be the worst part of your swim technique. Whether it’s with a kick board or in streamline, you seem to go absolutely nowhere during kick sets. This has less to do with your leg strength and more to do with your kick technique.

A proper flutter kick technique is narrow and compact. The best kick is short and fast, rather than big and powerful. Your legs are essentially straight and the power is generated from the hips. Toes should be pointed, and you should strive to kick both up and down — the “up-kick” is usually weak in many swimmers.

Related: How To Improve Your Underwater Dolphin Kick

The up-kick engages your hamstrings, glutes and lower back muscles, and fins can help build strength here. Adding resistance to this range of motion helps improve your technique, providing you with the positive muscle reinforcement (and propulsion) to make you more efficient and faster.

Related: How to Get the Most Out of Your Swim Equipment

2) Improved Ankle Flexibility

An efficient kick has a small amplitude. Your feet should separate no more than 12 inches during any part of the kick. To do this, you need straight legs and, most importantly, great ankle flexibility. This is something that only develops over time, and some swimmers are naturally more flexible than others.

Applying fins to kick training and swimming will dramatically increase your ankles’ adaptation to a more efficient flutter and dolphin kick. The added resistance of the fins will reinforce proper kick mechanics and help increase your flexibility.

3) Reduces Shoulder Stress

Swimming is a very low-impact sport compared to land-based physical activity, but your shoulders still take a beating! With so much repetitive movement, the shoulders are bound to give out if you push too hard. We recommend adding a strength training component to your swim program. Start your personalized training plan in the MySwimPro app!

In addition to strength training out of the water, adding a pair of fins to your workout will lessen the impact on your shoulders and allow you to work on technique.

Related: Shoulder Surgery: How I Persevered

4) Improved Body Position

One of the key differentiators between swimmers of different levels (Olympic to novice) is body position in the water. When you watch an elite swimmer cruising through the water they look like a speedboat that was designed to maintain high elevation in the water. Most swimmers do not hold this body line, but fins can help.

Swimming with fins adds velocity to the stroke and also teaches the body how to swim faster on top of the water. This works with kicking as well – when you’re in streamline on your back or front, you’ll be able to holder a higher body line with the added propulsion of fins.

Related: How To Swim Faster With Fins

5) Improved Stroke Technique

Fins can help improve your mechanics in every stroke. The added propulsion and stability of fins allows you to focus on specific components of the stroke that you’re working on. Completing drills with fins gives you a realistic feeling of speed while isolating one part of the stroke.

Related: 5 Freestyle Drills for Beginner Swimmers

Fins also allow you to do more advanced drills you otherwise may not be able to do without fins. For example, single arm freestyle or backstroke is very difficult without the added propulsion of fins for most swimmers. This is a fantastic drill to work on balance and the arm pull for both freestyle and backstroke.

6) Increased Strength and Endurance

There’s no question you can swim faster with fins. Fins not only make you swim faster, but they also allow you to swim and kick for longer periods of time, building endurance.

Related: 30-Minute Tethered Swimming Workout

Muscle recruitment is at an all time high when you’re wearing fins, so they’re a great way to challenge your legs and build endurance for longer races.

7) More Efficient Workout

If you’re in a rush, fins allow you to get more work done in less time. Adding fins can push your body into a higher heart rate zone for longer in a shorter period of time. #SwimSmarter

Related: How to Use Fins in Open Water Swimming

8) It’s More Fun!

Swimming fast is fun! It’s also fun to mix up your workout with the added use of equipment like swim fins. For example if you do a set twice through, on the first round you can go ‘all natural’ and on the second round you can add a pair of fins, and swim even faster. There are a number of different ways you can vary workouts with fins. You’re only limited by your own creativity!

Related: How MySwimPro Helped Me Swim Again 12 Years Off

How To Choose Fins

When it comes to choosing a pair of fins, you have two main considerations: Fin length and flexibility.

Check out our gift guide for swimmers!

Fin Length

The length of your fin is the most important consideration when choosing fins because it can dramatically impact how they affect your stroke technique and speed. Traditionally, shorter fins are best for everyday kicking and swim training. Longer fins are better for working on underwater dolphin kick and learning body undulation.

Shorter fins give a more realistic feeling of speed and help refine stroke technique while delivering maximum cardiovascular conditioning. Longer fins allow you to go fast at a reduced kick tempo, which is often the opposite benefit you’re looking for.


At the end of the day (or workout), you need to be comfortable. Stiff fins can make you really fast, but also feel like bricks on your feet. This can cause muscle pain and fatigue. If the fins are too soft, they’ll bend too much when power is applied and you’ll have a reduced benefit. The right firmness and flexibility comes down to your preference and strength level.

Should I Wear Socks with My Fins?

If fins cause blisters for you, there are special socks designed to protect your feet. Ideally you don’t need to resort to these because you’ve found a pair that fits and isn’t too firm.

What About Positive Drive Fins?

These fins are suitable for all four competitive strokes. They have a unique ellipsoidal blade that allows you to have the correct kick propulsion for every style of kick: Dolphin, Flutter, and Breaststroke. These are a useful pair of fins to have in your equipment bag if you’re a breaststroker or Individual Medley swimmer. For butterfly or flutter kick, we recommend more traditional short/long fins.

(F)in Summary

It can be really hard to take your fins off after a set or workout. It’s important not to rely on your fins, or any piece of equipment, too much.

If you’re a more experienced swimmer and you’re looking to get faster, keep your equipment usage to less than 50% of your total workout volume. Some days you may go over and other days you’ll be under, but keep an eye on how often you’re using your equipment and it will make a big difference in your ability to transition your swimming toys on and off.

Don’t be afraid to use multiple pieces of equipment together in sets. Use your fins to help improve ankle flexibility, develop a more balanced kick, fix your body positioning in the water, and of course, drown the swimmers in the next lane with your massive wake.

For more swim tips and Workouts, download the MySwimPro app! Each MySwimPro Workout includes notes with suggested equipment to help you make the most of each Set. Use code SWIM35 for $35 off your first year of MySwimPro Coach >



  1. Michael Metzger on

    Fins are great for beginners, as they take a few factors out of learning free (e.g. effort to move forward and keep legs on top of water) and allow learner to focus on breathing, for example.

    • I have been looking for a set of pool training fins but can’t find a pair in size 14 US Men’s. Given the size of many of the best swimmers, there must be larger size fins out on the market. I have not been able to find them.

  2. Thanks for the information well we haven’t got a variety of fins here in Cape town
    .I wish we had different designs of them but certainly do help in my long distance training..
    Thanks chief

  3. A dip in the cool waters of the swimming pool is on the must-do list of most of us. We know you would rather swim in the pool than do any other workout. But do you know you can enhance your workout efforts several notches higher if you workout against the resistance of water? Yeah, that’s right, try the effective swimming pool workouts to lose body fat and watch the pounds just melt away. And working out in the water is so much fun and yes, less exhausting too!

  4. Pingback: 2019 Essential Swimming Gear For Triathlon

  5. Prior to my swim today, I was talking to a guy who had these fins that were joined to create one big fin to strengthen the core muscles…are these recommended for training purposes?

    • Taylor Holmes on

      Hi Gary,
      The fin you saw is called a monofin! Monofins can be useful to improve underwater dolphin kick and strengthen the legs and core. If you have a set of regular fins, they can work just fine for this purpose, too.

  6. Inspired to buy a new pair of shorter fins, so happy their comfortable on my size 13 triple E
    feet! hope to build / maintain some muscle mass as I turn 65 in November!

  7. Im 68 and just start learn freestyle a month ago. I use fins all time and love to swiming with fins on. Look like people in my age use fins a lots. Thank all for information.

  8. Pingback: Swimming fun with fins – Mari Ruddy

  9. I’m 63 and was a competitive swimmer back in the day. Am retired now and just got back in the pool. Forgot how great the water feels. I recently injured a knee. Just wondering are the fins bad for my knee? I’ve found both yea and nah via Google searches. Which is it? Thanks

    • Hi Jan, it depends! If your doctor says it’s ok, try swimming a few short sets with fins and see how it feels! If it hurts, you may need to work on strengthening your knees before using fins regularly.

  10. great article ! quick question… swimming with a broken pinky toe… thoughts on using fins ? would it protect the toe from moving ? as oppose to being limited to just using a buoy…

    • Taylor Holmes on

      Hi Elizabeth! We recommend checking with a healthcare provider based on your specific situation. However, in general fins might aggravate the broken toe. Kicking with fins doesn’t immobilize the feet or toes, so you might feel some pain!

  11. Swimming with fins has been a game changer for me! Not only have they helped me improve my technique and speed, but they’ve also added variety to my swim workouts. Using fins engages different muscle groups and gives me a great overall workout. Thanks for sharing all the benefits – I couldn’t agree more! – Alex Cool.

  12. Hello!
    I’m teaching a few classes of toddlers for 20 weeks or more now. Some of the toddlers are kicking with bended knees. I read your article above. I’m considering asking the parents to buy a pair of short fins from the local sports shop to use to correct this problem of what I call “bended-knees” kicking. What would be your advice?

Leave A Reply

This site uses Akismet to reduce spam. Learn how your comment data is processed.