# Swimming and Strength Training: Combining Them Well

> Swimming barely tires the legs but works the shoulders hard. How to plan the week, which exercises to favour and which to dose carefully.

- Source: [Musku](https://musku.app/), free strength training tracker for iPhone and Android
- Canonical URL: https://musku.app/blog/swimming-and-strength-training
- Published: 2026-11-10
- Updated: 2026-11-10
- Level: Beginner, Intermediate
- Language: English
- French version: https://musku.app/fr/blog/natation-et-musculation
- Author: Musku (Julien Legrand)

_Informational content: this is not a substitute for medical advice. Check with a doctor before starting a training program, especially if you have a health issue or any pain._

Swimming has a reputation as a complete sport, gentle on the joints and compatible with almost anything. That is largely true. Combined with strength training, though, it raises a question that cycling or running does not: the shoulders, which work hard in the water and just as hard in the gym.

## What swimming really works

In front crawl, backstroke or butterfly, most of the propulsion comes from the upper body. The lats, shoulders and triceps do most of the work, with constant core engagement to keep the body aligned. The legs contribute, especially in breaststroke, but far less than in running or cycling.

Two consequences for lifting:

- **The legs stay fresh.** A swim, even a hard one, barely affects a squat or deadlift session the next day.
- **The shoulders accumulate fatigue.** Several kilometres of crawl add up to thousands of shoulder rotations, on top of the presses and pulls in the gym.

## What strength training gives a swimmer

**More strength in the water.** Pulling exercises strengthen the muscles that drive a swimmer forward. Almost all elite swimmers lift alongside their pool work.

**Better balance around the shoulder.** Swimming strongly develops the muscles that pull the arm forward and down. Strengthening those that stabilise the shoulder blade and draw it back helps balance the joint.

**Loading for the bones.** In the water the body is supported. Swimming therefore does very little for bone density, unlike loaded exercises such as squats or deadlifts. For a regular swimmer, that is one of the best arguments for lifting.

**Stronger legs**, useful for starts and turns, and often underdeveloped relative to the upper body.

## Organising the week

The rule differs from cycling or running. It is not the leg session you need to keep away from endurance work, it is the **upper body pushing and pulling session**.

| Situation | Recommended layout |
| --- | --- |
| Leg session | Compatible with swimming the day before or after |
| Heavy upper body session | Kept away from a hard or long swim |
| Swimming and lifting on the same day | Lifting first if strength is the priority, several hours apart |
| Easy swimming | Usable as recovery on rest days |

A swim at a moderate pace can even serve as active recovery: it gets blood moving without loading the legs. The general principle is covered in our article on [cardio and lifting](https://musku.app/blog/cardio-and-strength-training).

## The exercises to favour

| Exercise | Value for a swimmer |
| --- | --- |
| Pull-ups and lat pulldowns | Propulsive strength |
| Rows, seated cable rows | Shoulder blade retraction, shoulder balance |
| Face pulls, rear delt flyes | The back of the shoulder, often undertrained |
| Band external rotations | Shoulder stability |
| Squats, deadlifts, lunges | Legs and bone loading |
| Core work | Body alignment in the water |

Pull-ups are an excellent exercise for swimmers, provided you progress in stages, as our article on [pull-ups](https://musku.app/blog/pull-ups-zero-to-ten) explains.

## The exercises to dose carefully

**Overhead presses.** The overhead press is not off limits, but it adds strain to a joint that is already heavily used. If you swim a lot, keep the volume moderate and prefer dumbbells, which let the shoulder find its own path.

**Total pulling volume.** Pulls are useful, but they work the same muscles as swimming. Count both in your week rather than stacking ten sets of pulling on top of four kilometres of crawl.

**Deep dips**, which put the shoulder into marked extension under load.

Pain at the front or top of the shoulder that appears while swimming or lifting, lasts several days or wakes you at night deserves to be examined by a health professional, rather than just managed by cutting the load.

## A question of priority

If swimming is your main sport, two strength sessions a week are enough, focused on strength, shoulder balance and the legs. If lifting comes first, one to three moderate swims fit in easily, as long as you keep an eye on shoulder fatigue.

## Frequently asked questions

### Does swimming make you lose muscle?

No, at moderate volume and with enough food. It can even help maintain upper body mass. Very high volume without enough intake can, however, hold back gains.

### Can you swim on a lifting day?

Yes. After a leg session, no problem at all. After a heavy upper body session, keep the pace easy and the distance moderate.

### Can swimming replace strength training?

For fitness, largely. For strength, muscle gain and bone density, no: the water supports the body and the loads stay low.

### Should swimmers avoid the overhead press?

Not necessarily. Keep the volume moderate, favour dumbbells, and reduce or replace the exercise if your shoulder becomes sensitive.

Combining two activities that load the same shoulders means seeing both together. In Musku you can log your swims as cardio exercises, with distance and duration, alongside your strength sessions. The activity calendar then shows your full week, and the history of your pulls and presses lets you check whether a dip in load coincides with a heavier week in the pool.