Hi there. This is Michelle McLafferty and this is how to strengthen your rhomboids with swimming. The rhomboid muscles connect your spine to your shoulder blades in your back. When you bring your arms out, pinch in the shoulder blades behind you, you are activating the rhomboid muscles. It's a really nice muscle for posture. So one of the best ways and easiest ways to tone the rhomboids is by using some resistance bands. You can bring this into the water and connect it to a bar like the bar as you walk into the pool, anywhere where you can get an anchor and you just want to bend your knee slightly, keeping your shoulder blades down and back, elbows are going to be drawing straight back and the key here is feeling the muscle behind your shoulder blades pinching together while you pull the elbows back, keeping your core and your abdominal muscles engaged, nice easy reps, controlling it as you eccentrically and concentrically contract, nice and smooth. This will help to strengthen the rhomboids and it's also a great cross training workout for swimming.