Six exercises for swimmers, with a stretch cord and hand paddles. Each one has a drawing, a start position and a movement.
For each exercise, do 3 sets of 10 to 15 repetitions per arm. With the Medium (green) cord, 3 sets of 10 per arm is already plenty. Not set up yet? Here is how, in two minutes.
1. Crawl pull

Start (1). Bend forward at the hips. Your arms are stretched out and the cord is taut.
Move (2). Make crawl movements: bend your elbows and pull back. Then release back to the start.
2. Arms together

Start (1). The cord is taut and hangs behind you. Stretch your arms out to the sides, level with the floor.
Move (2). Keep your arms straight and bring them together in front of you. Then release back to the start.
3. End of the stroke

Start (1). Bend forward at the hips. Your elbows are bent and stay close to your body, and the cord is taut.
Move (2). Push your hands back along your body, all the way to your thigh. This copies the end of the freestyle push. Then release back to the start.
4. Forearm across

Start (1). Put your left arm behind your back. Bend your right arm, with the paddle, at 90°, elbow against your body, and keep the cord taut.
Move (2). Move from right to left. Your elbow stays against your body and only your forearm moves. Then do the other arm.
5. Forearms at shoulder height

Start (1). The cord is taut and attached to a fixed point behind you. Raise your arms to shoulder height with your elbows bent at 90° (the grey position). Keep your arms at shoulder height.
Move (2). Keep your elbows bent at 90°. Only your forearms move.
6. Forearm lift

Start (1). The cord is taut behind you. Let your arms hang along your body, palms facing forward.
Move (2). Lift your forearms upward. Your elbows stay against your body. Then lower them back to the start.
Safety
Check the cord and the loop for wear before every use, use a solid anchor, and stop if something hurts. Talk to a qualified professional before you start a new program.