This article discusses some aspects of the swimming technique in backstroke, and more specifically body position, body roll, and head position.
In backstroke, you float on your back in the water. Your body is almost horizontal, with a slight tilt toward the feet.
This slight tilt allows you to flutter kick without your legs breaking the water surface.
Beginners often have trouble getting into or maintaining this horizontal position.
Their hips and legs sink, and the whole body gets dragged down. The face drops below the water surface, and breathing is disrupted.
Causes for Sinking Legs
Having your hips and legs sink while swimming backstroke can have the following causes:
1) You don’t lean back enough in the water.
Leaning back presses your lungs down in the water.
As your lungs are the most buoyant part of the body, pressing them down causes your hips and legs to rise because your body acts like a seesaw as long as it is kept straight.
The head-lead supine balance drill has more explanations about this technique.
2) You don’t keep your body straight but bend at the hips.
This is often the case for certain swimmers where their kick is more akin to a bicycle kick rather than a flutter kick.
Ideally, your hips and knees should only bend a little while flutter kicking.
As explained above, if you don’t keep your body straight, it will be difficult for you to lean back and use the buoyancy of your lungs to raise your hips and legs.
While swimming backstroke, your body should roll from side to side, between 30° and 45° from a flat position.
Your body rolls toward the side of the recovering arm as it is about to enter the water, while the other arm is about to leave the water at the end of the underwater arm sweep.
Rolling from side to side allows you to use your chest and back muscles in addition to your shoulder muscles, hence increasing propulsion.
Rolling from side to side also decreases strain on your shoulders, making them less likely to develop the swimmer’s shoulder injury.
Please note that backstroke swimmers often roll too little rather than too much.
So you can try to roll more to the side than usual to see if this improves the grip of your arms in the water.
Whereas your body rolls from side to side during the backstroke swimming cycle, your head stays in a fixed neutral position.
It is in line with the trunk and neither tucked in nor rolled forward. Your face is above water, and you look straight up or slightly backward.
Some coaches use the following backstroke drill to practice a neutral head position: they have their swimmers swim backstroke with a small bottle of water placed on their forehead.