page_title: Treading water
hierarchical_section_title: Treading water
caption_attribution_description: English: Students of the Marine Combat Instructor Water Survival Course tread water in formation while carrying the rifle at port arms as part of water aerobics at the Camp Schwab Aquatic Center June 14. Water aerobics sessions are part of the conditioning and strengthening portion of the course and consist of swimming different strokes above water and underwater, strength-training activities in the water, and exercises along the edges of the pool.
context_page_description: Treading water or water treading is what a swimmer can do while in a vertical position to keep their head above the surface of the water, while not providing sufficient directional thrust to overcome inertia and propel the swimmer in any specific direction. As it expends less energy than traditional strokes, it is often used by swimmers to rest between periods of exertion without having to leave the water.
  As such, the phrase "treading water" has become a euphemism for an effort expected to create motion, but which actually results in merely staying in one, possibly barely sustainable, place.
context_section_description: Treading water or water treading is what a swimmer can do while in a vertical position to keep their head above the surface of the water, while not providing sufficient directional thrust to overcome inertia and propel the swimmer in any specific direction. As it expends less energy than traditional strokes, it is often used by swimmers to rest between periods of exertion without having to leave the water.
  As such, the phrase "treading water" has become a euphemism for an effort expected to create motion, but which actually results in merely staying in one, possibly barely sustainable, place.
caption: U.S. Marines treading water in formation while carrying a rifle during a water survival course in July 2005
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