Breaststroke and Butterfly. The butterfly requires hip-action for leverage. Photo Credit Swimmer image by PhotoMan from Fotolia.com. Breaststroke and butterfly require lifting your head out of the water to breath, an action that depends largely on arm and leg power, not neck-strength.
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Using these assumptions 300 gallons can be multiplied by 7 to get the weekly total and dived by 2 to get the weekly total for one irrigation cycle. One irrigation cycle can be divided by the assumed 90 minutes of irrigation to acquire the minutes per a gallon for an irrigation cycle. This value also assumes that a rain sensor shut device is present. 300 gallons per single family household per day Ã 7 days = 2100 gallons per week.