A 2% drop in body water reduces endurance performance by up to 7%. Most rowers start every session already behind.
She drinks a coffee and a glass of water before a 6 AM practice. By the halfway point of a 90-minute row,
her stroke rate climbs but her split slows. She thinks it is fitness. It is dehydration — a 2% body-mass fluid
deficit that has reduced her cardiac output, raised her core temperature, and compromised her endurance
Body-weight-based fluid targets synced with training and environmental conditions.
Cheuvront & Kenefick (2014) demonstrated that endurance performance declines linearly with dehydration beyond
2% body mass, with impairments reaching 7% at modest deficit levels. For rowers, whose events demand
sustained power over 5.5–7 minutes (2k) or prolonged steady-state across 60–120 minutes of training, even mild
Sweat rate in rowers varies enormously: 0.5 L/hour in cool conditions to 2.0+ L/hour in summer training. Individual
“Water is not a supplement — it is the medium in which every metabolic reaction in your body takes place. Dehydrate and you slow every process that makes you fast.”
— Noah Wickliffe, Flowbase
The Flowbase AI Coach calculates your personal fluid targets based on body weight, training duration, intensity,
and environmental conditions. It prompts pre-session hydration, tracks your weight deltas session to session, and
The Flowbase AI Coach turns research into personalized guidance.
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