Hydration for Rowers — SportsFlow Research

The Story

Composite Portrait

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.

This is a composite portrait. No individual is depicted.

SECTION I

What the Research Tells Us

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

Dehydration Cascade

2% Loss

Performance begins to drop

➔

3% Loss

Cognitive function impaired

➔

5% Loss

Serious performance deficit

➔

7%+ Loss

Medical emergency risk

Hydration Protocol

Condition	Fluid	Electrolytes	Warning
Pre-Training	500 mL 2h before	Optional	Dark urine
During <60m	Sip as needed	Not required	Dry mouth
During >60m	400-800 mL/hr	Na 300-600 mg/hr	Cramping
Post	1.5x fluid lost	Full mix	Wt loss >2%

sustained power over 5.5–7 minutes (2k) or prolonged steady-state across 60–120 minutes of training, even mild

body mass

at modest deficit levels

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

SECTION II

How the Flowbase AI Coach Helps

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

References

[1]Cheuvront, S.N. & Kenefick, R.W. (2014). Dehydration: physiology, assessment, and performance effects. Compr. Physiol., 4(1), 257–285.

[2]Baker, L.B. (2017). Sweating rate and sweat sodium concentration in athletes. Sports Med., 47(S1), 111–128.

[3]Goulet, E.D.B. (2012). Dehydration and endurance performance. Nutr. Rev., 70(11), 623–627.

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