Q.87 A swimmer is preparing to swim ‘non-stop’ across the English channel (a distance of 34 kilometers).
Consumption of which of the following category of food/s should the swimmer increase to
accomplish this feat?
(A) Proteins (B) Fats
(C) Proteins and Carbohydrates (D) Carbohydrates
Carbohydrates are the primary energy source swimmers should increase for endurance feats like a non-stop 34 km English Channel crossing.
This aligns with exercise physiology principles for prolonged aerobic efforts.
Correct Answer
(D) Carbohydrates
Option Analysis
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(A) Proteins: Proteins support muscle repair and growth but serve mainly as backup fuel during extreme fatigue. They aren’t ideal for immediate energy in sustained swimming, which relies on quick-access fuels to avoid fatigue.
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(B) Fats: Fats provide high energy density for ultra-endurance but mobilize slowly, better for events over hours where low intensity allows fat oxidation. Channel swims demand higher outputs, depleting glycogen first.
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(C) Proteins and Carbohydrates: While carbs are essential, pairing with proteins isn’t prioritized pre-event; proteins add little to acute energy needs and may slow digestion.
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(D) Carbohydrates: Carbs replenish muscle glycogen, the key fuel for 2-15 hour swims. Studies show 10-12 g/kg/day pre-event boosts performance by delaying depletion and stabilizing blood glucose.
Energy Demands in Channel Swimming
Channel swims last 8-18 hours at moderate-high intensity, burning 400-800 kcal/hour mostly from glycogen. Low-carb diets impair 365m freestyle times by 2-3%; carb-loading (10 g/kg/day for 48 hours) maximizes stores for non-stop efforts. During swims, 60-90 g/hour carbs (glucose:fructose 2:1) sustains output.
Swimmer English Channel Carbohydrates: Fuel for 34 km Non-Stop Success
For a swimmer tackling the English Channel‘s 34 km non-stop, swimmer English Channel carbohydrates become critical. This feat demands 10,000-15,000 kcal over 10+ hours in cold waters, where glycogen depletion causes “bonking.” Carbohydrates provide fast ATP via glycolysis and oxidative paths, essential for aerobic endurance.
Why Carbohydrates Over Proteins or Fats?
| Nutrient | Role in Endurance Swim | Limitation for 34 km Channel |
|---|---|---|
| Carbohydrates | Prime glycogen source; 1-4 g/kg pre-swim, 90 g/hr during | None – sustains high output |
| Proteins | Repair post-swim; minor gluconeogenesis fuel | Slow energy; risks muscle loss |
| Fats | Secondary for low-intensity | Slow mobilization; spares glycogen poorly here |
Swimmer English Channel carbohydrates strategy: Carb-load 10-12 g/kg/day 2-3 days prior, then gels/drinks mid-swim. This matches GATE Life Sciences emphasis on metabolic fuels.
Practical Tips for Swimmers
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Pre-event: Pasta, rice (8-12 g/kg); avoid fiber overload.
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During: 30-60 g/hr via sports drinks to spare glycogen.
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Recovery: 1 g/kg carbs + 20g protein/hour post-swim.
GATE aspirants note: This tests bioenergetics – carbs dominate moderate prolonged exercise.
