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Supplementation Protocol

The Supplementation Protocol covers the three research-backed ergogenic aids that provide a measurable 1–2% performance edge in tennis — caffeine, creatine monohydrate, and dietary nitrates — and the safety imperative of third-party testing.

Supplements are "add-ons" to a solid glycogen foundation, not replacements for it.

The Three Supplements

1. Caffeine — Cognitive and Physical Catalyst

Mechanism: Caffeine is an adenosine receptor antagonist. Adenosine is the neurotransmitter that builds up during wakefulness and causes fatigue. By blocking adenosine receptors, caffeine reduces the perceived effort of exercise and delays "central fatigue" — the brain's signal to the body to slow down.

Tennis benefits: Studies show caffeine improves serve accuracy and agility specifically during the third set — the point at which cognitive fatigue begins significantly impairing performance. It is the cognitive dimension of the Performance Cliff that caffeine most directly addresses.

Protocol: 3mg per kilogram of body weight, taken 60 minutes before match time. This dosing maximises reaction time benefits without causing the jitters or thermoregulation interference that higher doses produce.

2. Creatine Monohydrate — The Sprint Battery

Mechanism: Creatine increases resting stores of phosphocreatine (PC) in the muscle. PC is the immediate energy substrate for the ATP-PC system — the pathway that powers 1–10 second explosive efforts (sprints, serves, explosive first steps).

Tennis benefits: Faster resynthesis of ATP between points — meaning the 50th sprint of the match can be as explosive as the first. This directly addresses the physical dimension of the Performance Cliff.

Protocol: 3–5g per day as a maintenance dose. No loading phase is required for players who have used it consistently.

3. Dietary Nitrates (Beetroot Juice) — Aerobic Efficiency

Mechanism: Dietary nitrates are converted into nitric oxide, which causes vasodilation (widening of blood vessels) and improves mitochondrial efficiency — muscles produce more ATP per unit of oxygen consumed.

Tennis benefits: Reduces the "oxygen cost" of exercise, allowing higher-intensity play for longer before the aerobic system triggers fatigue accumulation. Most relevant for extended baseline rallies and five-set matches.

Protocol: 500ml of beetroot juice (or a concentrated shot) consumed 2–3 hours before play to capture the peak nitric oxide spike.

The "Clean Sport" Warning

All three supplements must be third-party tested — certified by NSF for Sport or Informed-Sport. Contaminated supplements (containing prohibited substances at trace levels due to manufacturing cross-contamination) can result in anti-doping violations regardless of intent. This is not a marginal risk — contaminated supplements are a documented source of positive tests at elite level.

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