Four Trainings a Week, and a Sports Drink at Every One

Quick answer: Sports drinks are acidic, and exercise makes their effect worse — heavy breathing dries the mouth, saliva flow drops, and the acid sits on the teeth with nothing to neutralise it. For most amateur athletes, water does the same hydration job without the damage.

The call

He was there about a chipped tooth from a training session. The chip took four minutes. The rest of the examination took considerably longer.

Amichai, 16, from Moshav Ta'oz, played competitive football — four trainings and a match most weeks. Talented, committed, and drinking two isotonic sports drinks at every session for about three years.

What we found

Erosion, in the pattern that goes with drinking rather than reflux: the outer surfaces of the upper front teeth thinned and glossy, translucent biting edges, and cupping on the biting surfaces of the first molars.

Two composite restorations placed two years earlier were standing slightly proud of the surrounding enamel — the reliable sign that tooth substance has been lost around them.

Sensitivity to cold, which he had assumed was normal.

No decay. Good brushing. This was entirely chemical.

Why sports drinks are worse than their sugar content suggests. Most isotonic and energy drinks sit at a pH of around 3, which is well below the level at which enamel dissolves. The acid is citric or phosphoric, added for taste and stability, and it is present in the sugar-free versions too.

Why exercise multiplies it, which is the part that is specific to athletes and is rarely explained:

• Saliva flow drops during exertion, sometimes substantially. Saliva is what buffers acid back to neutral; without it, the acidic period is far longer.
• Mouth breathing during hard exercise dries the teeth directly.
• Dehydration reduces saliva further.
• The drinking pattern is the worst possible one — small sips repeatedly across ninety minutes, which keeps the mouth continuously acidic rather than allowing recovery.

So the same bottle drunk at a desk does less damage than the same bottle drunk during a training session.

The performance question, which had to be answered honestly or the advice would be ignored. Isotonic drinks have a genuine role — for endurance exercise beyond about an hour, in heat, where carbohydrate and electrolyte replacement affects performance. For a ninety-minute football training with breaks, in a well-fed sixteen-year-old, water does the same job. Telling an athlete that his drink is useless when it is not would have lost him.

What we did

Baseline casts and photographs, so progression could be measured rather than guessed at.

A hydration plan he agreed to, built around not compromising anything he cared about:

• Water during training, in a bottle he refills, drunk rather than sipped continuously.
• The sports drink kept for matches and long sessions, where he believed it helped — one, drunk in a few minutes at half-time rather than across the whole game.
• Rinse with plain water immediately after any acidic drink.
• Milk or plain water afterwards, not another sports drink.
• No brushing for an hour after training. Enamel softened by acid and dried by mouth breathing is at its most vulnerable to abrasion, and brushing straight after training was part of his routine.

High-fluoride toothpaste at night and fluoride varnish every four months.

A custom mouthguard, which he was not wearing. That addressed the chipped tooth that brought him in, and it turned out he had chipped a different tooth the previous season too.

The outcome

Casts at twelve months showed no measurable further loss. Sensitivity resolved within about two months.

The enamel already lost has not returned. He will need composite restorations to the front edges at some point, probably in his twenties, and the wear has stopped.

He plays with a mouthguard and has not chipped a tooth since.

What to do if this happens to you

1. Ask whether you actually need a sports drink. Under an hour, in temperate conditions, usually not.
2. Drink it in one go, not sipped across a session. Duration is what does the damage.
3. Rinse with water afterwards, every time.
4. Do not brush for an hour after training.
5. Look for restorations standing proud of the tooth surface. It is the clearest early sign.
6. Wear a custom mouthguard for any contact sport, at training as well as matches.

Young athlete with sensitive or worn teeth? Ramat Beit Shemesh Urgent Dental Care looks at what they drink and when. 055-985-8845 · WhatsApp https://wa.me/972559858845 · Harav Kook 28/1, Beit Shemesh

This is a composite clinical story. It reflects a presentation we see regularly in Beit Shemesh and Ramat Beit Shemesh; the name and details are illustrative and are not those of a real patient.