New research suggests that gum and tooth disease might do more than cause pain — it could blunt athletes’ aerobic performance. Low-grade inflammation from common oral conditions such as gingivitis and periodontitis appears to impair red-blood-cell production and mitochondrial function, both critical for oxygen delivery and endurance.
That inflammation is widespread among athletes. One study cited by researchers found gingival inflammation in 76% of elite runners and active tooth decay in 55%. Another analysis reported that elite athletes with gingivitis had a roughly 5% lower VO2 max than peers without gum disease — a meaningful deficit for high-level performance.
Oral inflammation may also hamper recovery. Elevated inflammatory markers linked to gum disease have been associated with increased delayed-onset muscle soreness (DOMS), which can reduce readiness for subsequent training sessions.
Sports drinks are a particular concern. A 2021 study found frequent consumption of sports beverages raised the odds of dental erosion by about 2.5 times. Erosion is irreversible and can compound the long-term dental toll for active people who sip acidic, sugary drinks throughout training.
Oral-health expert and ultrarunner Ian Needleman recommends practical changes to protect teeth while fuelling performance:
Skip sports drinks for runs under an hour. They’re often unnecessary.
Use a two-bottle strategy in races: one with sports fuel, one with water to rinse afterward.
Minimize exposure: swallow quickly rather than sipping over long periods, and consider a straw.
See a dentist twice a year and disclose sports-drink use so damage can be caught early.
If damage is present, ask about prescription high-fluoride toothpaste for added protection.
For post-exercise recovery, consider milk as a tooth-friendly alternative to sports drinks.
The emerging evidence doesn’t replace training or nutrition guidance, but it adds a new dimension to athlete care: maintaining oral health may be a small change with measurable effects on oxygen delivery, recovery and ultimately performance.
