Sport during your period: how to avoid digestive troubles and perform calmly
82% of active women say they feel uncomfortable during training on their period. Cramps, fatigue… and digestive issues — often forgotten, always real.
The good news: with the right nutrition and the right menstrual gear, you can keep performing. Without compromise.
Why does menstruation disrupt
digestion during sport?
It’s not in your head. During your period, the body produces prostaglandins: molecules that trigger uterine contractions. Problem: these same substances also act on the smooth muscles of the digestive tract.
Result? Diarrhea, nausea, intestinal cramps — even without physical effort. Training amplifies all this.
- Blood flow redistribution: during exercise, blood flows to the muscles. The digestive system is less supplied, which slows digestion.
- Mechanical shocks: in running or trail, repeated impacts “shake” the intestinal contents. Unpleasant normally, dreadful during your period.
- Physiological stress: intense effort activates the sympathetic nervous system, which inhibits digestion and can cause urgent urges.
- Hormonal context: the drop in progesterone at the start of the cycle increases intestinal sensitivity and speeds up transit.
“During your period, your digestive system is more sensitive than usual. What you eat before and during exercise directly impacts your comfort — and therefore your performance.”
Adjust your nutrition:
before and during exercise
Before the session — focus on easy-to-digest foods
On period days, the goal is simple: provide energy without overloading an already stressed digestive system.
- Simple carbohydrates low in fiber: white rice, banana, white bread. Fiber speeds up transit — which you don’t need during your period.
- Avoid excess fats: they slow gastric emptying and make digestion heavier.
- Hydrate more: menstruation increases water needs. Starting dehydrated worsens cramps and fatigue.
- Natural energy sources: honey offers a natural blend of glucose and fructose, quickly absorbed, without harsh blood sugar spikes or irritating additives.
During effort — energy without the load
Maintaining energy during long effort while protecting a sensitive digestion: this is precisely the challenge of sports nutrition designed for endurance.
Highly sweetened industrial products cause blood sugar spikes followed by energy crashes — a phenomenon amplified during periods. The solution? Natural nutrition designed for the body under effort.
TO
NIC
Our nutrition partner
Meltonic — Natural sports nutrition with honey
Born from the beekeeping expertise of the Famille Mary — French beekeepers since 1921 — Meltonic develops a 100% natural sports nutrition range for endurance sports (running, trail, triathlon, cycling).
Their organic honey energy gels are especially suited for period days: easy to digest, free from irritating additives, they provide quickly available energy without upsetting a sensitive gut. Their antioxidant bars and drinks follow the same principle: natural, traceable, respectful of the body under effort.
Discover Meltonic →Menstrual protection:
the often underestimated factor
There’s a lot of talk about nutrition. Much less about gear. Yet the mental load of unsuitable protection — fear of leaks, feeling damp, constant adjustments — diverts precious energy from what matters most: performing.
This is exactly what SMOON solved with its technical menstrual underwear, designed for active women.
Moisture-wicking material
Immediately wicks away liquid. Instant dry feeling.
Antibacterial silver thread
Absorbs flow and neutralizes odor-causing bacteria.
Waterproof material
Protects against any leaks, even during intense effort.
Seamless
Flat bonding assembly. Zero friction, zero distraction.
All SMOON textiles are certified OEKO-TEX or GRS (Global Recycled Standard), sourced from French and Italian supply chains. Some come from innovative recycled materials — like yarn made from recycled heavy truck tires.
Collection
Our sports pieces
Build your performance routine:
sports + period + nutrition
Periods are not a contraindication for sports. Studies show that high-level women’s performance does not significantly vary according to their cycle phase.
What varies is subjective comfort — and that’s exactly what we can influence.
Before the session
- Light meal, low in fiber, simple carbohydrates
- Increased hydration before starting
- SMOON protection adapted to your flow and activity
During exercise
- Efforts > 45 min: Meltonic gel with organic honey
- Avoid industrial sugars (energy crashes)
- Listen to your body — reduce intensity if needed on days 1–2
After the session
- Anti-inflammatory snack (red berries, omega-3)
- Rehydration and active rest
- SMOON lingerie wash at 30°C — ready for the next one
Free your body and mind
to perform
Female performance during periods is first and foremost a matter of confidence. Confidence in your body, in your protection, in the fuel you give it.
SMOON and Meltonic share this belief: athletic women deserve solutions designed for them, not adaptations of products made for a body without a cycle.
One focuses on the outer layer — technical lingerie that follows every movement without giving away a thing. The other on the fuel — natural nutrition that respects a physiology long ignored.
How to do sports during your period without the period becoming the main topic? The answer is to anticipate. To equip. To nourish. And to run.
