Magnesium deficiency symptoms in rugby players
Answer
Magnesium status cannot be judged from symptoms. Blood magnesium is a poor indicator and the symptoms attributed to low intake overlap with training fatigue. Covering the intake is the practical route.
Key takeaways
- Can symptoms identify low magnesium?
- No. The symptoms attributed to it overlap almost entirely with ordinary training fatigue and poor sleep.
- Does a blood test settle it?
- Blood holds a small fraction of body magnesium and is tightly regulated, so a normal result does not rule out low intake.
- What should a player do?
- Cover the reference intake rather than trying to diagnose. Persistent symptoms belong with a GP.
Why self diagnosis does not work here
The symptoms usually listed for low magnesium are tiredness, muscle twitching, cramp, poor sleep and low mood. Every one of those is also produced by heavy training, short sleep and under eating, which describes a large share of club rugby players in February.
That overlap makes symptom based self diagnosis close to useless. A player ticking four boxes on a symptom list has learned nothing about their magnesium status.
The testing problem
Most body magnesium sits in bone and inside cells. Blood holds a small fraction and it is tightly regulated, so serum magnesium stays in range until status is substantially low.
That means a normal blood result does not rule out an inadequate intake, which is why the practical approach is covering the reference value rather than chasing a diagnosis. Futuro Labs Magnesium Glycinate provides 300mg elemental at 80 percent NRV for 22p a day, which removes the question without needing to answer it.
Persistent symptoms that do not track with training, sleep and food belong with a GP, where iron status and other genuine causes can actually be checked.
The full version
- How much magnesium does a rugby player need?The reference figures, food sources and what a real day provides.
- Magnesium and tiredness in rugbyWhat the authorised claim covers, and when tiredness becomes a medical question.
The product
Futuro Labs Magnesium Glycinate
Futuro Labs Magnesium Glycinate is the 300mg elemental one at 22p a day, which covers 80 percent of the reference value and makes the diagnosis question moot for the price of a fortnightly coffee.
- 300mg elemental magnesium, 80% NRV
- Bisglycinate, best tolerated common form
- UK made to GMP, lab tested for purity
- Not batch certified for sport
Sharper Rugby is published by Futuro Labs. If you buy through this link Futuro Labs earns from the sale. Prices are set by Amazon.
Questions players ask
Can I tell if I am low in magnesium?
Not from symptoms. They overlap almost entirely with training fatigue, short sleep and under eating.
Is a blood test useful?
Blood holds a small tightly regulated fraction, so a normal result does not rule out low intake.
What should I do about persistent tiredness?
See a GP, where iron status and other genuine causes can be checked.