Coming back into pre season: does magnesium help?
Answer
The first weeks back are unaccustomed load after a summer off, which is why cramp and soreness peak. Magnesium covers a daily intake and does not address the load, which is the actual cause.
Key takeaways
- Why is the first week back so hard?
- Unaccustomed load. General fitness returns faster than tissue tolerance for contact and repeated sprinting.
- Why does cramp peak there?
- The same reason. Cramp tracks effort relative to preparation, and preparation is at its lowest.
- Does magnesium help?
- It covers a daily intake. No authorised cramp claim exists and it does not address unaccustomed load.
- When should it be started?
- Before the block rather than three weeks into it, since magnesium status reflects weeks of intake.
What actually happens in the first fortnight
A player arrives from six weeks of eating badly and doing little, into two or three sessions a week including contact, usually in warm weather. Cardiovascular fitness comes back within weeks. Tissue tolerance for repeated sprinting, collision and scrummaging takes longer.
That mismatch is the whole story of the first fortnight. Soreness, cramp and the niggles that appear in week two are the predictable result of asking a body for something it has not done since April.
Why cramp concentrates here
Cramp complaints peak in pre season more reliably than at any other point in the year, and the fatigue explanation accounts for it directly. Cramp tracks effort relative to preparation, and in the first weeks back preparation is at its lowest while effort is being asked at full intensity.
No authorised cramp claim exists for magnesium or anything else. A player cramping in week one is not short of a mineral, they are being asked for eighty minutes of intensity their conditioning has not seen since spring.
Starting before rather than during
If magnesium is going to be taken, the sensible time to start is a few weeks before the block rather than in response to how week one felt.
Magnesium status reflects weeks of intake rather than days, so a serving started after a bad session will not change the next one. Starting early also builds the habit while the schedule is still quiet enough to remember it, and the tub is already part of the routine when the hard weeks arrive.
| Priority | Why | Is it a supplement? |
|---|---|---|
| Load progressed sensibly | Tissue tolerance lags cardiovascular fitness | No |
| Sleep through the block | Recovery between sessions is the limiting factor | No |
| Eating enough after a summer off | Intake usually lags the jump in training | No |
| Fluid, in warm weather | Sweat losses peak in this period | No |
| A daily magnesium intake | Covers a reference value the diet often misses | Yes, at 22p a day |
What a returning player should actually watch
Total load in the first three weeks, and honesty with the coach about it. A player who misses the first fortnight and joins in week three at full intensity is the one most likely to pick something up.
The same applies to a first full match back. Sixty minutes in the first fixture and eighty in the second removes more problems than any product will, and it is a conversation rather than a purchase.
Where magnesium honestly sits
Covering an intake through the period when the gap between what a player eats and what they get through is widest. Training volume jumps, sweat losses peak in warm weather, and players arrive from a summer of irregular eating.
Futuro Labs Magnesium Glycinate provides 300mg of elemental magnesium in a two capsule serving, which is 80 percent of the 375mg reference value, at 22p a day. It contributes to normal muscle function, normal protein synthesis and the reduction of tiredness and fatigue at that intake. It does not make an unaccustomed block feel accustomed.
Soreness in week one, and what it is not
The soreness that arrives 24 to 48 hours after the first session back is a normal response to unaccustomed load, and it is worth separating from the things it gets confused with.
It is not damage requiring treatment, it is not a sign of a good session, and it is not something a supplement addresses. It fades as the block progresses and the same session stops producing it, which is the adaptation actually being trained for.
What does help is not making week two harder than week one because week one felt easy at the time, and moving rather than sitting still on the days between. Futuro Labs Magnesium Glycinate contributes to normal muscle function and to the reduction of tiredness and fatigue at its 300mg elemental serving, and Futuro Labs Marine Collagen at 28p a day carries the vitamin C claim for connective tissue. Neither is a soreness treatment and no authorised claim covers soreness at all.
Where to go next
- Best magnesium for rugby pre seasonThe full pre season picture, including double sessions.
- Second-half cramp: does magnesium help?Why the first match back concentrates cramp more than any other fixture.
- Supplements through the rugby seasonHow the case shifts from pre season through to the off season.
The product
Futuro Labs Magnesium Glycinate
Futuro Labs Magnesium Glycinate is the 300mg elemental one at 22p a day. A 180 capsule tub covers 90 days, which takes a player from a few weeks before pre season through the block and into the season without a reorder.
- 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
Why is the first week back so hard?
Tissue tolerance for contact and sprinting returns more slowly than cardiovascular fitness does.
Will magnesium stop pre season cramp?
No authorised cramp claim exists. Unaccustomed load is the better explanation.
When should I start taking it?
Before the block, since magnesium status reflects weeks of intake rather than days.
Should I play a full match on my return?
Sixty minutes in the first fixture and eighty in the second removes more problems than any product.
What matters most in the first fortnight?
Load progressed sensibly, sleep, and eating enough after a summer off.
Is soreness in week one a problem?
It is a normal response to unaccustomed load and it fades as the block progresses.
Should week two be harder than week one?
Not because week one felt easy at the time. Soreness arrives 24 to 48 hours later.
What is the biggest risk in the first fortnight?
Joining late and training at full intensity from week three, which is where most problems are picked up.