Jeremy Laurance: Mild uppers and downers unlikely to explain lacklustre performance next day

 

Caffeine is the world's most widely used performance-enhancing drug. Sportsmen and women use it, students use it, long-distance drivers use it. "Nature's stimulant" improves short-term memory, boosts muscle power and increases alertness. An average cup of filter coffee contains 100mg of caffeine and millions are drunk each day. It is also in tea, cola and chocolate.

The England team could have opted for a strong sup of coffee before the original Poland match on Tuesday. Instead, some are said to have taken ProPlus pills, which contain 50mg of caffeine each. The instructions say take one or two with water and no more than two in any hour – but users tend to ignore instructions. As every coffee drinker knows, a strong brew drunk in the evening is liable to disturb sleep. The same goes for ProPlus pills. If the England footballers had played and ended their game as scheduled at 10pm there would have been no harm done. With them fired up after the match and adrenalin levels high, sleep would probably have been a distant prospect anyway.

With the game postponed but the caffeine already surging round their system, at least one player apparently turned to sleeping pills to come down again. The combination is unlikely to have done any harm – some clubbers enjoy its zombie effect – but it is not to be recommended on a regular basis.

Could this have explained the lacklustre showing the following day? Unlikely. Chronic lack of sleep does damage performance but a single bad night would be unlikely to do so.

Modern sleeping pills have a short half-life – meaning they are rapidly metabolised by the body, leaving no after-effects next morning. In older people there may be a hangover but young, fit footballers should wake from a pill-induced sleep fresh, alert and ready to go.

Suggested Topics
Have you tried new the Independent Digital Edition apps?
Caption competition
Caption competition
Latest stories from i100
Have you tried new the Independent Digital Edition apps?

Bleacher Report

Daily Quiz
SPONSORED FEATURES
Independent Dating
and  

By clicking 'Search' you
are agreeing to our
Terms of Use.

Day In a Page

Turkey-Kurdish conflict: Obama's deal with Ankara is a betrayal of Syrian Kurds and may not even weaken Isis

US betrayal of old ally brings limited reward

Since the accord, the Turks have only waged war on Kurds while no US bomber has used Incirlik airbase, says Patrick Cockburn
VIPs gather for opening of second Suez Canal - but doubts linger over security

'A gift from Egypt to the rest of the world'

VIPs gather for opening of second Suez Canal - but is it really needed?
Jeremy Corbyn dresses abysmally. That's a great thing because it's genuine

Jeremy Corbyn dresses abysmally. That's a great thing because it's genuine

Fashion editor, Alexander Fury, applauds a man who clearly has more important things on his mind
The male menopause and intimations of mortality

Aches, pains and an inkling of mortality

So the male menopause is real, they say, but what would the Victorians, 'old' at 30, think of that, asks DJ Taylor
Man Booker Prize 2015: Anna Smaill - How can I possibly be on the list with these writers I have idolised?

'How can I possibly be on the list with these writers I have idolised?'

Man Booker Prize nominee Anna Smaill on the rise of Kiwi lit
Bettany Hughes interview: The historian on how Socrates would have solved Greece's problems

Bettany Hughes interview

The historian on how Socrates would have solved Greece's problems
Art of the state: Pyongyang propaganda posters to be exhibited in China

Art of the state

Pyongyang propaganda posters to be exhibited in China
Mildreds and Vanilla Black have given vegetarian food a makeover in new cookbooks

Vegetarian food gets a makeover

Long-time vegetarian Holly Williams tries to recreate some of the inventive recipes in Mildreds and Vanilla Black's new cookbooks
The haunting of Shirley Jackson: Was the gothic author's life really as bleak as her fiction?

The haunting of Shirley Jackson

Was the gothic author's life really as bleak as her fiction?
Bill Granger recipes: Heading off on holiday? Try out our chef's seaside-inspired dishes...

Bill Granger's seaside-inspired recipes

These dishes are so easy to make, our chef is almost embarrassed to call them recipes
Ashes 2015: Tourists are limp, leaderless and distinctly UnAustralian

Tourists are limp, leaderless and distinctly UnAustralian

A woefully out-of-form Michael Clarke embodies his team's fragile Ashes campaign, says Michael Calvin
Blairites be warned, this could be the moment Labour turns into Syriza

Andrew Grice: Inside Westminster

Blairites be warned, this could be the moment Labour turns into Syriza
HMS Victory: The mystery of Britain's worst naval disaster is finally solved - 271 years later

The mystery of Britain's worst naval disaster is finally solved - 271 years later

Exclusive: David Keys reveals the research that finally explains why HMS Victory went down with the loss of 1,100 lives
Survivors of the Nagasaki atomic bomb attack: Japan must not abandon its post-war pacifism

'I saw people so injured you couldn't tell if they were dead or alive'

Nagasaki survivors on why Japan must not abandon its post-war pacifism
Jon Stewart: The voice of Democrats who felt Obama had failed to deliver on his 'Yes We Can' slogan, and the voter he tried hardest to keep onside

The voter Obama tried hardest to keep onside

Outgoing The Daily Show host, Jon Stewart, became the voice of Democrats who felt the President had failed to deliver on his ‘Yes We Can’ slogan. Tim Walker charts the ups and downs of their 10-year relationship on screen