The Secret Life of Your Bodyclock | Horizon

Duration: 49'21''

Synopsis

Why are people more likely to have a heart attack at eight in the morning or crash their car on the motorway at two in the afternoon? The answer lies in our biological clock.

Further Information

More clips from 2008-2009

Brain injuries and aggression | Horizon

Brain injuries and aggression | Horizon

BBC Two | 2009 | 2'24''

An example of how brain injuries can lead to changes in personality and increased aggression.

How Mad Are You? Part 1 | Horizon

How Mad Are You? Part 1 | Horizon

BBC Two | 2008 | 59'04''

Ten volunteers have come together for an extraordinary test. Five are 'normal' and the other five have been officially diagnosed as mentall...

How Mad Are You? Part 2 | Horizon

How Mad Are You? Part 2 | Horizon

BBC Two | 2008 | 59'00''

With five 'normal' volunteers and five who have been officially diagnosed as mentally ill, Horizon asks if you can tell who is who.

How Violent Are You? | Horizon

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BBC Two | 2009 | 58'18''

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Milgram's obedience study | Horizon

Milgram's obedience study | Horizon

BBC Two | 2009 | 14'21''

Watch a modern replication of Milgram's famous obedience study and see how the participants react to the situation.

Reinforcement and aggression | Horizon

Reinforcement and aggression | Horizon

BBC Two | 2009 | 5'27''

Michael Portillo investigates the role of socialisation and reinforcement of aggression in different cultures.

The difficulty of diagnosis | Horizon

The difficulty of diagnosis | Horizon

BBC Two | 2008 | 7'32''

Mental health professionals are trying to distinguish sane from the insane and highlights the complexity of diagnosis.

More resources about Biological rhythms

1: Get Thin Fast | The Twinstitute

1: Get Thin Fast | The Twinstitute

BBC Two | 2019 | 28'53''

Identical twins put competing health theories to the test. This episode tests the best way to lose weight, improve memory and beat pain wi...

2: Sleep Deprivation | The Twinstitute

2: Sleep Deprivation | The Twinstitute

BBC Two | 2019 | 28'59''

Identical twins put health theories to the test. Twins test the best way to beat fatigue and discover the effect of smartphones on IQ.

3: HIIT versus Easy | The Twinstitute

3: HIIT versus Easy | The Twinstitute

BBC Two | 2019 | 29'05''

This episode explores the best way to get fit, beat nausea, and discovers if you can enhance brain performance.

4: Better Brain | The Twinstitute

4: Better Brain | The Twinstitute

BBC Two | 2019 | 29'01''

Twins find out if its possible to get a better brain, repel mosquitoes and get fit just by watching TV!

5: Giving Up Smoking | The Twinstitute

5: Giving Up Smoking | The Twinstitute

BBC Two | 2019 | 29'05''

Twins test the best way to kick a habit, see if hand-washing keeps you healthy and try to improve concentration.

6: Learn a Language | The Twinstitute

6: Learn a Language | The Twinstitute

BBC Two | 2019 | 28'47''

Identical twins test the best way to learn a new language, attempt to look younger and test an easy way to lower your calorie count.

Beginning of the experiment | Horizon

Beginning of the experiment | Horizon

BBC Two | 2018 | 6'01''

The experiment begins with Aldo being isolated in a nuclear bunker away from people and outside influences.

How does lack of light affect our body clock? | Horizon

How does lack of light affect our body clock? | Horizon

BBC Two | 2018 | 6'06''

Aldo is now living in the bunker with very limited artificial light to see the effects on his body clock.

How easily do our body clocks keep time? | Horizon

How easily do our body clocks keep time? | Horizon

BBC Two | 2018 | 7'04''

Aldo is trying to keep track of time without any external cues in the bunker.

Running on Empty: The Secret of Sleep | Trust Me, I'm a Doctor

Running on Empty: The Secret of Sleep | Trust Me, I'm a Doctor

BBC Two | 2000 | 28'42''

Dr Phil Hammond discovers the physical and psychological effects of a lack of sleep, explores the problems of ...

Secrets of the Body Clock with Terry Wogan

Secrets of the Body Clock with Terry Wogan

BBC One | 2014 | 39'03''

Sir Terry Wogan discovers why timing is everything as he explores the human body clock, a ticking timepiece that lives in our brai...

The impact of jet lag | Horizon

The impact of jet lag | Horizon

BBC Two | 2018 | 6'53''

Experimenters are inducing jet lag by waking Aldo up several hours early, what will the impacts be?

The impact of shift work | Horizon

The impact of shift work | Horizon

BBC Two | 2018 | 5'38''

Couples who are struggling with their sleep are helped by a sleep expert.

The role of SCN and melatonin | Secrets of the Body Clock with Terry Wogan

The role of SCN and melatonin | Secrets of the Body Clock with Terry Wogan

BBC One | 2014 | 1'53''

Our body clock is explained in terms of the brain, the SCN, the hormone melatonin and the percepti...