Understanding Jet Lag

Jet lag is a temporary sleep and energy disruption that occurs when your body clock becomes out of sync with a new time zone after travelling long distances. Your internal clock regulates sleep, digestion, mood and energy levels, so sudden changes cause physical and mental discomfort.

Jet lag is more noticeable when travelling eastward, as the body struggles to adapt to a shortened day. Although not dangerous, jet lag can reduce concentration, impact productivity and affect overall well-being.

• Fatigue and low energy
• Difficulty sleeping
• Digestive upset
• Reduced concentration
• Mood changes

Causes of Jet Lag

Jet lag occurs because the body’s circadian rhythm cannot adjust quickly to new time zones. Crossing several time zones forces the body to adapt to a different sleep‑wake cycle. Dehydration, alcohol, caffeine and irregular sleep before the journey can worsen symptoms.

Night flights and disrupted meal times also delay the body’s ability to adjust.

• Crossing multiple time zones
• Disrupted sleep pattern
• Dehydration
• Caffeine or alcohol during travel
• Flying eastward

Symptoms of Jet Lag

Symptoms may begin within hours of arrival and vary depending on the number of time zones crossed. Most symptoms improve as the body gradually adjusts.

Some travellers may feel unwell for several days, especially if returning from long‑distance international travel.

• Insomnia or fragmented sleep
• Daytime tiredness
• Difficulty focusing
• Irritability or mood swings
• Digestive discomfort

Treatment Options for Jet Lag

Treatment focuses on helping the internal clock adjust more quickly. Melatonin supplements, sleep‑hygiene habits, and adjusting bedtimes gradually are common strategies. Staying hydrated and avoiding heavy meals or caffeine near bedtime improve sleep quality.

Short‑term sleep aids may support travellers who struggle with temporary sleep disruption.

• Melatonin supplements
• Consistent sleep routines
• Short‑term sleep aids
• Hydration
• Light exposure therapy

Prevention & Long‑Term Management

Planning ahead reduces the impact of jet lag. Adjusting sleep patterns before travel, avoiding alcohol, staying hydrated and getting natural light exposure after arrival help reset the internal clock.

Light meals, gentle movement and good sleep hygiene improve long‑term resilience.

• Shift sleep times before travel
• Avoid caffeine and alcohol
• Spend time in natural daylight
• Stay hydrated
• Eat lighter meals

Seek advice if jet lag symptoms persist longer than one week, severely disrupt sleep or daily routines, or worsen underlying medical conditions. People with sleep disorders should seek guidance before long‑distance travel.