Understanding Sleep Changes in Later Life
Among the less welcome aspects of growing older, diminished sleep quality frequently features prominently. The British Geriatrics Society underscores this concern, reporting that roughly 40 percent of individuals aged 65 and above regularly experience insomnia, with up to 75 percent suffering from some form of sleep disturbance. However, as World Sleep Day approaches on March 13, a reassuring perspective emerges: while sleep quality can decline with age, this deterioration is not an unavoidable fate.
Challenging the Myth of Inevitable Poor Sleep
"Fundamentally, your sleep doesn't have to change in your 60s or 70s, but circumstances tend to create a lot more vulnerability around that ageing point," explains Professor Jason Ellis, director of the Northumbria Centre for Sleep Research at Northumbria University.
"A significant challenge we face with older adults is they're often taught that poor sleep is normal – 'Oh, it's normal that you shouldn't sleep well, just as it's normal you should have aches and pains'. That's not accurate. The vulnerability exists, but it's not a fait accompli. It doesn't mean that every older adult cannot achieve good sleep."
Lisa Artis, deputy CEO of The Sleep Charity, reinforces this view: "It's crucial to emphasise that poor sleep is not an inevitable part of ageing. While sleep patterns naturally evolve, persistent sleep difficulties shouldn't simply be accepted as 'just getting older.'"
Increased Vulnerabilities Affecting Sleep
Both specialists concur that specific vulnerabilities render older individuals more prone to sleep issues. Professor Ellis elaborates: "Once we reach our 60s, numerous factors heighten vulnerability – illnesses, medications, multiple losses. These elements can create greater susceptibility to sleep problems."
"Similarly, we tend to gain some weight, increasing vulnerability to nocturnal breathing difficulties. Furthermore, menopause significantly impacts sleep, as the decline in oestrogen and progesterone hormones, which help maintain women's respiratory systems during sleep, becomes problematic."
Biological Shifts: Melatonin and Sleep Architecture
Ellis notes that melatonin, the hormone regulating sleep-wake cycles, diminishes after puberty. "That's actually when our sleep system begins to degenerate," he states. "Annually, we produce less natural melatonin and alter our sleep architecture."
This process means we start losing deep, slow-wave sleep essential for physical functioning from around age 25. "Consequently, by the time someone reaches their 60s, their internal sleep mechanisms are considerably less structured than in their 20s. It's a gradual decline."
Artis adds: "Sleep naturally transforms as we age – particularly from our 50s onward. While older adults still require approximately seven to nine hours nightly, the structure and quality can shift quite noticeably."
Circadian Rhythm Adjustments and Sleep Disturbances
Multiple biological and lifestyle factors contribute to changes in older people's internal body clocks. Artis explains that hormonal shifts, including reduced melatonin, play a role, and ageing associates with brain function alterations affecting sleep regulation.
"Older adults frequently feel sleepier earlier in the evening and awaken earlier in the morning," she says. "This is sometimes termed a 'phase advance' in sleep timing."
The reduction in deep, slow-wave sleep means lighter sleep becomes more easily disturbed. "As we age, we spend less time in deep, restorative sleep and more in lighter stages," Artis notes. "This renders us more susceptible to disturbances from noise, light, or physical discomfort. Many people also find they wake more frequently during the night and may struggle to return to sleep."
Lifestyle Impacts: Retirement and Sleep Patterns
Ellis highlights that life rhythms tend to be more structured for working individuals than retirees. Employed people often maintain regular times for waking, eating, exercising, and socialising, whereas retirement reduces the need for such structure, potentially affecting sleep.
"Losing those patterns can make the system more vulnerable to flexible sleep bouts rather than consolidated sleep," he observes.
Artis supplements: "Retired individuals may nap more during daytime hours, be less physically active, or spend reduced time exposed to natural daylight – all factors influencing sleep quality."
The Importance of Sleep Regularity
Older adults might believe that obtaining adequate sleep over 24 hours suffices, regardless of timing. However, Ellis cautions: "Emerging research suggests maintaining consistent sleep timing may be as crucial, if not more so, than sleep quantity."
"We examine sleep regularity versus duration for erratic sleepers. Unfortunately, most research focuses on younger adults or adolescents, so we don't fully comprehend whether the same principles apply to older adults' sleep regularity."
Assessing Sleep Impact and Seeking Solutions
Naturally, concerns arise when sleep patterns change or seem insufficient. Ellis stresses: "The initial step is determining whether it's causing problems. How do you feel during daytime hours – is sleep affecting your performance and necessary achievements? If so, this warrants discussion with your GP."
Ellis notes that GPs today don't automatically prescribe sleeping pills for sleep issues. For insomnia, cognitive behavioural therapy (CBT), addressing dysfunctional beliefs, attitudes, and habits affecting sleep, might be recommended.
For sleep disturbances from sleep apnoea (interrupted breathing during sleep), continuous positive airway pressure (CPAP) therapy, which maintains open airways nocturnally, could be suggested.
"Numerous therapies exist, not all medication-dependent," Ellis emphasises. "It involves identifying potential problems and tailoring solutions to maintain a robust sleep health framework."
Artis concludes: "While lighter or more fragmented sleep is common with ageing, ongoing sleep difficulties shouldn't be dismissed as mere ageing consequences. Minor adjustments to routines, light exposure, and bedroom environments can yield significant improvements. Crucially, support remains available – quality sleep is vital for physical health, cognitive function, and emotional wellbeing throughout life."
