For many, the day after a night of disrupted sleep or late-night activities poses a considerable challenge in maintaining alertness and energy. Dr. Dan Baumgardt, a lecturer at the University of Bristol’s School of Physiology, Pharmacology and Neuroscience, advises adopting several practical strategies to manage fatigue and improve focus during the daytime.

One effective approach is taking a brief cold shower or bath, which research indicates can stimulate brain regions involved in emotional processing, resulting in increased alertness and a more positive mood. Nutritional choices also play a critical role; a breakfast low in sugar but high in carbohydrates—such as porridge, bircher muesli, or wholemeal toast—combined with moderate protein, can help regulate blood sugar levels and sustain energy throughout the day. Nutritionist Rhiannon Lambert recommends consuming coffee alongside breakfast rather than on an empty stomach for steadier energy release.

Physical activity is another key factor. Studies show that even 30 minutes of moderate exercise, such as cycling, can enhance cognitive functions in sleep-deprived individuals. For those unable to commit to gym time, short bouts of stair climbing can provide a similar boost, equating to the energizing effect of a single espresso shot, according to research from the University of Georgia.

Exposure to natural light, particularly in the morning, helps reset circadian rhythms, supporting daytime alertness and improving sleep quality the following night. Even sitting near a window can have cognitive benefits, as demonstrated in studies involving office workers. Complementing this, a midday walk lasting 15 to 20 minutes can further elevate energy levels by increasing circulation and brain oxygenation.

Despite common beliefs, relying on sugary snacks for a quick energy fix may be counterproductive. Research from the University of Warwick found that higher sugar consumption correlates with increased fatigue and reduced alertness. Instead, snacking on pumpkin seeds—rich in magnesium, which aids energy production and muscle function—and kiwi fruit, which provides vitamin C and fiber, can help alleviate sluggishness and support digestive health.

Another technique gaining attention is the "coffee nap," involving the consumption of an espresso immediately before a short nap of 15 to 20 minutes. Neuroscientist Brice Faraut explains that the caffeine takes effect just as the nap ends, promoting wakefulness and reducing grogginess for several hours afterward.

Finally, incorporating frequent micro-breaks during work—such as brief pauses to stretch, snack, or engage in light conversation—can replenish depleted energy reserves, particularly on days of fatigue. Chewing gum, especially mint-flavored, also appears to improve focus and alertness through sensory stimulation and the act of chewing itself.

Overall, combining these strategies may help those grappling with sleep deprivation to navigate their daily demands with greater ease and cognitive clarity.