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Why You Need To Unplug Every 90 Minutes
The Ultradian Rhythm
Your brain can only focus for 90 to 120 minutes before it needs a break.
This is the ultradian rhythm, a cycle that’s present in both our sleeping (the 90-minute cycles during which we progress through the five stages of sleep) and waking lives (as we move from higher to lower alertness).
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Key Ideas
Breaks keep us from getting bored
The human brain just wasn’t built for the extended focus we ask of it these days.
The fix for this unfocused condition is simple—all we need is a brief interruption (aka a break) to ge...
Breaks and brain connections
Our brains have two modes:
- focused mode, which we use when we’re doing things like learning something new, writing or working) and
- diffuse mode, which is our more relaxed, daydreamy mode when we’re not thinking so hard.
The mind solves its stickiest problems while daydreaming—something you may have experienced while driving or taking a shower.
Breaks help us reevaluate our goals
When you work on a task continuously, it’s easy to lose focus and get lost in the weeds. In contrast, following a brief intermission, picking up where you left off forces you to take a few seconds to think globally about what you’re ultimately trying to achieve.
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Key Ideas
Personal Productivity Curves
A lot of the internal things that affect our productivity are out of our control. Our energy, focus, and motivation follow their own path or “productivity curve” throughout the day.
Energy curves
We’re naturally more energetic and motivated at specific times of the day. Researchers call this our Circadian Rhythm. Every person’s rhythm is slightly different, but the majority follow a similar pattern.
- Waking up. Our energy levels start to naturally rise.
- Around 10 am. We’ve hit our peak concentration levels that start to decline and dip between 1-3 pm.
- Afternoon. Our energy levels rise again until falling off again sometime between 9–11 pm.
90 Minute Cycles
We work best in natural cycles of 90-120 minute sessions before needing a break. When we need a break, our bodies send us signals, such as becoming hungry, sleepy, fidgeting, or losing focus.
If you ignore these signs and think you can just work through them, your body uses your reserve stores of energy to keep up. It means releasing stress hormones to give an extra kick of energy.
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Key Ideas
There is no perfect method for everyone
There is no "one size fits all schedule" for maximum productivity.
Because we all have particular strengths and weaknesses when it comes to time management and productivity, what works...
The Time Blocking Method
It involves planning out your day in advance and dedicating specific hours to accomplish specific tasks.
It’s important to block out both proactive blocks (when you focus on important tasks) and reactive blocks (when you allow time for requests and interruptions).
The Most Important Task Method (MIT)
Instead of writing a big to-do list and trying to get it all done, determine the 1-3 tasks that are absolutely essential and then focus on those tasks during the day.
You don’t do anything else until you’ve completed the three essential tasks.