SLOP1521#

Introduction to Life: Foundations of Being a Person

Week 4 — Sleep, Health, and Exercise

Monday, Tuesday#

Monday: plan says asleep by 11:30pm. Actual: still awake at 3am finishing an assignment.

Tuesday: “will sleep early tonight,” typed into a note never looked at again.

Today’s scope#

Sleep, food, and exercise: the three areas of life most often optimised in intention, never in practice.

Sleep duration, exercise frequency, and nutrition at the plate level (what counts as a balanced meal), plus the fridge from Week 2, revisited. Detailed nutrition science (macronutrient targets, calorie counts) stays out of scope.

What’s ahead#

• How much sleep you actually need, and how to get there
• Jordan’s Week, fully unpacked
• Exercise as a frequency, not a location
• The fridge, revisited
• Nutrition, at the plate level: how to actually build a balanced meal

Definitions#

• Bedtime (noun) — a specific, named clock time at which one intends to be asleep, not merely “later.”
• Balanced meal (noun) — a plate containing more than one food group, particularly one that is not currently instant noodles.
• Exercise (noun) — physical activity undertaken on a stated schedule, distinguished from “the walk to the vending machine.”

Key point 1 — How much sleep you actually need#

Hirshkowitz, M., Whiton, K., Albert, S. M., et al. (2015). National Sleep Foundation’s sleep time duration recommendations: methodology and results summary. Sleep Health, 1(1), 40–43.

Seven to nine hours recommended for adults 18–64.

Check-in: Who got seven hours or more last night? Keep your hand up if you also got it the night before.

Key point 2 — How to actually get there#

Two things: a wake time fixed to the same clock time every day, weekends included.

And a screen wind-down that starts at a named time before bed — not “whenever I feel tired.”

Key point 3 — Jordan’s Week, Monday to Wednesday#

Monday: asleep-by-11:30 plan, awake at 3am finishing an assignment. The 7am gym slot goes the same way — four snoozes, then skipped entirely.

Tuesday: “will sleep early tonight,” written down, never reopened. 2am arrives via one more episode; the logged run was a walk to the vending machine and back, twice.

Wednesday: breakfast skipped, the same bowl of instant noodles twice in one day — reported to a friend, straight-faced, as “I’ve been so good with food lately.”

Key point 4 — Jordan’s Week, Thursday to Sunday#

Thursday: bed on time for once, then up at 4am for a single phone notification.

Friday: no plan was written at all.

Saturday: sleep until 2pm to “catch up,” followed by lying awake until 4am that night.

Sunday: next week’s plan, copied from this one, unchanged.

Six stated intentions, zero actual times — the week’s own Lab breaks down exactly where each plan met reality.

Check-in: Name one day in Jordan's Week where the stated plan and the actual outcome have nothing in common.

Key point 5 — Exercise as a frequency, not a location#

Chekroud, S. R., Gueorguieva, R., Zheutlin, A. B., Paulus, M., Krumholz, H. M., Krystal, J. H., & Chekroud, A. M. (2018). Association between physical exercise and mental health in 1.2 million individuals in the USA between 2011 and 2015. The Lancet Psychiatry, 5(9), 739–746.

1.49 fewer poor-mental-health days per month than non-exercisers. Benefits peaked around 45 minutes, 3–5 times a week.

More than 3 hours a day was associated with worse outcomes than none at all.

Check-in: According to this study, is more exercise always better? What does the data actually say?

Key point 6 — A beginner routine that hits that range#

Three sessions a week, 20–30 minutes each, at a stated time slot.

Any activity that raises your heart rate counts — a gym session is one option, not the only one.

A brisk walk on a fixed route satisfies the same frequency.

Key point 7 — The fridge, revisited#

Week 2’s fridge shelf hasn’t changed: condiments, one ageing lime, still nothing that constitutes a meal.

Which is exactly why Wednesday’s plan collapses into the same bowl of instant noodles twice in a day.

A sleep schedule and an exercise plan both assume there’s something to eat between them — an empty fridge breaks both.

Check-in: What's the direct link between an empty fridge and Wednesday's two servings of instant noodles?

Key point 8 — Nutrition, at the plate level: how to actually build a balanced meal#

Three items on the plate, at the same sitting, not spread across the day: a base (rice, pasta, bread), a protein (eggs, canned beans, last night’s leftover chicken), and something that isn’t beige (a vegetable — any vegetable, frozen counts).

A piece of fruit eaten four hours after the noodles doesn’t retroactively balance the noodles.

The only way the fridge from Week 2 supplies all three on a Wednesday is if it was stocked on the weekend before — checking for the first time on Wednesday night is checking too late.

Check-in: Look at what you actually ate at your last sitting — name the one food group missing from the plate.

In-lecture activity#

Pair-share: state your actual bedtime last night to your neighbour.

No judgment. No follow-up questions allowed.

Conclusion#

A plan has a time; an intention doesn’t. More isn’t always better.

The topic most students believe they’re managing and visibly aren’t.

You now have the real recommended range, a fixed wake time and wind-down to get there, a beginner exercise routine that isn’t tied to any one location, the fridge as a reminder that a schedule needs something to actually run on, and the three-item test for whether what’s on the plate actually counts as a meal.

Coming up: this week’s lab (the sleep-and-exercise plan), and Assignment 1 (Makeover) due this Friday at 12:00.

This week’s reflection#

Due 12:00 Tuesday of week 5:

Describe a night your sleep schedule held, or didn’t, and name the one factor that decided which.

References#

Hirshkowitz, M., Whiton, K., Albert, S. M., et al. (2015). National Sleep Foundation’s sleep time duration recommendations: methodology and results summary. Sleep Health, 1(1), 40–43.

Chekroud, S. R., Gueorguieva, R., Zheutlin, A. B., Paulus, M., Krumholz, H. M., Krystal, J. H., & Chekroud, A. M. (2018). Association between physical exercise and mental health in 1.2 million individuals in the USA between 2011 and 2015. The Lancet Psychiatry, 5(9), 739–746.