They say that your twenties is the prime of your life, where you get to do anything you want with all that energy and supposedly vibrant outlook on life.

But I say it's also the start of your life degenerating as you start to feel old all over.

It's the little things that start to pile up. Our bodies don't work like before. Our minds aren't so sharp anymore and we just plain, feel, old.

Here's 25 signs you're starting to feel old in your twenties

1) You can't manage more than one activity a day

Go to Orchard Road in the day? Okay cool.

Go home, get dressed again then head out for drinks? Forget it.

There's just no way you can experience the sheer agony of dragging yourself out of the door again.

2) Hangovers last like, forever

I'm talking spending the entire day after a night of binge drinking in bed. The headache can't seem to go away. It lasts up to eight hours even.

Even puking once doesn't cut it. You need to puke at least three times. Gross, but true for a lot of old twenties peeps. Like me.

3) The brightness of your smartphone/ tablet hurts your eyes

Anything past half, nay, a quarter of the bar and you start to squint. Then tears flow. Then a headache ensues.

And you're like, "Who the hell in the right mind would make such devil technology?!"

4) Backaches

Bend over. Pick something up. Have trouble standing straight next. Go, "Urghhh."

5) 2.4km run is hell during IPPT

Trying to get below, say, 12 minutes, is like running for record timing in a marathon. It's almost impossible!

6) When you look at the younger generation, you're like, "Back in my day I didn't get to enjoy such... Did I just say that?"

You've become THAT old person who laments about the old days and how spoilt the younger people are.

And then you find yourself constantly picking on them.

7) Your tolerance for alcohol has dwindled at least threefold

You retch after a single shot. You feel the buzz really quick and you escape any kind of drinking games. You know you have to steer clear of certain liquors AT ALL cost.

You basically can't last the entire night anymore.

8) You actually don't mind staying in on your weekends

Streaming movies and binge watching an entire TV series are like the best activities ever.

9) You cannot help but compare how much older you are than your younger friends

You're like, "My god. I'm 10 years older than you. That's a decade! That's both my hands held up! You were still a baby when I was taking my PSLE!"

10) You probably created a newfound cynicism for anything good in life

Why be happy? You're getting old. Doubt everything.

11) You enjoy doing old-people activities now, like taking long walks. You're also considering line dancing

Nothing like fresh air and being by your lonesome self.

And what? Those community centre courses are such a bargain!

12) You spit blood in the morning

And all you did was brush your teeth. What the hell gums?!

13) You then suddenly see the significance of visiting your dentist twice a year

Especially since your last visit was maybe five years ago. Or primary school.

14) Your Facebook feed is filled with friends getting married or having babies

And there you are, sitting right there lamenting how old you're feeling.

The clock is ticking!

15) The topic of getting old is ALWAYS brought up with your friends

"Oh man. We're getting old man."

"Ya sia..."

"Remember the first time we started clubbing?"

16) You're shocked to your very core to know what birth year permits entry to a club now

"1996?!"

"I was primary three in 1996!"

This will continue every year.

17) You're disgusted with today's idea of mainstream music

"Back in my day. We had songs WITH lyrics!"

Here we go again...

18) You're dumping the contact lens which you relied heavily upon to look good

Because wearing glasses are easier.

19) Hair products literally feels like they add 1kg on your head

Don't even get me started on how it makes your head feel like a volcano.

So you go for the totally not-give-a-crap look now where nothing is applied on your hair ever.

20) You've switched to a barber

Because hair salons have exorbitant prices! The hell?!

21) And you're like, "Anything."

When the barber asks what style you want him to cut.

Style?! Dude. Just make it clean and short.

22) You're fat and tired all the time

.... you're fat and tired all the time.

23) You hate socialising and making new friends

Because it's the same old crap.

"Oh so what do you work as?" Oh you know...

"Oh really? Do you know so-and-so there?" NO I DON'T THE COMPANY IS BIG OK.

24) You suddenly like going to Kinokuniya, Popular and any libraries

Because you finally think learning is cool. And books are the way to go.

25) You clicked, read and agree with this post

Got you there.

Alden Tan is a writer who graduated from NUS and is now doing the whole “quit my job to follow a dream” thing as he blogs about honest and real stories. Check out his free book, 12 Things Happy People Don’t Give a F**k About.

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